HOW TO REFURBISH SEWING MACHINES
A step ste p -by-ste -by-ste p guide for fo r
Sin ger Mod els 66, 99, 15 K, an d 201 201
Netley Marsh, Southampton Hampshire SO40 7GY Telephone: 023 8086 9697 Fax: 023 8086 8086 8544 8544 email:
[email protected] [email protected] Web: www.tfsr www.tfsr.org .org
Registered Charity : 280437 © Tools for Self Reliance 2006
13.1.2006
GETTING STARTED - INTRODUCTION
1
INDEX TO SECTIONS 1
GETTING STARTED
A - In tr tro du du ct ct i o n. n.. . Using the manual and the helpful paperwork B - Th e m ac ac h in in es es we we se se nd nd and the o nes we don’t don’t C - To o ls ls a nd nd m a te te ri ri al al s you will need D - Re co co gn gn is is in in g t he he pa pa rt rt s of a sewing machine E - Un de de rs rs tta a n di di n g h ow ow a sewing machine works works
2
REFURBISHING
A - Th e Ca s e B - Th e Ha nd nd le le Me ch ch an an is is m C - Th e Ba l a n ce ce Wh ee ee l D - Th e Bo Bo bb bb i n Wi Wi n de de r E - Th e To p of of t he he Ma Ma ch ch in in e F - Th e Te ns ns io io n Me Me ch ch an an is is m
Thank you for helping Tools for Self Reliance. Each year we send hundreds of sewing machines to pe op le in in Africa, Africa, main ly wom en’s en’s groups, who are trying to make life a little easier for themselves and for their comm un ity. ity.
r stepstep- by-step ‘guide ‘Th isonis you h ow to refu refu rbish rbish sewing m achin achin es to an acceptable acceptable stand ard
’’
These people are able to make school and work uniforms, clothes for church and special occasions, occasions, and to alter and men d everyday items at prices affordable by others in their com com m un ity. This manual is designed to be a step-by-step guide on how to refurbish refurbish sewing ma chines to an acceptable standard. It is not intended that you read every word, but rather dip into it at app ropriate places. places.
G - Th e He a d H - Th e Lo Lo we we r Bo b bi bi n Ar Are a I - Th e Un de rs i d e J - Te s t i n g K - Fault Diagnosis Diagnosis
3
ANCILLARIES
p l e We w a n t p eo gh t e d t o b e d el i g e w h en t h e y se t h ei r sew i n g m a ch i n es.
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A - Bo bb bb i n s & Ne ed ed le s B - Ha n d b o o ks C - Se wi wi n g At At t a c hm hm e nt nt s
4
TREADLES
A - Tre ad adl e Ba Ba s e s B - Tre ad adl e Ca bi bi ne ne ts ts
5
ELECTRICS
A - El ec ec tr tri c Co Co n ve ve rs rs io io n s B - El e ct ct ri c Ma Ma c h iin n es es
6
APPENDIX
A - Gl Gl o ss ss ar ary
[1] A - 1
1
The very first first thin g to think ab out is that the sewing machine you are p repa ring or fixing fixing is going going to be used much more frequently than it has previously previously been . It is is likely likely to b e used in du sty conditions and the person using it cannot just ‘pop down to the shop’ to get a replacement p art or to h ave a fault fixed. fixed. For these rea son s we don’t don’t just send any sewing machine. We want to send machines that are safe, will do the job needed, which will last, and for which spares a re available. available.
Bea r in m in d t h at t h e new own er of of the m achin achin e cann ot just ‘pop ‘pop down to th e shop’ shop’ for a spare spare part.
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We want people to be delighted when they see their sewing machines, not dismayed that the m achine is scruff scruffy and not working. We on ly send certain m akes and models and we have a rigorous refurbishing procedure - along the line line s of a qu ality full full service, service, valeting an d MOT. MOT.
13.1.2006
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GETTING GETTING START STARTED ED - U SING SIN G THE THE MANUAL
1
STEP BY STEP The best way to file the loose leaves of you you r m an ua l is is in plastic sleeves sleeves in in a bind er - b oth readily readily available at W.H.Smith and most stationers. This ensures the pages will be preserved and you can flip through them with dirty or oily hand s without without a p roblem. roblem. The main sections sections of the m anual give comprehensive descriptions of each part of the m achine with illustrations showing the work to be don e. The m anu al is comp rehensive rehensive bu t don’t don’t try to absorb all the information - just dip into it as you need it.
And remem ber, it it is mo re accessible when you use it alongside the m achine you are working working on. If you are just begining to refurbish machines please read Section 1 - Getting Started. This outlines the procedures and the paperwork, explains simply how a Sewing Machine works and describes the Singer models we are concerned with. From time-to-time we expect to issue updates of pages if policy changes or if we learn of a better way to tackle a task. For this reason we have included an issue date at the top right right han d corner of every page.
[1] A - 2
The ma nu al is is written written in sections sections which correspon correspon d to the sections of the Sewing Mach ine Checklist. Checklist. We suggest you work through a ma chine - section by section section - in the sam e order as the list. list. Using Using the m anu al in in this way you you will will find find you h ave all the inform ation you need to fully refurbish machines and correct common faults. We welcom welcom e tips and feed-back feed-back from you , if you th in k th ere is som som ething else else we shou shou ld includ e that will be of benefit to other refurbishers.
13.1.2006
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GETTING STARTED - HELPFUL PAPERWORK
At Netley Marsh we are sending hu nd reds of refurbished refurbished m achines to Afri Africa ca whilst dealing with h un dreds of other unrefurbished m achines, so so it is is im im portan t that we are able to distinguish m achin es easily. easily. For this reason we have various stages of pap erwork which which n eed to be com pleted prop erly. erly. Sewing machine check list. This is inten inten ded as a prom pt list list for the tasks to be don e as you you are refurbishing refurbishing a mach ine - not as a list to be ticked off after the m achine is finished. finished. If you have problems, they should be noted here. (Use the back of the sheet if it it is ne eded as a continu ation). The list list should be p ut inside the case with the machine. Please no te any problem s or defici deficiencies encies on the refurbishment record on the ou tside tside of the case.
The sewing machine refurbishing record. This is a summary of the check list and should be stuck on an end face outside the sewing machine case. In this way, without having to open the machine, the checker can see: a ) if t h e re re a re re a n y p r o b le le m s w it it h the machine that need attending to or... b) if any spares spares need add ing.
[1] A - 3
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13.1.2006
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GETTING GETTING STA STARTED RTED - THE TH E MACHIN MACHINES ES WE WE DO SEND S END RECOGNISING THE MODEL MOD ELS S
The manual machines we send, both h andle and treadle, treadle, must be Singer round bobbin models 66, 99, 15K o r 201. Start by measuring the length of the machine base and then un covering covering the bobbin area. If the base base is 300 mm long your machine is a 99. Caution: Som Som e m odern 99s have a solid balance wheel. There is also a 185 model, very similar to the 99, seen infrequ en tly. tly. Mostly the se are electric with with a solid solid ba lance wheel. We cannot convert either either of these to hand machines unless the solid wheel has a notch to take take a h andle. Apa rt from th e size size the 99 an d 66 m odels are virtuall virtually y the sam e an d are known as oscillating hook machines.
m m 3 0 0
99
With O scillating hook machines the stitch forming mechanism is underneath the machine bed and oscillates (turns backwards and forwards through 180 degrees for each stitch). By slowly turning the balance wheel over whilst looking at the lower bobbin assembly you will see how the hook (which fits around the bobb in case) case) rotates rotates in one d irecti irection on a nd then back . It It does not complete a full 360 degree rotation.
m m 0 7 3
If the base measures measures 370 mm long and the bobbin is vertical vertical as a wheel - then it is a 15K. It is distinctive because of the prominent tension mounting to the left left of the face plate. The 15K is also an oscillating hook machine.
15K [1] B -1
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GETTING GETTING STA STARTED RTED - THE TH E MACHIN MACHINES ES WE WE DO SEND S END
If the the base base is 370 370 mm long, the bobbin is lying horizontally flat and the hook ring oscillates back and forwar forward, d, this is a 66. This is virtually virtually a larger larger an d h eavier version version of the 99. Singer mad e various various chan ges and modifications to these machines over the years. We later look in det ail at the m ain changes which affect refurbishment. They include (among others) a major chan ge to the lower lower bobbin latch assembly and changes to the upper tension mechanism.
m 3 7 0 m
66
If the the base base is 370 370 mm long, the bobbin is lying horizontally flat and the hook ring ring rotates rotates rather rather than oscillates then this is a 201. The 201 has a distinctive stitch length regulator control (on the front near the balance wheel) with numbers for required settings.
m 3 7 0 m
201 [1] B - 2
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GETTING GETTING STA STARTED RTED - THE TH E MACHIN MACHINES ES WE D O NOT SEND
(1) Lon Lon g Bobbin
(2) Small Ten Ten sion
(4)
1
Electric Electric Con Con version s
Over the years a number of 15K, 66, 66, 99 99 and 201 man ual ma chines were converted for use to electricity. We do not send electrically electrically con verted machines in this form as we have a good supp ly of modern electrics which have greater versatility satility.. We We convert th em back for manu al use by removing removing the bolton motor and light and then we fit fit a ha nd le.
We do not send machines which use this type of long bobbin (or shuttle) because we are are not con fident that spares for them are readily available in African counties.
We do not send 66 or 99 machines if they have a small tension mechanism because we cannot get the replacement springs for for them .
(3) Rim Bob bin Winde Winde rs Later machines, designed solely for use with electric motors, had no u se of a spoked balance wheel and the solid wheel was introduced.
Shu ttle bob bin m achines are easily recognised because they have two long cover cover plates plates ov over the b o b b i n a r e a ( round bobbin m a ch ch i n e s h a v e a si n g le le co ve ve r p la te ov er th e bo bb in area .) The round bobbin technology is used on present day machines, which guarantees its continued wide wide distribution distribution .
tee y o u r a s t see d o n o t w lee a s P l f o r t o n m e a n d e f lee t i m u a b l a l u va v see a n y o f t h e s g n n i h s s i b r u f ree r s.. n e s m a c h i n t y p e o f m
In general, if you you get a machine which is not one of our 15K, 15K, 66, 99 or 201 specified models, please check with Netley before working on it.
Som e solid wheels have an indented slot slot cut into them and can be convertconverted to han d operation.
We do n ot se nd any early m odels with with th e bob bin winders working working on the rim of the balance wheel as shown here. We cann ot get the rub ber r ings in this large size. size. Neither do we sent early Model 15s (witho ut th e ‘K ‘K’ suffix suffix)) as t he needle threads in the opposite direction, and would be confusing for for th e recipient. (The 201 also threads in the opp osite osite d irecti irection on but we receive receive en ough of these to su pp ly all 201s 201s in a group kit). kit).
[1] B - 3
Any 'long base' m achines (mainly 201s) 201s) can be con verted to trea dle ope ration. There is a full explanation of when machines can be modified to hand operation o n p age [2] C-2. Although they are rare, be aware that there are two models, the 201K2 and the 15K91 which have the electric motor built into the ma in p illar illar.. This This m eans th at even if you attach a handle mechanism, the drag of the motor is substantial so use them for spares on ly. ly. Don’t Don’t waste tim e on co nversions.
13.1.2006
GETTING STARTED - TOOLS YOU WILL NEED
1
1
Screwdrivers: The m ain to ol you you will will be using is a screwdriver and a well chosen selection of sizes is essential. Singer screws have narrow slots so make sure the screwdrivers have thin b lades to fit fit them . Some of the smaller screws are set into recesses, so choose screwdrivers with parallel sides to th e blade if po ssible: Id eal siz es an d bl ad e w id th s are: !
9-10 9-10 mm with with good han dle ( for fo r stu bb orn screws ).
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5 mm with with sh aft length length o f 3-5 cm (n eeds to be short short for awkward places).
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4 mm with with sh aft length length o f 20 cm cm (opposite reason to that above).
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4 mm - not longer longer than 16 cm overa ll.
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3 mm - not longer longer than 13 cm overa ll.
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2 m m Sin Sin ger’s ger’s Ten Ten sion screwdriver.
We ha ve mad e this selection selection of screwdrivers available available to h an d at each of the work places in the Netley Marsh sewing machine workshop.
An effective answer to extra leverage for stubborn larger screws is to use a spanner as a han dle on a square-shan ked screwdriver screwdriver.. (You can use Mole Grips Grips on rou nd shan ks). ks).
In addition, we have foun foun d the followi following ng ra nge o f tools are u sed all the t ime - th ey includ includ e:. Frequently used too ls: !
Tweezers
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Engineers Pliers Pliers (medium size) size)
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Snipe nosed pliers pliers
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Scissors
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Small Nail Punch
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Needle Needle Threader
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Piece of sheet m etal 1” (2.5 (2.5 cm ) squ squ are x .048” - .050” thick for gauging Feed Feed Dog height.
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A plastic box, tin lid or o the r receptacle receptacle in wh ich ich to p ut a ll rem oved screws etc.
[1] C - 1
13.1.2006
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GETTING GETTIN G ST STARTED ARTED - TOOLS & MATERIAL MATERIALS S YOU YOU WILL NEED
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Occasionally Occasionally used to ols: The following tools are needed less frequ frequ en tly. tly. We keep exam ples of these available for communal use in the Netley workshop: workshop: ! ! !
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Medium Medium an d small ham mer Mallet Large screwdriver 13 mm , par ticularly for dism dism an tling tling handles. Cranked (right-angled) screwdriver, screwdriver, or long 4 m m screwdriver screwdriver with blade cut at an angle of app roximate roximate ly 150. AF Ring Ring Span ne rs: 5/16, 3/ 8, 7/ 16, 1/ 2, 9/ 16, 5/ 8, 11/ 16, and 3/4. Adjustable Spanner Mole Grips 1ft 1ft steel rule, meta l tape measure. Philips Philips screwdrivers screwdrivers G Clam Clam ps Saws, hacksaw, junior hacksaw, coping saw. saw. Han d drill an d selection of sm all drills. drills. Pincers Pincers an d wire wire cutters. Files Centre and n ail pu nch es. Small Engineers vice. Sm all block of wood wood .
We bu y rings, rings, thread take up springs, need les and b elts new an d can supp ly these to you proba bly cheaper th an you can get them locally locally Consumables ! ! ! ! !
Thick felt felt strips to cu t Y shapes. ( for oil in g h ook rin g). Thin felt for cuttin g rings. ( for cot to n reel rests ). Rub ber rings (tyres). ( for bo bb in w in d er ). Ten sion sp rings. Needles (new, for testing testing stitchin stitchin g).
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Clean Clean m aterial. aterial. (to test test m achine achine with , e.g. e.g. old cotton bed sheets sheets). Reels of cotton to test th e m achine with. (tw o contrastcontrastin g colours colours su su ch as red red an d yellow yell ow are b est ). Leath er dr ive ive be lts. ( for fo r trea d les ).
(not essentia essentia l but very useful).
Too ls and m aterials for cleaning and oiling ! ! ! ! ! ! ! ! !
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Tooth b rush. 1” dry paintbru sh. Other sma ll brush es. Brass wire brush . Fine Fine em ery paper. Scouring p ads. Fine Fine wire wool Plenty of clean, n on -fluff -fluffy y rag A can of sewing sewing m achin e oil. ( p lea se do d o n ot u se an y ot h er type of oil ). Freeing Freeing pe ne tratin g oil. oil. ( AC90 is u sed at Net ley M arsh and is exce excelle llent nt bu t WD40 is m ore ore available).
If you need help getting hold of any of these tools call Netley Marsh to see if we might be able to help.
Spare Spare Parts If you are in n eed of a spare p art, we hold stocks of some second hand parts from from old m achines achines at Netley Marsh - ch eck with with you r Group Sup po rt Worker. Worker. If you you are regu larly larly refurb refurb ishing machines (an d have the space)...
[1] C - 2
it is well well worthwh ile ile keep ing an y scrap m achines for spare parts. Don’t Don’t be tem pted to strip a m achine to a pile pile of nu ts and bo lts. lts. It It is better to keep a scrap machine in on e piece piece and rob it for spares spares as need ed.
13.1.2006
GETTING STARTED - RECOGNISING THE MACHINE PARTS
1
Presser regulating thumbscrew
Arm
Spool p in
1
Bobbin winder
Stitch length regulator
Bed p late
Handle
201 MODEL
Balance wh eel
Thread take up lever
Clam Clam p stop m otion screw screw
Presser foot lifter
Face plate
Tension mechanism
Presser b ar
Presser foot
Needle clamping screw
Throat plate
[1] D - 1
Needle bar
Feed dog (under presser foot)
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GETTING STARTED - RECOGNISING THE MACHINE PARTS
In the pictures on the previous pages are the nam es of the m ain parts of the sewing machine which we have used in th is m anual.
66
Becau se m ode ls vary vary,, some o f the parts and controls may look slightly slightly differen differen t bu t the y do pro vide vide the sam e fun fun ction.
15k
Stitch len gth regulator controls.
The earlier models required experience and guesswork but later 99 99 mod els (as (as shown) had a numbered guide to stitches per inch. The introdu ction of the 201 (bot(bottom right) provided 8 forward stitch stitch lengths lengths and the sam sam e in reverse..
201
99
The pictures opposite show the main styles of the stitch length regulator controls.
Ne w Style
Old Style
Ten sion Mechan ism. Top of the m achine:
15k
Explained fully in the following section on ‘How a Sewing Machin e Works’ Works’, the po sition sition an d look of the main (top) tension mechanism also varies with different m odels. odels.
66 & 99
The 15K is the most distinctive, mou nted outside the machine at the face plate plate end . Early Early 99s 99s are the sam e as 66s but the later ones look like the 201 and have a disc-dial disc-dial with with n um ber settings. Bot t om of t he m a ch in e:
201
The bobbin case must be revealed for the differences between m odels to be app reciatreciated. This too is dealt with in the next section.
[1] D - 2
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GETTING ST S TARTED ARTED - H OW A SEWING MACHINE MACHIN E WORKS
The mechanism of a sewing machine can be divided into the four area s:
Rotating driveshaft
1. MOTI MOTIV VE SOURCE SOURCE 2 . STITCH STITCH FORMA FORMATIO TION N 3 . FABRIC MOVEME MOVEMENT NT 4. THREA HREAD CONTRO CONTROL L
Hook Ring Crank
Hook Ring
Needle b ar
Bobbin winding is in the nature of an add-on activity, covered by its own section. All t h e illu il lu stra ti on s in th is sect ion are of a Model 66 or 99. 99. Variations for fo r ot h er m od els are d escrib ed in the sections dealing with the ind ividu al featu featu res. res.
1. MOTI MOTIV VE SOURCE SOURCE Wheth er han d driven or powered by an electric motor or treadle belt, the connection to the machine is the balance wheel. This serves to even out any ‘lumpiness’ in the machine to give give a smooth action.
Rotating driveshaft
These levers levers con vert the revolution of the drive shaft
2 . STITCH STITCH FORMA FORMATIO TION N
...i ...into nto th e up and down m oveovemen t of the need le bar. bar.
Need le m ov em en t : The rotating driveshaft in the arm of the m achine achine conn ects to the needle bar through levers in the head to produce the up and down m ovem ovem ent of the needle. The sewing machine needle is a highly sophisticated piece of design which we look at in detail on the followi following ng p age. Stitch ma king :
The hook ring crank sha ft links links with levers to turn th e hook ring ring below the base p late in a part circle.. circle....
The drive shaft has a vertical crank attached to it, going going down under the base plate. Again, by a series of levers, levers, this con ne cts to a hook ring. The hook ring ring picks picks up the u pp er thread and guides it round the bob bin holding the lower lower thread.
...and ...and th e hook picks up the loop made by the need le. le.
Using the up and down movemen t of the needle needle and the rotation of the hook ring the two threads are looped together to form the stitch.
[1] E - 1
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GETTING ST S TARTED ARTED - HOW A SEWING MACHINE MACHIN E WORKS WORKS
1
2 . STITCH STITCH FORMA FORMATIO TION N (Continued) Flat Flat side at the top end to secure it to the n eedle bar.
The Needle : The needle used in most of the domestic machines we handle ha s the followi following ng featu res:
On t he opp osite side a ‘long ‘long grove’ grove’ runs from from n ear the top, down to the eye. Withou t th is groove groove to act as a channel the needle could not function properly
! A flat
side side at the top end to secure it to the n eedle bar. (interlock (interlockers ers and some industrials use roun d needles).
‘Sh ‘Sh or t gro ove’. ove’. ! On
the sam e side side of the need le, le, a thinning of the need le just just ab ove ove the eye. eye.
! On
th e opp osite side side of the need le, le, a groove groove ru ns from near the top, down down to the eye.
When the n eedle pierces pierces the fabric on the down stroke, stroke, the thread on on e side will lie lie in t he groove. When the needle starts to rise again, the thread in the groove rises with it, but on the other side, the thread is pinched between th e cloth cloth an d the side of the n eedle eedle
Downward stroke As the nee dle passes through the cloth ... ...
...th ...th e groove is long enou gh and deep enough to allow allow the threa d to run th rough it freely.
Bobbin thread.
Stitch formation.
‘Short gro ove’. ove’.
On the upward stroke th e friction friction between the thread and th e cloth cloth produces a loop.
This friction against the fabric causes the thread to be retarded and a loop is formed just above the eye of the n eedle. The upward stroke of the need le creates the crucial m om ent in the sewing cycle and, as you can see from the illustration, the action takes place place beneath the cloth.
Upward stroke
Spool thread
Upper thread
Bobbin thread
Needle
The Hook Ring : As the h ook ring turn s in its part circle, circle, the ho ok picks up th e loop made by the needle and drags it round the lower lower bobbin. The thread then slips slips off the hook an d, as the need le bar rises, rises, is pu lled lled roun d the lower bobbin to m ake the stitch. stitch.
This action in the stitch cycle is the m ost imp imp ortant combination of movements performed by the machine.
Accurate synchronisation (or timin g) between between the sim sim ultaneous tasks of stitch formation is essential tial for the m achine to work.
On th e far right, right, you you can see that the bobbin thread has been encircled by the stitch loop formed by the top thread.
And yet, at n orm al sewing sewing speed, it only takes abo ut a fifth fifth of a second to complete, which is app roximately roximately the time required to wink your eye.
If you thread up a machine, and sew a few stitches slowly on the edge of a piece of cloth with the cover cover plate op en, you can see this stitch forma tion for yourself. yourself.
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1
GETTING ST S TARTED ARTED - H OW A SEWING MACHINE MACHIN E WORKS
3 . FABRIC MOVEME MOVEMENT NT At each revolution of the m achine the teeth of the feed dog rise slightly slightly above the ba se plate.
Presser regulating screw
Presser ba r lifter lifter
Presser foot (raised)
Fe e d dog teeth
Feed d og crank
The teeth grip the underside of the cloth and feed it forward a tiny measured amount determ ined by the setting of the stitch length regulator. The movemen t of the feed dog is generated through yet more levers, levers, from from an oth er vertical sha sha ft working from from the d rive shaft.
Feed dog rock sha ft
The feed do g crank is pivoted h alfway alfway down. The opera tion of the stitch length knob knob ch anges the position of this pivot...
Fa Fa b ri c con t ro l:
The fabric is held tight during stitching by the presser foot squeezing the fabric against the teeth of the feed dog or the throat plate while the feed dog is below the p late. late.
...which ...which varies th e amoun t of movement of the feed do g... g... ...and ...and con trols the stitch length.
The amount of pressure can be regulated regulated by the presser regulatregulating screw screw on top of the hea d an d released completely by raising the presser b ar lifter. lifter.
While the needle and thread penetrate the fabric, the feed dog is still and the fabric is held between the presser foot and the throat plate, keeping it taut. As the needle descends, so does the feed d og.
Stitch length adjuster
Feed dog
Presser foot
As the needle is coming up out of the fabric, the feed dog is moving back. The fabric is still held between the presser foot and the throat plate.
As the n eedle continues to move up, and to b ring the stitch with it, the feed dog is also moving up towa rds the fabric. The fabric is still held between the presser foot and the throat plate.
[1] E - 3
As the stitch is being set, the feed d og rises rises above the throat plate, and its teeth moves the fabric forward by one stitch length.
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GETTING ST S TARTED ARTED - H OW A SEWING MACHINE MACHIN E WORKS
4 . THREA THREAD D CONTROL CONTROL Stitch tension: The tightne ss of the stitch is con trolled by two different tension mechanisms:
(3) The upper tension is released comp letely letely when when the p resser resser bar lifter is raised. The lifter presses on a p in which which in turn p ushes the discs apart. When the ten sion sion is released released the fabric can b e rem oved easily. easily. Slack th read lever: While the upper thread is being taken round the lower bobbin it is making a large loop. Slack thread take up lever
4
Bobbin thread tension screw
1
(1 ) The bob bin has a small spring spring on its case, which delivers the thread u nd er a slig slight ht ten sion. sion. Slack thread lever
2
(4) To provide sufficient thread for this loop (not under tension) the thread take up lever on the head travels downwards, rising again again to p ull the stitch stitch tight. tight. Thread Thread t ake up spring: Discs
Thumb nut
(2 ) The m ain tension tension m echanism echanism is on the upper thread, on the head of the machine.
As the slack thread lever reaches the top of its travel, the feed dog is also moving forward to make the stitch. Thread take up spring
The thread passes between two saucer shaped discs. The pressure between the discs can be varied varied b y the ten sion sion regulat-ing regulat-ing thumb nut (ii) (ii) push es against second lever...
(i) Presser release a rm lifted...
(iii) which presses on en d of tension release pin
3
At this point the thread is under extra extra tension an d - to avoid snapping the thread at long stitch lengths - it it is passed through th e thread take up spring in the tension sion mechan ism ism which which cushions the strain. strain.
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REFURBISHING - SEWING MACHINE CASES
2
(7) Clean out all debris debris fr from under the machine and from from the accessories compartment. Remember that the machines will not remain upright during transit, so so an y pins, needles and fluff in the bottom may well be deposited in the works during that tim e un less less you you remove it. 4 (1) Round bobbin machines come in a variety of cases, but mostly in the suitcase, (shown above) or dom ed types (as below). below).
(4) Release Release the retaining catch.
8 (8 8)) 5 2
(5) Remove the the machine from from its case by tilting it back and undo ing the two grub screws. screws.
Ex am am i n e t he he s ta ta ttee o f a n y accessories and needles present for rust and damage. Discard Discard any that are are not in goo d condition.
(2) Examine cases for signs of woodworm! Customs do examine shipments. Signs igns of worm worm - treated or not have previously delayed entire shipm en ts. This is is not o nly a disappointment, but also incurs expen sive sive p ort levies levies for for d elaying elaying clearance. So discard the box, do not treat it.
9 6
(6) Then lift it clear of the two finger hinges.
3 (3) The m achin e itself is held in a wooden base by two hinges at the back of the m achine an d a catch at the right han d side.
7
[2] A - 1
(9) Turn urn the base base over over and make sure the bolts ho lding in the m achine hinges are present and tight. Slight damage to the case is not important, but the case should be secure an d safe to use. Check all joints joints a nd re-glue re-glue where n eeded. Make sure the corner blocks are present and secure. Either reglue or remove any veneer that has spli split. t. Holes Holes in the bottom ma y be repaired either by replacing the ply completely or where the damage is small gluing a patch to the inside of the base.
13.1.2006
2
2
REFURBISHING - SEWING MACHINE CASES (12) Three different keys have been used over over the years. years. The square ended one came first, then the on e with with the flat flat tongue, follow followed ed by the n otch ed on e. This last last type cann ot be removed from from the lock while while the lock is un don e. If a key is missing, missing, th e lid can be unlocked with a small screw-driver, or the tang of a file for the first type.
10
Type B
15
Type C
(10) If one o r more of the rubber feet are worn or miss ing, rem ove all four four com pletely.
16
13
(15) Type B and (16) Type C are less problematical, but can sometimes become bent. Make sure the bottom fitting lies level with the case, and the top one then secures the case. case.
(13) If the key is missin g make a replacemen t fr from om a flat cut nail, with the end filed as required and the o ther end ben t for grip. grip.
11 (11) Make sure the sm all ‘half ‘half mo on’leather or rubber rubber pieces are intact on top o f the corner blocks at the front front o f the machine. These deaden any vibration and also lift the machine a little so that th e cover cover plate does not foul the side of the base when opened.
The case fittings fittings vary but in ea ch case, they rely on the lock to h old the lid in correct alig alignm nm ent. Each p air of fittings fittings works in in the same way with the top fitting entering entering the bottom one, and the lid lid th en slid slid to the left to en gage.
17 (17) Clean ou t any fluff etc from from the case fittings fittings to e nsure they can latch properly. properly.
Type A
Domed case: The lid and the base are held together by a lock lock at one en d, and a case fitting fitting at th e oth er.
14
12
18
(14) Type A in the picture is an early model and attaches to the ou tside of the case.
(18) Oil Oil the lock and work it it a few times to make sure it is working e asily. asily.
Quite often the fixing screws work loose. loose. If the h oles are too worn to tighten the screws, screws, push a sliver of wood into the holes and try again. again.
The lock is only attached to its cover plate by two sm all flanges. flanges. If these h ave becom e loose, they can be tapped with a hammer and pu nch to tighten tighten them.
[2] A - 2
13.1.2006
2
REFURBISHING - SEWING MACHINE CASES
2
24
21
19
(24) (24) You m ay find find a b ase extension piece inside the box like the on e shown a bove. This is is a roughly square wooden piece with a metal bracket bracket at one end.
(19) Check that the handle is secure. Tighten up the nuts inside the lid. If the h and le has been loose for for a while, the wood may be broken roun d it. If so, spread the load by sandwiching the han dle between metal plates outside and inside the lid. 25 22 Suitcase type case (22) The bottom of the lid has pin s, which fit int int o ho les in in sm all m etal plates at the bottom of the box. Make sure these are intact. The leatherette cover of the case is frequently scuffed and torn. Where possible glue down any torn pieces. pieces. Finally, for all types 20 (20) The machine in its base slides slides into the box, which open s from the side. There There are two b attens at each side that prevent the m achine from m oving. oving.
(21) The other type uses spring catches, and these can be damaged. Replace them with with a simsimple latch , or fasten fasten u p with string or rope and leave it to us at Netley Marsh, as we h ave spares.
If present, check that: a. It is the right fitting for the case. (Cases do get swapped about), and b. That it is in good condition with no loose ply ply or ben t brackets. For storage, the extension p iece is kept in the lid of both types of cases. The bracket fits into a notch or slot slot at on e end , while while a wooden bracket holds an opposite corn er. It is th en held in in place by a catch similar to that holding the machine in the case. Make sure this catch is tight enou gh to do its fun ction. 26
Two types of fastenings are used on these cases. One is a suitcase type lock with with latch an d lock. Since the latch latch is secure secure en ough, we do not bother with providing keys.
(25) (25) It fits fits into into the left left han d b ottom case fitting to extend the working area. There is a different different bracket for case fittings B or C.
23 (23) Wipe Wipe over the o utside o f the box with a damp cloth to remove flyspecks and dirt. If you wish, a final polish can be given. given. It can m ake it difficult difficult to attach the Refurbishm efurbishm ent Record form though!
[2] A - 3
(26) (26) You will will som etim es find other metal fittings inside the cases, cases, inten inten ded to locate oil cans etc. You m ay rem ove these as they are are not needed.
13.1.2006
HANDLE MECHANISM
2 The h andle attachm attachm ent m ay have have suffered wear and tear but we have to en sure it is is in good cond ition tion both comfortabl comfortablee and quiet to use for hours at a time.
Check that th e wooden h and le is is turning on its spindle, not that the spind le is is turning with it. The spindle should be securely held in the crank han dle lever, lever, neither turning with with th e wooden hand le, no r being loose.
2 (4) Detach Detach the handl handlee mechanism from from the machine body by undoing the single screw bolt. The ma chine you are working working on has probably stood idle for a nu m ber of years years and th e oil in the handle gear housing may have b e co co m e g u m m e d .
1 (1) Remove Remove the machine from from its case. The handle arm will will be folded down.
2 (2) Place Place the the handle handle in its its working positio n by lifting lifting the arm an d clicking clicking into place. To release pull the small spring stud. On older mach ines, the ha nd le is is held in the latched latched position position b y a pin inside the bracket, rather than the spring stud. stud.
3 (3) A possib possible le solut solution ion to correct this problem problem is to rest the e nd of the h andle on a m etal object object and tighten the joint using a punch and hamm er. er. If the h and le is is in po or cond ition ition or refuses to budge, it could be more productive to exchange it for a better quality spare unit. If you don’t have a spare, highlight the problem on the refurbishmen t record record on the outside of the case and we will will replace replace the un it from o ur st ock at Netley. Netley. It is worth no ting that some han dle un its vary vary in size size an d are n ot interchangeable between different models. In particular, the bracket length varies. If you chan ge han dles between m odels, make sure that the driver arm engages with the balance wheel without fouling the bobbin wind wind er when it is is latched latched d own.
5 (5) Remove the cover cover plate plate to reveal the internal gea r me chanism and make sure sure the wo rkings rkings are clean and free free from grime and any odd bits of lint o r thread. thread. After cleaning, turn the handle slowly through a complete turn. If the re is resistance at an y point, examine examine the teeth and clean clean out an y deb ris. App ly a d rop of oil before rep lacing the cover plate. There There are oiling holes in both the drive arm and th e main gear. App ly a drop of oil to each and run for a few turns.
If the spring inside the bracket is broken broken an d the pin d oes not hold the ha nd le arm in position, position, either change the handle from any spares you may have, or note it on the refurbishment record on the ou tside tside of the case and Netley Netley Marsh will chan ge it. 6 Make sure the wooden handle is free from worm or splits and tur ns freely on the spin dle. If If it it is stiff apply some penetrating oil an d leave for a while.
(6) Hold Hold the reassembled reassembled unit unit in your left hand and en sure the whole m echanism echanism runs smo othly and e asily. asily.
4
[2] B - 1
13.1.2006
2
HANDLE MECHANISM 7
10 (7) See that the small hinged flap on th e rear drive drive arm turns back easily and is properly properly cushio ned.
(10) More modern machines have a fibre pad with a small metal plate and screw to hold it in p lace.
This flap locates between the spokes of the b alance wheel and engages the machine ready for use.
If the pad is missing or badly worn, replace it if you have any spares. Otherwise, Otherwise, note it on the refurbishm refurbishm ent record on the outside of the case an d Netley Marsh will will chan ge it. Put the refurbished handle mechanism with its fastening screw screw to on e side un til the rest of the refurbishment has been done.
8 (8) Older machines have a thin leather sleeve on the end of the hinged flap to cushion and silen silen ce the a ction. If the leath er is worn out or missing missing the mach ine will be n oisy. oisy.
9 (9) To re-cushion re-cushion the hinged hinged flap, flap, trim trim off any excess excess leathe r and press press a tight fittingsmall piece of plastic tubing over the arm.
[2] B- 2
2
13.1.2006
REFURBISHING REFURBISHING - BAL BALANCE WHEE WHEEL L: DISMANTL DISMANTLE E & CLEA CLEAN N
2
2
Standard Standard Spoked Whee ls: When engaged, the balance wheel transmits the power from the h and le (or (or treadle) to run the machine. The combined weight and spinning motion helps smooth out th e action. action. When disengaged disengaged from the m ain transmission, the balance wheel is used to drive drive the b obbin wind wind er. 4
1 (1) Slacken lacken the small pin screw screw in the face of the shiny knurled hub disc - known as the stop m otion screw. screw.
7
(4) Draw Draw the balance whe el off its spindle then clean and o il spindle and whee l bearing.
(7) ...or ...or,, if you you have have one, use a Gear Puller like the o ne illustrated above.
If the wheel is tight on the shaft, try easing it by libera libera lly lly app lying lying pen etrating oil. oil.
You m ay need to reverse reverse the arm s so the hooks are pointing outwards and can lock lock on the rim o f the balance wheel through the spokes.
If the outer rim of the balance wheel is is bad ly pitted or rusted, a replacement wheel may be the best solution.
Solid & Larger Size Whee ls: Machines with spoked balance wheels are designed for use with han dles and / or treadles. treadles.
5 (5) If the balan ce whe el is really stuck, place a block of wood beneath the needle bar. bar.
2
This prevents the machine from turning while you work the balance wheel free. Do not use excess excessiv ivee force because there is a dan ger of disrupting the timing.
8 (8) Some very early machines have balance wh eels with with a th ick rim like the one shown. This can sometimes preclude the opportunity of inter-changing handles from som e other later mod els. els.
Unscrew the the stop stop motion (2) Unscr screw hub disc.
6 3 (3) Remove and clean clean the odd shaped clutch washer.
(6) If the wheel is still still seized seized on the shaft, turning it slowly whilst tapping gently with a fibre fibre ma llet should dislodge it...
[2] C - 1
9
13.1.2006
2
REFU REFURBISHI RBISHING NG - BALA BALANCE WHEEL: HEEL: STOP STOP MOTION MOTION - RERE- ASSEMBLY SSEMBLY 2
Some machines are designed to be driven solely by a belt and have a solid balance wheel like the one shown. (9) Dismantle and draw draw a solid wheel o ff its its spindle in the same way as a spoked one. These solid balance wheels have a larger diameter flange for the bobbin winder to work on than the spoked wh eels. eels. We cannot therefore just substitute a spo ked wheel, as the bob bin winder winder cann ot be adjusted to engage with the spoked balance wheel.
All is not lost in this case, as we can use an y long base machine 15K, 15K, 66 or 201- for for a t read le base , releasing releasing a spoked ba lance wheel m achine for for conversion conversion to hand . Again, a few solid ba lance wh eels have an indented notch cut in them to allow allow a han dle to be fitfitted.
14
We do not recommend that this conversion conversion is attem pted on o ther m achines such as 99 and 185. 185.
(14) (14) Now Now the clamp stop m otion (or clutch) washer has been added and you can see how the two inside lugs fit into the two notch es at the end of the shaft. shaft. Notice Notice how these lugs bend ou tward ward from the bu shing. shing. This This is is important because it provides a creeping action action for tightening th e clutch. In other words, the clamp stop mo tion washer acts like like an ord inary spring washer except that it is not designed to lock lock into po sisition.
10 12 (10) Check if the bobbin winder attaches at the top of the machine. If so, the balance wheel and the bobbin winder can be chan ged ged as a pair. If you do not have spares, note it on the refurbishment record on th e outside of the case an d Netley Marsh Marsh will chan ge it.
(12) (12) The The p icture ab ove shows the Balance Wheel (stop motion) bushing on the end of the end of the driveshaft. What concerns us is the operation and ad justmen t of the clutch mechan ism ism which which is comm on to all the m achines we send.
If the lugs are pointed inward the re is no ‘give give’’ to t he washer at all. all. It It locks almost in stan tly an d is likely to work loose when the ma chine is working. working. Exact adjustment of the stop motion washer is an easy matter if the clutch is un derstood.
15 11 (11) In most cases you will find that the b obbin winder attaches attaches by screws at the side of the machine behind the balance wheel.
13 (13) Here we see the end of the bushing, projecting through the hu b of the balance wheel. Notice Notice particularly the notches at the end of the bushing.
[2] C - 2
(15) This picture shows the reverse side of the hub disc and the stop pin screw that threads through the h ole. ole.
13.1.2006
2
REFU REFURBISHI RBISHING NG - BALA BALANCE WHEEL: HEEL: STOP STOP MOTION MOTION - RERE- ASSEMBLY SSEMBLY 2
16
18
(16) (16) When th readed into p osition osition the en d o f the screw projects projects far enough through the hole so it can strike against the outside ear lugs.
(18) If, when the hub is screwed in to its maximum, it is still not tight enough - you will have to remove the clutch washer and turn it through 180 degrees. degrees.
When winding a bobbin it is desirable to have the balance wheel run free, and not turn the driveshaft which operates the machine.
The dotted lines show how by doin g this you you get six time s mo re movement between the pin and the ear lug which allows the thread of the hub screw to bite deeper an d increases the pressure. pressure.
Imagine Imagine you could see what was hap pen ing behind th e disc.. disc.... To help you understand, the action the following photos are m irror irror im ages. ages.
When you replace the stop motion screw, you can have no idea whether you have located the washer correctly. correctly. However, it will soon become obvious. If it isn' isn' t right, take off off the screw, screw, turn th e washer roun d 180 O and try again. again.
17
(17) The hub disc is unscrewed (anti-clockwise) releasing the pressure until the pin clicks against against an outer ear lug, stopp stopp ing the hu b from from u nd oing completely. completely. When the bobbin is wound, the operator turns the clamp stop hub screw clockwise and, in so doing, tightens tightens th e clutch.
19
(19) It is much easier to fit the washer and screw if you tip the machine up on to its its end.
The white lines added to photo (16), show where the tips of the projecting sprung lugs rub against against th e inside surface of the hu b screw. screw.
[2] C - 3
13.1.2006
BOBBIN BOBB IN WIND WINDER ER - TYPES TYPES & FUNCT FUN CTION ION
2
The bobbin winder is a separate unit screwed on to the machine, adjacent to th e balance wheel.
Thread Guide
Pressure Control Screw
Spring loaded, th e thread guide moves from from side to side in a sweeping movement.
Its fun fun ction is to wind a reserve of cotton evenly onto an empty bobb in and (in (in m ost cases) cases) spring release when when the b obb in is full. full. The most frequently seen type actually performs three tasks: (1) winding (2) evenly distributing (or guiding) the thread and (3) stopping wh en full. ull. In order to achieve this multitasking, the bobbin winder has three sets of com pon ents, springs and levers doing different jobs but all working working in un ison. ison.
2
Rubbe r Whe Whe el Presses Presses on the inside flange flange of the balance wheel.
Spindle Worm Stop Latch
Revolves Revolves with th e spindle, engages with the gear teeth and turn s the gear wheel. wheel.
Spring loaded to snap into working position and quick release release b ack to rest.
Cam Gear Wheel
Bobbin Con trol Lever Lever
Cam
This part of th e Stop Latch pu shes backwards as the bob bin fills fills up.
Attached und erneath (and revolving with) the gear wheel, the cam pushes against and m oves oves the thread laying laying guid e.
Spindle Shaft Holds the bobbin
There are three main types of bobbin winder. Before you start to dismantle one and work on it, you firstly firstly need to ide nt ify ify which type it is. And then familiarise yourself with h ow it works. TYPE A
2 (2) An empty bobbin is inserted on to the bobb in spindle spindle un til til the small pin pin in th e spindle shoulder locates locates in the h ole in in th e bobb in side plate.
4
(a) The rubb er wheel is pressed against against the balance wheel and ... ... (b) The stop latch comes to rest between the side plates of the bobb in and holds it in in p lace. lace.
1 (1) With With sm all variation s, TYPE TYPE A was installed on 66, 99 and 15K m odels over over a long period. It has a wind wind er, thread guide an d a release release m echan ism ism . It It is the one m ost frequen tly seen and is the most complicated. For this reason , it is really really useful to have an assembled spare exam exam ple to han d, so you you can refer refer to it as you work.
3 5 (3) When the spindle housing is pressed down, the stop latch snap s forward. forward. (4) With this action, two things happen:
[2] D - 1
(5) As the handle is turned the bobbin fills with cotton, the stop latch is forced upwards until it eventually spring releases back into its origina origina l
13.1.2006
BOBBIN BOBB IN WINDER - TYPES TYPES & FUNCT FUN CTION ION
2
When the handle is turned the worm on the spindle turns the thread guide gear wheel. This is fixed to a cam which pushes the thread laying laying guide guide t o on e side.
2
In its simplest form the bracket has two slots that the thread is taken taken through.
9
(9) The gear wh eel is retained by a central (eccentric) screw with a small square square lock nut a t the b ack. 6
(6) When the cam is at its maximum diameter the thread guide lever lever is pushed to th e right right
It is is a comm on m istake istake to rem ove ove the eccentric screw and gear wheel for cleaning not realising the adjustment between the worm and gear gear teeth mu st be set correctly on reassembly.
12
(12) (12) Ano Ano the r variation of th e ba se plate thread guide h as two small sprun g loaded loaded - tension wheels. wheels.
TYPE B
13
(13) These base plate thread guides can can b e m oved oved to th e right right - if the the bobbin winds too hea vily vily on the left left side - a nd vice vice versa, versa, then locked locked in p osition. osition.
7
(7) The guide is held against the elliptical cam by a spring, so when the cam rotates the guide returns with a sweeping action, distributing the cotton evenly along along the dru m of the bobbin.
10
(10) Type B has a winder and release release mechanism bu t no thread guide. It was fitted to 201s and later m od els of the 66, 99 & 15K. 15K.
There is also often a second cotton reel holder on the base p late for bob bin winding. It is im im portan t to clean th is area but be careful about oiling. Over oiling could negate the tension by allowing allowing the cotton to slip. TYPE C
8
(8) On some bobbin winders the cam is fixed behind the gear wheel (as shown here) but the principal is the sam e.
11
(11) This modification dispensed with with th e com plicated plicated th read laylaying devic devicee and introduced a base plate b racket. racket.
[2 ] D - 2
14
13.1.2006
BOBBIN BOBB IN WINDER - TYPES TYPES & FUNCT FUN CTION ION
2 TYPE C
(14) (14) This This simp le wind wind er - withou t threa d guide o r release - relies relies on the operator to stop when the bob bin is full. full. It uses the same brackets on the base plate to d eliver eliver the thread to the bobbin. When in use, the operator pushes the arm down on to th e balance wheel.
15
(15) (15) Make sure the screw h olding the arm is tight enough to keep the arm on the balance wheel. wheel. Apart from oiling, cleaning and checking the rubber ring, there should be no other problems. Type C has a spring fitted in the bobbin shaft which provides enough resistance to keep the bob bin in p lace while while wind wind ing. It was fitted to electric machines and recent m odels odels of the m anual ones.
[2 ] D - 3
2
13.1.2006
2
BOBBIN WINDER REFURBISHMENT The rubber wheel has to be in perfect condition and m u s t b e replaced if it is is hard an d cracked, or spon gy and loose loose on its rim rim .
2
What follows is a breakdown of the m ost comm only foun d faults, faults, of Type A a n d Type B, together with suggestions of how to rem edy them them :
Pin Badly Worn Worn
1 (1) Undo Undo the single single attachment attachment screw and rem rem ove the bobbin winder assembly from from the m achine.
Change the bobbin winder if you have an available spare, otherwise erwise m ake a note on the Netley refurbishment form.
4 (4) Clean all the components and lightly oil all the m oving parts.
Worm Gear does n ot e ngage with cam gear, gear, or won’t won’t turn.
This may b e all that is n ecessary. ecessary. Rem ove all traces of oil from from the drive wheel before replacing (or renewing) the rubber wheel. Oil rots rubber - therefore do not over-oil over-oil the m echan ism. 2 (2) Sometimes the the bobbin bobbin winder is held on by two screws which are only visible when the balance wheel is removed. If the bobbin winder appears to be in good working order, it is better to avoid tak ing it apart .
Also, lso, to a void th e wh eels slipp slipp ing, take a clean dry cloth and wipe the inside flange of the balance wheel where it comes into contact with with th e rubb er wheel. If there are n o prob lems you can re-attach re-attach the un it to the machine and m ove ove on to the n ext ext section. section. If the bobb in winder u nit is really really dirty in p laces you can’t can’t get t o, or if the components do not move smoothly or do n ot perform perform the fun ctions prop erly then you will will have to disman tle it. it.
FAULTS & SOLUTIONS 5
3 (3) Remove the rubber rubber wheel. wheel. This small rubber wheel on the end of the bobb in wind wind er spindle is pressed against the balance wheel to pick pick up the m omen tum when the h andle is is turned.
Som e problem s with with the bobb in winder may not become apparent until you have reassembled the handle and balance wheel and begun th e sewing sewing test procedure. Luckily, the most frequently found and complicated bobbin w i n d e r u n i t Type A , c a n b e removed ind epen den tly. tly.
[2] D - 4
(5) Loosen the nut at the the back of the ec centric screw.
Turn the screw until the worm gear engages with with the cam gear withou withou t bind ing. Re-tighten the nut, m aking sure sure th e scr screw ew d oesn’t m ove, and recheck.
13.1.2006
2
BOBBIN WINDER REFURBISHMENT
Thread guide does n ot follow the cam.
Put the thread guide back on top and locate the other end of the spring in the hole in the thread guide.
2
The rubber whee l is still not pressing pressing firmly enough against the balance wheel.
The thread thread guide must be turn ed an ticlockwise ticlockwise,, p ointin g well over over to th e left left - as it was (see 6) when you disman tled it. it. When you have replaced and tightened the screw, make sure the thread guide lever moves freely with the tension from the spring. Replace and adjust the cam as already explained (see 5).
The answer may be a m issi issing ng or damaged spring under the screw in in th e base of the guide.
The rubber wheel does not turn when pressing on the balance wheel.
10 (10) Try loo senin g the pressu pressu re screw and the pivot screw very slightly and levering the pressure arm upwards using a s crewdriver crewdriver
6 (6) First irst undo the cam screw screw and remove remove the screw, screw, nut, wheel an d washer. washer.
8 (8) Loosen the pressur pressuree control screw.
11
The rubber whee l stops turning before before the bobbin is full.
This should also be cured by getting the correct pressure between the rubber wheel and the balance wheel 7 9 (7) Now undo the thread thread guide guide screw screw and rem ove the guide lever and the spring.
When replacing the spring you will see that one small bent end locates in a pin hole in the lever lever hou sing sing the oth er end o f the spring has a sh ort tail.
(9) Re-tighten e-tighten the screw whilst whilst pressing the rubber wheel firmly against the balance wheel.
(11) With the pressure screw screw and the pivo t screw very slightly loosene d tap gently downwards on the pressure arm with a pun ch o r screwdriver. screwdriver.
The bobbin do es no t turn with the shaft.
You m ay need to repeat this
If the pin on the spindle
un til you get the ten sion sion between the t wo wheels just right right for easy turn ing action.
shoulder is okay (see previous page) the bobbin may not be engaging with it.
[2] D - 5
13.1.2006
2
BOBBIN WINDER REFURBISHMENT
This probably means the stop latch is not holding the bobbin close enough to the right end of the sha ft.
2
The winde r still does n ot lift off when the bo bbin is full. It may be that lifting spring is missing or not correctly fitted and you will need to dismantle th e Bracket Assem Assem bly. bly.
16
1 6 D e ta ta ch ch t he he l at at ch ch fr fro m t h e pressure arm.
12 (12) (12) Using a pair of pliers, pliers, bend the stop latch slightly slightly to the right.
The win der does no t lift off when the bobbin is full. This could be for one of two reasons:
Now replace any missing, worn or broken springs or parts and reassemb le. le.
14 14 Remove emove the pressu pressurre screw screw, , then release the pivot screw screw and detach the assembly from from the bracket. The whole assembly is actually pivoted pivoted an d sprun g at two two points. The m ain on e is the lifting lifting spring, located located in a hou sing sing at the end of the lifti lifting ng arm .
17 1 7 Re - co co n n ec ec t t he he l at at ch ch a nd nd the pressure arm with no tension in the spring. spring.
13
Hope fully fully, it m ay simp ly be -
As with the thread guide assembly, this spring also has the two end s ben t at right angles to locate locate in retaining holes.
The next next part is tricky tricky - bu t th is tip w ill make it a little easier: easier:
that with years of use - the stop latch has been bent backwards slight slight ly an d, if this is so, it is easily corrected . (13) (13) Bend the stop latch slightly slightly forward.
When an empty bobbin is slid on the shaft and the winder pushed down in the engaged position, there should only be a very small gap gap b etween th e stop latch and the bobb in core. core. This is to make sure the bobbin winder will snap off before the bob bin is over over-woun -woun d.
18 15 15 Detach Detach latc latch h and and pr pressur essure arm from from the lifting arm. arm.
[2] D - 6
1 8 Pl ac ac e th th iiss s ub ub as as se se m b ly ly o n the bracket and - just for now - put the pivotal screw through the arm and tighten.
13.1.2006
2
2
BOBBIN WINDER REFURBISHMENT As the comp lete unit is reassem reassem bled the long tail of the spring is pushed round to create create the pressure to release the winder when the b obbin is full fully y wound.
The spring can (If you’re lucky) be persuaded to fit inside the recess completely, making the rest of the assem bly easier. easier.
19
(19) Put the pressure pressure screw through through the slot in the arm and screw tightly tightly hom e into the bracket. 22
Here’s a rem inde r of the assem bled u nit (back view) view) to see the ultim ultim ate position of the spring tail resti resting ng against the ben d in the pressure pressure arm .
20 (20) Now, with the assembly held firmly firmly in place, remove the pivotal screw. screw.
At th is stage the sp ring tail comes to rest against the shou lder of the cutaway in the side of the d eep recess. recess. Sometimes the spring does not stay in the recess and prevents the screw tightening properly, but with patience and practice the whole assembly will rotate roun d th e pivotal screw again. again.
(22) Hold the two halves halves of the frame frame assembly together (against the pressure) and push the pivotal screw back through the frame an d screw into the bracket again.
The thread does n ot lay evenly on the bobbin.
21 (21) Pick up frame frame assembly and place spring spring into the deep recess - again locating the end of the spring in the hole.
First First check that the b obbin shaft is turning the cam and that the threa d guide is follow following ing the ca m smoothly.
If the se are wo rking prop erly, erly, it could be that the thread guide has been b ent so that it does not traverse the full width width .
[2] D - 7
23 (23) Using a pair of pliers, carefully bend th e thread guide so that it is centred between the cheeks of the bobbin.
16.3.2006
REFURBI REFURBIS SH M ENT - TOP TOP OF M ACH ACH I NE
2
2
Spool Pin
A
The hole (A) to the left of the cotton reel spindle should be oiled when the thread take up up arm arm is at its i ts lowe l owest st point. point.
99
1 (1) Make sure the cotton cotton reel reel holder (or spool spool pin ) is in the correct correct hole and and t ight. With the earlier machines one end of the spool pin is slightly tapered and push-fits into the retainin g hole. hole.
A
The hole (A) to the left of the cotton reel spindle should be oiled when the thread take up up arm arm is at its i ts lowe l owest st point. point.
They sometimes become loose but a few taps with a light hammer generally solves the problem. If the pin is still loose, roughen up t he tapered tapered end end w it h a file to m ake it stay tight.
66
A
The hole (A) nearest the bobbin winder should be oiled when the needle is at its lowest. (You can see the felt pad at the top of the connecting rod below the hole).
2 (2) On th e later 201s 201s,, like lik e the one above, the pin is threaded at one end and has a screwdri screwdri ver slot slot at the oth er. er.
15k
A The hole (A) immediately to the right of the cotton reel spindle should be oiled when the needle is at its ‘highest’ point.
201
Oil in g (Top (Top of Machi Machi ne) An elderly sewing machine that has not been properly refurbished and lubricated will run hard. In a hot dr y clim ate ate,, considerable considerable energy will be wasted using a machin e that doesn’ doesn’tt t urn eas easily besides shortening its future life and usefulness.
A The hole (A) immediately to the right of the cotton reel spindle should be oiled when the needle is at its ‘highest’ point.
[2] [2] E - 1
201
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REFURBI REFURBIS SH M ENT - TOP TOP OF M ACH ACH I NE
2
Like all all ot her m achi achi nery a sewing sewing machin e will not give satisfaction atisfaction if its working parts have become gumm ed or dry. dry. Oiling holes are provided above otherwise inaccessible moving parts where there are bearings and friction. All moving parts in contact must be covered with a film of oil and not allowed to become dr y. You should always use good quality sewing machine oil. Thicker, inferior oil will clog the bearings, prevent efficient working and cause rapid wear of the mechanism.
(4) (4) When When oiling, inse insert th e oil can can spout well well in to t he oil holes.
2
66
After oiling run the machine rapidly for a few moments and then wipe the top arm over over wit h a clean clean clot h.
Sti tch l ength sett in g The length of the stitch, and its easy regulation, is a crucial part of successful sewing. Fine material requires a fine needle & thread and a short stitch. Heavy material requires th e opposite. Abou Aboutt 18 sti sti tches tch es to the inch makes a suitable seam for ord in ary sewing. sewing. The visibl visibl e part part of stitch sett sett in g is the stitch control knob or lever on t he front of the machine. machine. There is also the mechanism inside. These two elements are dealt with here - first the control, then the mechanism model by model.
3
6 (6) Unscrew Unscrew t he kn ob as far as it will go, go, clean clean the knob and the th read. read. Put a couple couple of drops of oil on t he thread thread and screw screw it up again. again. The 66 and early earl y 99 99 models mod els use a screw crew to cont cont rol th e sti tch. Fully screwed crewed in for the lon ges gest sti tch, unscrewing the knob produces shorter stitches until the fabric remains stationary. The ability to reverse stitch was introduced on later 99s and gave ri se to the foll owing tw o types of control levers (7 & 8). This allowed the more accurate and faster faster sett sett in g of stitch length.
(3) Fir st m ake sure all all t he oili ng holes in the top of th e m achi achi ne are clean clean and n ot gumm ed up. A drop of oil injected properly in to each each oili ng hole is suffi cient do not over over oil . It is most important that each machine should be turned according to the instructions on the previous page - when oil is applied at point ‘A’. This allows the oil to drop directly on the mainshaft crank below which mi ght ot herwise be missed. missed.
15k 5 (5) Chec Check k t hat t he knob is free to t ur n and can eas easil il y be m oved oved up and d own. To alter the stitch length on the 15K machine, first loosen the screw then move upwards to increase or downwards to decrease; except on the 15K26 model when it operates in the opp osite way w ay.. When the required stitch length has been obtained, it can be set by tightenin g the knob.
4
[2] [2] E - 2
7
99
(7) At first this consisted of a simple lever and a scale in sti tches per per in ch. If the lever is moved above the horizontal lin e, the machine will ‘Back ‘Back Tack Tack’’ or sti tch backwards. This is used used to ‘sea ‘seal’l’ t he end end of seam eam s so so t hat t hey cannot loosen (not for long runs). This in turn was modified as we show overleaf...
16.3.2006
REFURBI REFURBIS SH M ENT - TOP TOP OF M ACH ACH I NE
2
99
In th e cas case e of the th e sim sim ple pl e lever lever (7), the indicator plate can be removed by turning it by 900 when i t w il l slide past past t he lever lever.. In the second case (8), there is a screw inside the knob. Unscrewing this will remove the knob.
8
Red dot d ot
Then move the lever lever up or down unt il the red dot is at at t he des desired sti tch sett sett in g. Now turn the thumbnut inward until it touches the indicator plate (do not over-tighten as this can cause cause the sett sett in g to change ch ange). ). The machine i s now set set to sti tch the desired number of stitches per inch in a forward forward direction. For ‘Back Tackin Tackin g’, raise r aise the th e lever to t he upper end end of the indi cator cator plate. The machine will now stitch in a reverse direction, making it easy to fasten the ends of t he seams. seams.
99 (9) If th e indi cator cator plates or levers levers need cleaning, they can be removed by undoing the two retain in g screws screws..
.
12
(12) This picture shows the components of the 201 stitch length settin settin g contr ol.
10
(10) (10) The 201 201 in trod uced a fur ther vari vari ation. A lever lever wit h the sti tch length b eing set set by looseni looseni ng th e thumbscrew at the left and slid in g it i n th e curved slot. slot.
11
(11) (11) The plate under t he ind icator scale revolves with wi th it , blocki ng off the lower lower part and t he upper part of the t he lever lever slot as it is lif ted.
9
Thumb screw hole
201
(8) The scale scale is now on th e left, left , and the red dot in the slot in dicates th e settin settin g from 6 to 30 sti tches per in ch. Chec Check k th at th e lever moves freely from top to bottom of the slot. slot. To regulate the length of the stit ch, first turn t he thum b nut on the lever anticlockwise away from the stit stit ch ind icator icator plate as as far as necessary. necessary.
2
Tightening the th um bscre bscrew w th en locks the stitch at that maximum length, whi le again again allowi ng back stitching to be done at a flick of th e lever. lever. Check Check th at tthe he lever lever m oves oves freely freely from t op to bottom of the slot. slot. If the indicator plates or levers need cleaning, they can be removed by undoing the two retain in g screws screws..
[2] [2] E - 3
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REFURBI REFURBIS SH M ENT - TOP TOP OF M ACH ACH I NE
2 Sti tch Length Length Mechani Mechani sm
As the stitch control screw or lever is moved, the slide turns, changing the fulcrum point and varying the movement at the base base of the th e rod.
2
66
As the whole of this mechanism is enclosed in the machine, it nor mally n eeds eeds litt le cleaning. cleaning.
16
Model di fferences fferences
15k
13
14
(13) In all models, the stitch length control levers or screws connect connect with a mechanis mechanism m in the base base of the th e machin e.
(14) Thi Thi s shows th e locati locati ng screw and and washer washer u nder th e balance wheel. wheel. Check heck t hat th e was washer i s in tact.
There is very little difference between models in this area, so th e 66 is used as an example. examp le.
The washer has three projecting lugs. These, with its shape, provide some friction which prevents the stitch length wandering from its setting, parti cularly wit h th e leve leverr typ es. es.
All the internal components of the stitch length control are shown in the above above mockup.
17 (17) On the 15K there is an arm projecting into the machine at the bottom of the back opening. The stitch length mechanism is attached to this, instead of the side of the m achi achi ne.
Sti tch Contr ol Par Par ts:
201 Locating screw and thrust washer - located under balance wheel.
A:
B:
Sli de. Rotat Rotates es on A, under th e control of C, the Stitch length knob. Note the pin on the slide engaging enga ging wi th th e groove groove on C. Stitch Length Screw or lever on ot her models. models.
C:
D: E:
Roller whi ch fit s in to t he slid slid e.
Connecti ng rod. rod . The yoke at the top fits into a crank which ‘waggles’ the rod. The roller provides a fulcr um . The bott om end is fixed to th e feed feed dog arm arm as shown i n t he inset. inset.
18
15
(15) The bes best view of th e mechanism is obtained obtained fr om t he back back of t he machin e. Loosen Loosen t he screw screw on t he cove coverr p late to m ake it visible. (16) Put a drop of oi l on th e sli de and t he locati ng screw. screw.
[2] [2] E - 4
(18) On some 201’s 201’s onl y (t he later lat er ones with the brown colouring) there is an oiling hole inside the back inspection cover just below th e gea gearr w heel. Give it a drop of oil and tur n th e balance wheel a few times to lubricate. Note: Note: 99 Mode Models ls do not have a back openin g. Oilin g mu st be done from th e openin openin g under under t he balance wheel.
2.3.2006
U PP PPE ER TENSI TENSI ON ME M ECHANI SM - (66 & 99 m odels odel s)
2
The principals of thread tension have already already been covered covered in th e section on ‘How a Sewing M achine achin e Works’ Works’ page [1] E - 4.
2
Ear Ear l y Type Type (66 & 99)
(A)
To avoid snapping the thread as it is pulled ti ght at the end of the stitch form ation ( see see page page [1] E - 2) it is passed through the thread take up spring (A) which ‘takes-up' or cushions the strain.
(B)
The tension stu d (B) has a hole drilled through it endwise, so th e tension releas release pin (C), can can slide within i t. 1 (1) The majority of tension adjustments for changes in thread and fabric thickness or stitch length are made through the upper tension m echanism. echanism.
(C)
The thread passes between the tension discs (D & E). These discs are pressed together by the tension release disc (F) as pressure pressure is exe exert rt ed on i t by t he beehive shaped shaped spri ng (G).
(D) (D )
(E)
The amount of pressure is regulated by turning the knurled knurled thum bnut (H). When the presser bar lever is lifted, the release pin is made to slide through the stud stud unti l the end of the pin presses against the cross-piece bar in th e cent cent re of th e was washer (F).
Bobbin thread tension screw
2
(2) Once set, the lower bobbin tension should not need to be altered altered for n orm al operation operation s. How you set set the tension correctly is something we discuss in section [2] J when we look at performing a sewing test. Here we deal deal with refurbi shm ent onl y. There are are basicall basicall y only onl y two t ypes of t ension ension m echani echanis sm s. However, However, because they have constantly improved over the 100 years or so, there are now variations for each model. We start this section by explaining these two types, and then cover the work involved - model by model starti starti ng with the 66/ 66/ 99. 99. For the 15K turn to page [2] F - 8 and for th e 201 201 see see page [2] F - 10
(F)
(G)
This relieves the pressure on th e spr spr in g. See th e diagram on page [1] E - 4.
(H )
Later Di al Type Type (66 & 99) (C) (C)
(B)
(A) (D) (E) (E) (F) (G) (G)
[I ] [ J] (H)
The tension release disc (F) has changed in shape. It now h ouses ouses th e spr in g (G) (G) and has h as a gui gui de on t op as a visual visual aid t o t ension ension settin g. Two new components have been added; a stop stop washer washer [I ] and a dial [ J]. The stop washer has a protruding tail which makes contact with a ridge inside the dial preventing it from making more than than one revolution revolution - so the thum bnut (H) cannot be screwed screwed off t he stu stu d or ti ghtened exces excessively. The thumbn ut (H ) now has a pin on the back back face face which fits into one of the holes in a circular pattern on the tension tension dial ( J). This means that the di al revolves revolves with the thu mb nut as it i s screwed crewed in or out .
[2] [2] F - 1
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2
UPPER UPPER TENS TENSII ON ME M ECH ANISM ANISM - (66 & 99 m odels odel s)
(9) (9) Fir st scre screw w the thumbnu t back back on the stud stud a few few tu rn s and t hen u se a screwdr iver to u ndo t he stud stud and remove remove th e stu d and spr spr in g.
Earl y Type Type (66 & 99)
6
3
(6) Use Use pliers on t he end end of t he arm s ( j j ust before befor e t he thread th read gent ly bend th em starts ) to gent back back to a par par allel posit posit ion .
(3) This pict ure shows th e take up spring and tension stud which is used used with the 66/ 66/ 99 sim ple tension tension mechanism.
10 (10)At th is stage stage,, check check that t he reces recessed shou shou ld ers of t he tension tension mechani mechani sm housing are in th e ‘clock han ds’ ds’ positi positi on equiva equivalent lent to aroun d 25 m in ut es to 11. 7 (7) (7) ...o ...or, r, leve leverr gently with gently with a screwdri ver ver if th e ar ar m s have been bee n pin ched ched t oge ogeth th er.
Adjust if required - by first releasing the grub screw under the arm and then rotating the tension mechanism housing to the required position.
4 (4) (4) Remove move thumbnut and take off t he components components down down t o th e tension di scs. cs.
11 8 (8) (8) Chec heck th e condition of t he take up spr spr in g.
(11 (11) On the early early 66 and and 99 models the end of the take-up spring is held tight between the shoul der of t he tension tension stud and the mechanism housing when the stud is screwed fully home.
This Thi s deli delicate cate part i s eas easilily y damag dam aged ed - if it has little resistance, or is broken broken or bent, bent, then then it m ust ust be replaced. 5
(5) Clean lean or r eplace place the discs discs if th ey are rusty or grooved. grooved. Next check the condition of the stud. Sometimes the two pronged arm s have been splayed spl ayed by careless careless use of a screwdriver which makes the thumbnut difficult to turn.
(12) Fit th e new spr spr in g on th e tension tension stud. Hold th e spr ing at about 2 o’clock o’clock wh il e you you screw the tension tension stud t ight .
9
[2] [2] F - 2
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2
2
UPPER UPPER TENS TENSII ON ME M ECH ANISM ANISM - (66 & 99 m odels odel s) Next refit the two discs facing each each other t hus: )( )( , the domed pressure pressure plate dom e towards toward s you - and l astl astl y the conical spri spri ng and thumbnut.
(18)I f t he tension tension does not release, release, rem ove th e face face plate and check in side. End of tension release release pi n
Screw in the thumbnut for a few turns and leave further adjustment unt il test test ti me.
13 (13) When the stu stu d is tight , m ake sur e th e tension spr spr in g is sti ll at 2 0’cloc 0’clock, k, then gentl gentl y push push i t anti clockwise clockwise unt il it dr ops int o the slot. slot.
19
16 (16) The 66/ 66/ 99 tension pi ns have nothing to hold them in place and often get lost. A suitable replacement can be cut from a long panel pin , or the tail of a pop ri vet. vet. It shoul d be exac exactly tly 1” long.
Return spring
(19) Make sure that when the presser foot lever is raised, the tension release lever at the back of t he face cavit cavit y m oves oves across across to push the tension release pin. Picture (18) shows the early type of release lever mechanism which is partly obscured by the presser presser bar and t he needle bar. Type A: A: Early Early model with pin location location
14 (14) Here the housing and the spr in g are are see seen n in t he correct correct rest rest positi positi on pr ior to sewing. sewing. 20
17
15
(17)When the reassembly is complete check that when you lift the presser foot release arm the tension is released allowing the thread to pull through easily between th e dished plates. plates.
(20) In these early models, the releas release e lever lever fit s into a slot slot in the bott om of th e face face cavity, cavity, held held i n wit h a pin . This slot clogs wit h old oil that has has drained drained into it . Type B: B: Later Later mod el with shoul dered screw fi xing.
(15)Deflect th e spr in g and check that i t r etur ns to the corr corr ect position. When the machine is being used the spring will be deflected to about 9 o’clock. When you come to reassembly, remember to locate the pin in side t he stud stud .
21
18
End of t ens ension ion release releas e pin pi n
[2] [2] F - 3
(21) The later typ e of release lever is held in place wit h a shouldered shouldered screw - so that the screw can be tightened while allowing free movement t o t he lever. lever.
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U PP PPE ER TENSI TENSI ON ME M ECHANI SM - (66 & 99 m odels odel s)
In both cases the lever must move freely and easily. If it does not, then work through the following sequence:
(24) A simple adjustment tool can be made to tackle th is task task in sit u by cutti ng a 3/ 32nd 32nd of an inch wi de slot, slot, 1/ 8th of an inch deep dee p i n a piec pi ece e of 5/ 16th 16th steel rod.
Grubscrew locates in groove
Rem edial Acti Acti on: Type A If you are working on an early model and the tension release lever is stiff or unmoveable, squirt in some penetrating oil, leave leave and and tr y again again l ater .
22
This much protudes from the side of the machine
If still in trouble, you might li ke to note it for Netley Marsh to deal with. The lever can be removed but it is difficult for t he following reasons:
(22) The grub screw shou shou ld l ocate in the circular groove in the barrel. The end of the barrel prot ru des about 3/ 32" 32" or 2.5 2.5 mm from the side side of the machin e.
The pi n is diffi cult t o remove. remove.
If t hi s is OK, OK, it i s probable that the release lever has become bent.
You will probably have to remove the presser bar and needle nee dle bar to clean clean ou t t he slot. slot.
Type A
Then you wi ll n eed eed to re-adju re-adju st the needle bar bar h eight. eight. Rem edial Acti Acti on: Type B On th e later later m odel, if t he lever lever doesn' doesn' t m ove freely freely and eas easil y, make sure the shoulder part of the screw screw is sit sit ti ng correctly in th e reces recessed sed ri m of th e hol e in th e lever. lever. Rem edial Acti Acti on: Both t ypes ypes If th e l ever ver m oves oves fre fr eel y and easi asi l y wi th a sc screwdr rewdr iver, iver, but doe does s not move th e pi n, check check th e foll owin g: The screw fasteni fasteni ng th e presser presser foot foo t releas release lever lever is ti ght. For Type B, the shouldered pivot al scre screw w hold in g the tension releas release lever lever i s ti ght. The tension release lever moves when pu shed wit h a screwdriver.
2
Type B
23 (23)Careful (23)Careful ly bend t he leve lever a lit tl e so that it can can m ake contac contactt wi th t he pin at t he point indi cated. cated. This is relatively easy with type (B) as it has a horizontal bar which makes contact with the pin, and the lever can be unscrewed and wriggled out of the machine for attention. With Wit h type t ype (A) (A) check that t he lever lever contacts squarely with the pi n. It may be that bending it slightly away from you or towards you will do the trick. 24
If th e leve lever i s moving OK, OK, but i t i s not cont cont acti acti ng the pi n: Check that the barrel holding the tension assembly is fitting correctl correctl y in t he machine.
[2] [2] F - 4
If this is not an option for you, then it means clearing the presser presser bar and needle bar out of the way to remove the lever - or leaving leaving it for Netley to correct. correct. If i t t he tension tension lever lever n eeds eeds to be bent towards or away from the pin, do not be tempted to use a screwdriver pressing against the needle bar for leverage leverage.. In all cases you must make sure that w hen th e pres presser bar lift er is down, the tension release lever does not conti nue to p ress ress on t he pin , as as thi s wil l stop tension.
2.3.2006
2
2
UPPER UPPER TENS TENSII ON ME M ECH ANISM ANISM - (66 & 99 m odels odel s) Di al Type Type (66 & 99)
The tension stud and spring are changed changed from the early early type. 1
(C) Becaus Because e th e tension spr in g is enclosed, nclosed, th e un it can can usually be cleane cleaned d with a soft soft br ush, ush, and passing a cloth between the tension tension discs discs. If very very di rt y, take aparr t as descri apa descri bed in [2].
heck that, with the pr esser (D) (D) Check foot leve lever down, when when t he thum bnut is tur ned the tens tension ion can be tur ned up to 10 and and down to 0.
The spring’s int ernal tail slides over one of the splines on the stud stud
4 (4)Undo (4)Undo the thu mbn ut and remove all t he comp comp onents down t o th e tension di scs
(1) The The end end of t he take up spri ng fits into the splines on the tension stud. The stud is a push fit in to t he barrel, barrel, held by a screw screw.. To refurbish the ‘Dial Type’ tension mechanism work your way through steps A to D in the following Flow Chart. If you encounter a problem follow the relevant numbered symbol to find t he solution solution .
2 (2) The thumbnut should stop turning at position 0, as shown above. Remedial Measur Measur es 5 1
No problem work down through A Check tension release B Check take up spring C Check cleanliness D Check thumbnut movement
(3) (3) Turn t he thumbnut antianticlockwis clockwise e unti l it stops then pr ess ess in th e dial to di senga ngage ge the pin i n th e back back of th e thum bnut from the dial. dial.
Problem move on to: 1
If you have a problem with the tension releasing make the same checks as described for the sim pl e type on pages [2] F - 3 & 4
2
Disassemble
(5) Now Now sli sli de out t he take take up spri ng,t urn it to 1 o’c o’cloc lock, k, and replace it .
2
2
3
If you have a problem with the positi positi oning of the tension tension sprin g - or pif the tension tension mechanis mechanism m is very very dir ty - you will need need to di sasse assem m ble the un it as follows: fol lows:
6 (6)Latch (6)Latch t he take up spr spr in g at at 11 o’clock o’clock again again .
(A) Raise the presser foot release lever lever and check check t hat t he tension tension i s released. released. (B) Check Check that t he take up spri ng is in good good condition. Pull it gen t l y f o r w ar ar d . T h e sp r i n g should come round to approxim ate ately ly 1 0’c 0’clock. lock. Retur n it to it s position.
7
3
[2] [2] F - 5
(7) Test t hat t here is now some some resistance resistance to m oving it to 9 o’clock.
2.3.2006
2
2
UPPER UPPER TENS TENSII ON ME M ECH ANISM ANISM - (66 & 99 m odels odel s)
If there is a problem, the splines on the tension stud have probably come loose from the stud. tu d. I f t his hi s is the cas case, th ere is no alternative except to change the tension stud. Rebu Rebu i ld and Reset eset 3
If the th e spr sprin in g is okay - or you have had to disassemble in order to reset the dial - you can begin to replace the components as follows: The presser foot release lever should be down before you start these rebuilding steps:
10 (10)Replace (10)Replace th e th um bnu t a few tu rn s; use a screwdri ver ver to r eposit posit ion the tension tension stud and retighten retighten t he retain in g screw screw
13 (13) Now Now fit th e tension tension spr in g and stop washer washer as shown ..
14
11 8 (8) The tension stud should be positioned in the barrel so that the slot between the prongs is horizontal. (This (This allows the dial sett i ng to be at t he top )
(14)Place th e nu m bered bered dial on the stud, stud, with t he number number 2 uppermost.
(11) Sli Sli de the t ake up spri ng over over th e tension tension stu d at about 1 o’cloc o’clock, k, latch i nto the correct correct posit posit ion at 11 o’clock o’clock - as shown on p revio us page. page.
9
15
12
(9) (9) If t he stud stud i s not positi positi one oned d hor izontally,un do the retainin g screw crew located located in side th e head.
(12) Repl Repl ace th e tension di scs wit h th e dom ed sides togeth toge th er )(. Repl ace ace th e tension tension releas release washer, washer, wit h th e flat side towards th e machine, and the dial sett in g mark at t he top.
[2] [2] F - 6
(15)Push (15)Push t he dial towards th e machin e to comp ress ress th e spr in g. Screw crew on t he thum b -nut and carefully carefully guide the pin on the back back of the thum bnut in to one of the holes on t he dial. Turn t he thu mbn ut anti clockwise. clockwise. The dial should stop at 0. If not, turn it back to 2, press the dial again again and scre screw w t he thum bnut in further, guiding the pin in to a hole further round the dial. Repeat epeat un ti l t he dial stops on 0.
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U PP PPE ER TENSI TENSI ON ME M ECHANI SM - (66 & 99 m odels odel s)
j ust be At this point there should just zero zero t ension ension on t he threa thr ead. d. Adjust this by pressing in the dial (without turning it) and and turn the thu mb nut (clockwise (clockwise to i ncreas ncrease the pressure or anticlockwise to decrease) locating the pin in the hole adjacent to the one it was previously in. Repeat this until you have have it r ight.
Check that the dial will now revolve through a complete clockwise turn, stopping on 9. Turn the dial to 5, ready to test the sti sti tchi ng later. later. Finally, test that the tension releases releases wh en t he press p resser er releas r elease e lever is raised. If not, the corrective procedure is the same as for the simpler type covered earlier.
[2] [2] F - 7
2
2.3.2006
UPPE UPPER TENS TENSII ON M ECH ANISM ANISM - (15K m odel)
2
2
(7) Sli de the take up spri spri ng ove over the tension tension stud, stud, maki ng sure the tail of th e spr spr ing is located located in th e groove in th e stud.
15K
4
1
(4) The tension release pin is flattened at the end that presses against the pressure release disc.
(1) The components of the 15K model tension mechanism are assembled partly within their own housing located located on t he front of t he face plate.
8 (8) Push the tension stud into th e slee sleeve ve m akin g sur sur e it i s ful ly home.. Turn t he stud until the home take up spr in g is at at 5 0’clock. 0’clock. 5 (5) The remaining components are the sam sam e as th e basic basic 66/ 99. 99.
2 9
(2) The sleeve (seen here removed from the housing) is adjustable so that the sweep of the take up spring can be regulated.
6
(9) (9) Inse Insert and tighten tighten th e locating screw which holds it in place.
(6) To re-as re-assem ble, place th e sleeve leeve back in th e hou sin g, wit h th e cutout end facin facin g towards towards you, and r otate otated d towards towards the middl e of of t he face plate.
3
10
(3) The end end of t he take-up take-up spri ng fits into a groove on the spline of the tension stud.
(10)Push (10)Push t he take up spri ng roun d ant ant i clockwise clockwise unt il i t drops int o the cutout cutout i n th e sleeve
The locating end of the shaft is smooth and not threade threaded d li ke the 66. It ‘push fits’ into the hole in the base of the housing.
7
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2.3.2006
2
UPPE UPPER TENS TENSII ON M ECH ANISM ANISM - (15K m odel)
11 (11)Now r otate t he slee sleeve ve ant ant i clockwise clockwise unt il the take up spri ng arm arm is hori zontal. Insert Insert and tighten the hou sin g screw. screw.
16
14 (14) When the faceplate is reattached the end of the tension pin is pushed backwards (by the pressure of the tension spring) into the indent in the presser lever lever arm .
12 (12)r e-ass -assem ble t he oth er comp onent s as covered covered earli er i n th e sim ple 66/99 66/99 section.
15 (15) When the arm is raised the pin is pushed pushed forwards out of the indent and pushes back on the tension release plate which releases releases th e pressure pressure between b etween t he two tw o tension di scs. cs.
1
(13) (13) Make sure, when the m echani echani sm is reass reassembl ed, the rounded end end of t he pr ess essur e release release pi n prot ru des des sli ghtl y thr oug ough h th e back back of th e cas casin in g.
(16) (16) Undo the grub screw screw holdin g th e secur ecur in g pi n i n pl ace ace and m ake sur sure e the pres pr ess ser releas r elease e leve lever is held held f ir ml y in place place.
17
Remedial Measur Measur es
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2
If the tension does not release, check check that the face plate is fit ti ng close up to the face, with no debris inside it and that it has been fastened securely.
2
If th e releas release e lever lever wobbl w obbl es about - read on...
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(17) (17) Usin Usin g a punch, gent ly tap th e end of t he releas release e pi n un ti l the leve leverr is held firm ly. If t oo ti ght , tap the other end end of the pin . Finally retighten th e gru b screw. screw.
2.3..2006
UPPER UPPER TENSI TENSI ON MEC M ECH H ANIS ANI SM - (201)
2
2
201 (e (earl arl y ver ver si on on))
A B C
Tension pin wit h fl at end end Tension stud Take up spri ng 201 type ty pe
D E F
Tension washers washers Posit osit ioni ng plate joined t o rear rear tension hou sin g Tension ensio n release washer washer
G H I
Tension ension spri ng Front tension tension spri ng housing housing Thumbnut
(1) The parts shown above comprise yet another variation on the dial-up tension mechanism which was introduced with the early 201s. The tension tension sprin pr in g is enclose enclosed d in a housing, so that as the thumbnut is tightened, the two halves of the housing telescope. This allows for a simple bar and scale measure of the tension applied to be incorporated whi ch can can be see seen n i n t he pict ure.
2 (2) Check heck t he take take up spr spr ing is in good good condit condit ion and spr in gs back back to i ts posit posit ion when deflected.
1 3 (1) (1) Clean lean the unit with a soft soft br ush and and between between t he tension di scs wit h a cloth.
(3) If t he spr ing nee needs mor e - or less less - t ension, nsion, undo t he fasteni fasteni ng screw screw in sid e th e head hea d and tur n t he tens tension ion stu d wi th a screwdri screwdri ver. ver.
[2] [2] F - 10
4 (4) If t he spr spr ing needs needs changing changing or th e unit is very very dir ty, ty, undo th e tension stu stu d fasteni fasteni ng screw, crew, remove th e un it and take it apart .
5 (5) To re-ass re-assembl e th is typ e of early ver ver sion fi rst pl ace ace th e rear rear tension h ousing (E) (E) face face down on th e bench, bench, with t he loc locatin g arm arm in t he air.
2.3..2006
2
2
UPPER UPPER TENSI TENSI ON MEC M ECH H ANIS ANI SM - (201)
This is actu actu ally t wo p arts, the rear rear tension housing and the positi onin g plate. plate.
(8) Holdin g the tension tension releas release e pin in t he tension tension stu stu d with a sm all screwdri screwdri ver, ver, place th e tension tension stud int o the assembly. You m ay need need t o rot ate it to pass pass the tension release washer but the th e worst i s ove over. r.
12 (12)M ake sur sur e the take up spr in g is wit hin the cutout cutout and check check that it spr ings back back to t hi s posit posit ion w hen deflected.
6 (6) Put t he tensio tensio n r eleas elease washer washer (F) in to t he rear rear tension tension housin housin g, domed sid e down .
9 (9) (9) Pick the unit up holding holding it by th e tension tension hou sin g. Revers everse e it whil e you you add the tension tension spri ng and and t he front tension tension housing
13
7 (7) (7) Now plac place the two tens tension ion washers washers (D) on t op and sli de th e end end of th e tension tension release release spr spr in g betw betw een een t he part s of th e rear tension tension housing housing in the area area of the arrow in pictur e (6). (6).
(13)I f i t n eeds m ore - or less less tension, tension, tur n the tension tension stu d wit h a scre screwdr wdr iver, iver, th en ti ghten the holdi ng screw screw in sid e th e face. face. 10 (10)Til t t hi s so you can can get get t he tension tension m arker bar bar i nto t he slot in the rear rear tension tension housing. Screw on the thum bnut and the unit is complete.
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8
(11)In (11)In sert the unit i nto th e machine machine arm, loca locating th e guide tail i n t he small small hole above the th e housin hou sing g recess recess..
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2.3..2006
2
2
UPPER UPPER TENSI TENSI ON MEC M ECH H ANIS ANI SM - (201)
To start reassembly, first make sure the tension release pin is in place in the stud stud .
201 Modern Moder n Types
Spring tail Tension plates
3 1 (1) If the unit looks in good condition, clean the components with a soft brush to remove fluff and surface dirt. Then, with the tension released, clean between the tension disks with a soft cloth.
(3) (3) Now remov remove e the thumb nut and dial, stop w asher, asher, tension tension spri ng and and indi cator cator disc. disc. A
Circular loop
5
Thread guard tail
(5) (5) Place lace the two tens tension ion plates plates with their flat th readreadbearr in g sid es to geth bea geth er th en pass pass th e circul ar loop of t he spr in g under under the th read read guard wit h t he coils coils of the spr in g above above..
B
Check that the take up spring is in good condition. The spring on a type 201 differs from all the othe oth er m achin es becaus because e i t pul p ul l s i n the opposite direction. With tension off, lift the spring off its rest. It should slip round anticlockwise to roughly 6 o’clock. o’clock. If not th e mechanism wi ll have to b e disas disassembl ed.
4 (4) It is not necessary to remove the stud from the machine arm (as seen here) to disassemble the thread tension - but it does help to show it for the purpose of illustration. However, check that the stud is set with the slot horizontal so that the pointer for the stitch setting can be at the top of the machine.
2 (2) (2) To disa disassemble, tur n the thu mb nu t anti-clockwise anti-clockwise unti l t he numeral numeral 0 on t he nu m bered bered dial stops opposite th e centr centr e lin es betwee between pl us and and m in us. Next, press in the dial to disenga disengage ge the pi n i n t he back back th e thumb nut from t he dial.
6 (6) (6)
Guide the tens tension ion disc disc ass assembl y on t o th e stu d so that the exte extension nsion of t he th read guard guard enters the hole in th e machine arm arm .
You can see that the 201 has two differentiating features compared with the other m ode odels ls:: A: The additi on of a t hread hread guard plate with a tail at the top which locates locates in to a hole in t he machine arm. B: The opposing end end of t he spri spri ng has a circular loop which hooks over over t he front end of the stud stud . In order to have the necessary pretension, the take up spring has to be guided on to the stud with its loop in a vertica verticall position .
[2] [2] F - 12
7 (7) (7) Replace place the indica indicator wit h th e large open side facin facin g th e end of t he stu stu d so th at the plus and min us mark s will be at t he top (with (with the mi nus sign sign at t he left). left).
2.3..2006
2
UPPER UPPER TENSI TENSI ON MEC M ECH H ANIS ANI SM - (201) This ridge is for the stop washer hook to engage against which prevents the whole mechanism from coming unscrewed when the thumb nut is undone to its full extent. xtent.
8
hole adjacent to the one it was previously in. Repeat this until you have have it r ight. Check Check that t he dial t urn s toge together ther with the thumb nut through a complete revolution clockwise stopping on 9, providing a full range of tensions from light to heavy hea vy.. Then Then tur n t he dial b ack ack t o 5, ready to test test t he sti sti tchin tch in g later. Finally, test that the tension releases releases when wh en t he p resser resser releas r elease e lever is raised. If not, the corrective procedure is the same as for the simpler type covered earlier.
(8) (8) Inse Insert the remaining remaining pa parts. rts. Hold the parts thus assembled against the shoulder of the stud then inset the tension spring in the indicator with the first (half) coil of the spring straddling the lower half of t he stud stud . Then guide th e stop stop washer washer on to the stud so that the little hooked beak is at th e top.
2
11 (11)Next (11)Next p lace th e num bered bered dial on the stud stud so th at nu m er al 2 is opposite the stop washer washer h ook.
The take up spring should be resting horizontally, to fine tune it an adjustm adjustm ent plate is provided which regulates the distance the end of the spring travels as it m akes akes it s arc. arc. Spr in g rest rest projection arm
Adjustment screw 12
9 (9) If the spring and stop washer are in the correct position, the little hook will clear the first (half ) coil of the tension tension spri spri ng.
(12)Now push push t he dial to comp ress ress th e spr in g so th at the thumb n ut can can be tur ned o on n to t he stud. stud. Carefully guide the pin on the thumb nut into one of the holes of the num bered bered dial. Turn the thum bnut anti clockwis clockwise e. The dial should stop at 0. If not, turn it back to 2, press the dial again again and scre screw w th e thum bnu t i n further, guiding the pin in to a hole further round the dial. Repe epeat at un ti l t he dial stops on 0.
10 (10) (10) If you look i nside nside the num bered bered indicator dial you wi ll see a sm sm all r idge dir ectly below below n um eral 0.
At this point there should just j ust be zero zero t ension ension on t he threa thr ead. d. Adju Adju st this by pressing in the dial (without turning it) and and turn the thumbnut clockwise (to increase th e pressure pressure and anti clockwi se to decrea decreas s it ) locating the pin in th e
[2] [2] F - 13
13 (13)Loosen (13)Loosen adjustm ent screw and reposit reposit ion the take-up spr in g adjustment adjustment plate if requir ed t o raise or lower the projecti projecti on arm on whi ch th e spr spr in g res rests.
2.3.2006
THE TH E H EAD EAD
2 Particularly bad areas for an accumulation accumulation of gummed oil and flu ff are inside the Lower Lower Bobbin housing and i nside the Head. Head. The Head is often worse because it is less less frequent ly op ened and seen. seen.
2
Presser Presser Bar Regulating Thumb Screw
each of these and also on all other moving joints. Do not overoil overoil , as the surplu s oil can r un down t he needle needle bar, spoil in g the workpiece. Presser Bar Spring Bracket Screw
3 (3) (3) Make Make sure sure the thread thread of the Press Pressur e Bar Regul egul ati ng Thum b Scre Screw w i s oil ed and th e screw is eas easy y to t ur n. On t he 15K, 15K, 66 & 201 201 you wi ll see that the the regulating thumb screw is hol low or sea sealed led wit h a fibre plug. You should apply a couple of of drops of oil either int o the hole or onto t he plug.
Cover plate hole
5
(5) (5) When When lo lowe were red, d, make sure th e slot in th e foot does not foul th e cove coverr plate hol e. A swivel adjustment of the presser bar and presser foot can be achieved by loosening the spr in g bracket screw. screw.
1 (1) Fir st loose loosen th e hea head d scre screw w (if t here is one), one), then un screw the thu m b screw screw and li ft of f th e face pl ate ate..
6
Presser Bar
Needle Bar
4 (4) (4) Oil all the moving moving parts parts as as in dicated by the black black arrows.
2 (2) (2) Thoroughly Thoroughly cle clea an in side the head cavity.
As you can see from the illustration, most of the moving parts are associated with the levers that convert the rotating movement of the drive shaft into the up and down movement of th e needl needle e bar. bar. On top of some of these small hinge bearings you will see an oiling hole. Put a drop of oil in
[2] [2] G - 1
(6) Make sure the nee needle dle is cent cent red over over th e cover cover plate hol e. If there is a problem it could be due to a bent needle, or the needle not locating properly in the needle clamp. Always fit a new n eedl eedle e.
7 (7) (7) To adjus adjustt the nee needle, dle, first raise th e nee needle bar t o it s highes highest point by tur ni ng the balance wheel wheel t owards you.
2.3.2006
2 Now relea r elease se th e clamp screw screw very sli ghtly and check that t he needle needle is squarely secure and pushed fully up in the clamp before retightening. If the needle still fouls the hole try a new needle and if the problem persists you will have to examine the clamp itself which we explain explain shortl y. At this stage, if everything connected wi th the th e Head Head is clean clean and working properly - and you have successfully ticked all five items on your check list you are ready to move on to the next section dealing with the Lower Bobbin Area. If you have any prob lems read read on:
2
THE TH E H EAD EAD
Presser Presser Bar Spring
Also, with too little pressure, the the th e press presser foot may not h old t he fabric properly and and it wil l pucker. pucker.
To insert, remove or adjust material from under the presser foot the th e bar bar has h as to b e raise raised d usin g the presser bar lifter lever.
Presser Presser Bar Bracket Screw Thread Cutter
When the face plate is removed four areas areas of t he sewing sewing m achine are revea revealed led i nside nsid e the Head:
Presser Presser Foot att aches here
Thumb nu t
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2. NEE NEEDLE HEIGHT HEIGHT & TI MI NG ADJ ADJUSTMENT USTMENT.. 3. PRES PRESS SER BAR ACTION. ACTION.
Too mu ch pr essur e will impose a drag when operating the machine and induce wear on the teeth of the feed dog.
Presser Presser Bar Spring Bracket
remaining
1. TENSI TENSI ON RELE RELEAS ASE. E.
Presser Presser Bar Regulating Thumb Screw
presserr Too li tt l e pres pressur e on th e presse foot (especially when sewing thick or compact material) can result result in short er sti sti tches than set set as the feed dog fails to grip the fabric firmly.
9 Presser Bar
Presser Bar Lifter
10
4. NEE NEEDLE BAR BAR AC ACTION. Presser Foot
1. TENSI TENSI ON RELE RELEAS ASE: E:
Throat Plate
(fabric)
We have already discussed the Upper Thread Tension Release in the th e previous sec secti ti on. Feed Feed Do g
2. NEE NEEDLE HEIGHT HEIGHT & TI MI NG ADJUSTMENT: ADJUSTMENT: The needle height can be adjusted although seldom required. Most machines also include timing marks to adjust the overall overall ti mi ng of th e machin machin e. However, as these features will seldom be needed, they are left unt il the Fa Fault Finding section. section.
If there is little noticeable difference in pressure, it may be that th at t he spri spri ng needs needs replacin replacin g.
(9) The presser foot, attached to th e end end of th e presser presser bar, presses presses down on the fabric holding it in contact with the feed dog. This enables the feed dog to grip and pull the material forward for the next next sti tch. The pressure applied by the presser foot is adjusted by the presser regulating thumb screw at the top of the presser bar.
3. PRESS PRESSER BAR ACTION. ACTI ON. (8) The presse presserr bar b ar is i s an an adjustabl adj ustable e sprin pr in g loaded comp comp onent centr al to the fabric control function of the machine.
(10) Fee Feell t he dif ference in th e press pressur e on th e li ft er ar m with the thum b nut screwe crewed d fully in and then then full y out.
This knurl ed control is tur ned clockwi se to i ncreas ncrease the amoun t of compression on the presser bar spring and anticlockwise to reduce it .
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11 (11) With the 15K, 66 and 201 m odels the th e spri ng can be see seen n on th e out side of th e Pres Presse serr Bar.
2.3.2006
2
2
THE TH E H EAD EAD Setti ng th e Press Presser Bar Li ft er: It i s important that th ere should should be a small small amount of ‘free play’ i n the action of t he press presser bar Lif ter when the presser foot is down. This ‘free play’ makes it certain that the downward spring pressure is on the material beneath the pr ess esser foot in stea tead d of on t he top of t he press presser bar li fter. If the bar and foot start to lift straight away when the lever is raised raised you need need t o work t hrou gh the following adjustment procedure: - first making sure the teeth of the Feed Dog are below the sur face of t he Nee Needl e Plat e : 12
Before tightening the presser bar bracket screw, screw, make sure sure t hat t he presser foot is not fouling the needle hole. If necessary, rotate the foot un ti l it is clear. clear.
16 (16) The metal clip attached to the end of the presser bar above th e foot is i s a sim sim ple pl e Threa Thr ead d Cutt er. It is occasionally necessary to remove the presser foot to thoroughly clean the end of the presser presser bar and t he foot i tself.
(12) To replace th e spr spr in g, un do the thum b nut completely and slide slide out the old sprin g. 14 (14) Loosen t he Presse Presserr Bar Bracket Br acket Scr Scr ew.
17 (17) Rai Rai se t he Press Presser Bar an d th e Nee Needle dle Bar, loosen loosen th e knu rl ed th um b scre screw w and rem ove t he Presser Presser Foot
15
13 (13) (13) Wit Wit h t he 99 mod el, the top of the spring is attached to a rod and t hen encased encased in side id e a tu be. It is removed in the same way by undoing the thumb nut completely pl etely.. If you do n ot h ave a spare spare spring please highlight the compr ess ession probl em on your check check li st and w e will remedy it at Netley.
(15)Wit h th e press presser bar releas release lever lever d own, li ft t he press presser foot slightly by hand and in ser t t he blade of a sm sm all screwdr crewdr iver b etween tween th e presser foot release lever and t he pr ess esser bar br acket. acket. Let the presser foot down again, check the presser foot is clear of the needle hole and tighten the pres pr esse serr b ar bracket b racket screw. Check that there is the required small movement of the presser bar release lever before contactin g the presser presser bar br acket. acket.
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18 (18) The standard foot has been designed for easy detachment from the end of the presser bar because it is interchangeable wit h ot her styles styles like th e Hemm Hemm er Foot shown above. above. There is also a range of accessories designed for specific tasks. These are attached to the end of the presser bar in place of the standard foot and are discussed in detail in a later later section section .
2.3.2006
2
2
THE TH E H EAD EAD
4. NEE NEEDLE BAR BAR AC ACTION: Thread take up l ever ever
21 19 (19) On occasion you may encounter a machine with a broken br oken or badl y bent Thr ead ead Take Take Up lever which needs replacing. Becaus Because e th is is in frequent - and a tricky operation on certain models - we describe the action required in the fault finding section. Needle Needle Clam Clam pi ng: The last last area we need to l ook at i s the needle clamp. This can usually b e succes success sful ly cl eaned eaned i n sit u using a tooth br ush. If you do have cause to dismantle it, you should be aware of the slight vari vari ation between between m odels. odels.
End of Needl Needl e Bar showing locating groove for top of needle
20
22
(22) The latest and most complicated system has a small thread guide component located located in side the needle needle clam clam p - and t he clamp itself is secured to the bar with wi th a sm sm all grub screw. crew. When re-assembling it is easiest to seat the thread guide in the clamp then slide both upwards onto the needle bar - then insert and t ighten t he grub screw. screw. The thum b screw screw is then required to secur secure e the nee n eedl dl e. It pres pr esse ses s on the anvil end of the thread guide whi ch in tur n p ress resses on t he side side of th e top end of t he needle. needle.
(20) The illustration above shows the simplest form of needle clamp as fitted to early 99 and 66 models.
It is worth a reminder here that the flat side of the needle on the 201 machines should face to the left (away from t he machine). On all the other models the flat side faces right (inwards towards the machine).
(21) A later modification in cluded a th read read guid e att att ached ached to t he back of the Needle Needle Bar Bar w it h a sm sm all screw. screw.
If you get get th is wrong the machin e simply won’t sew, for reasons explained in the first section on ‘How a sewin sewing g machine machi ne wor ks’ ks’..
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2.3.2006
LOWER LOWER BOBBI N AREA AREA (66 & 99)
2 INTRODUCTION
This section covers the mechanisms revealed when the cover plates pl ates are rem rem oved. oved. This Thi s in clud es removing, cleani cleani ng and resettin resettin g the feed feed d og, hook rin g and and lower bobbin.
2
(3) Remove th e rectangul rectangul ar cove coverr by li ft in g th e in side edge up a lit tle, pushin pushin g it over over t he feed feed dog and slidi ng it off. Before Before you stow it away, away, clean clean out the grooves underneath with a discarded needle or a knife blade and give a single drop of oil to each. 6 Make sure you remove all fluff from between the teeth of the feed dog as well as giving it a general general cl ean. ean. Put t o on e sid sid e for the moment as it is easier to clean the hook ring area with it out.
1
H OOK RING RI NG AREA AREA (1) You w ill fin d i t eas easier ier and possibly less painful if you remove the presser foot and the needle before starting work in th is area. COVER PLATES
4 (4) The cover cover i s held i n place p lace wi th a plate spring. Brush out any debris from this area and check that t he spri spri ng is in tact. The screw holding this spring in place pl ace has a very very n arrow d iameter. iam eter. If you decide to remove it for cleaning, be very careful how m uch force f orce you use. use. FEED FEED D OG
The components are shown in these illustrations. The earl y type had a fixed bobbin holder position bracket. bracket. The later type was changed to allow the removal removal of the bobbi n holder without removing the position bracket as well. In both cases remove the bobbin holder and th e posit posit ion bracket bracket t o clean clean the hook rin g. Early t ype
This is held in by a screw under the machine shown here. 2 (2) The semi-circular feed plates, while different in size, all attach in th e same same way wit h two t wo screws. screws. These are easier to remove by using a long screw-driver, (a) particularly one with the blade cut at an angle of 150 or (b) with a cranked (or angled) screwdriver. Clean and set set aside. asid e.
7
5 (5) (5) Turn the machine machine up on end, end, resti resti ng on th e face plate, if the scre screw w is difficult to tu rn .
3
(6) The feed dog can then be lifted out upwards from the machin e for cleaning. cleaning. (Th is one needed it!)
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(7) (7) Undo the sc screw holding the posit posit ion br acket acket in pl ace ace. Take it out and the bobbin hol der shoul shoul d also come out easily. Later Later t ype The position bracket now consists of tw o parts, the main body and a latch plate, joined by a screw.
2.3.2006
2
2
LOWER LOWER BOBBI N AREA AREA (66 & 99)
Bobbin Holder Posit Posit ion Bracket Bracket
Felt
Thread Guid ance Spr Spr in g Bobbin Lifting Ar m
Latch Plate Latch Plate Screw
11
8
(8) By By hooki ng a fingernail u nder the latch plate, it can be lifted and moved side-ways, making enough space for the bobbin hold er to be re-moved. re-moved. 9
(11) Now locate the underside of the pi n. Its posit posit ion is shown shown h ere and can usually be seen as a small shiny circle. Push on this with a nail punch and it will lift up and can be removed removed from the top. Hold the position bracket aside for cleaning.
13
Bobbin Holder Locating Spur
(13) Apart from keeping the bobbin holder in position, this uni t has: has: a felt wick to keep keep the hook ri ng free of fluf f a lever, lever, whi ch when w hen depres d epress sed, lifts the bobbin out of the holder holder for eas easy remova rem oval. l. at one side there is a flat spring that provides a smooth path for the upper thread as it goes goe s roun d th e bobbin holder.
(9) (9) To remov remove e the main main body fi rst un do th e screw and and remove the latch pl ate. The screw holding the position bracket in the early type is replaced by a pin (see arrow above).
12
(12) Now Now clean clean th e hook r in g. If t he machine is of any any age age it wi ll have collected collected a lot of flu ff, whi ch mi xed xed wit h oil can can take a whi le to remove. Scrape round the inside of the hook ring as well as the outside, and clean the cuts in its surface. Do not t ry t o remove remove the th e hook ri ng for cleaning - it destroys the machin e’s tim in g.
10
Clean out any debris from the hook ring area and check the condition of the actual hook (arrowed). It shoul d have a clean sharp poi nt , free free of flu ff.
(10) The pin is held in by a grub screw under the base plate. Loosen this screw.
14 (14) If t he felt felt has bee been n wor n, remove remove it in it s spr ing holder. The felt felt can be diffi cult t o remove from its holder. Some-times it yields to snipe-nosed pliers, or driving an old needle through from the side and and ‘un screwin crewin g’ i t. As a last resort, a small drill can be used used to bore most of it ou t and then pick the rest out with a needle. Clean the rest of the bracket. A sti ff toot hbr ush is ideal for thi s.
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2.3.2006
2
2
LOWER LOWER BOBBI N AREA AREA (66 & 99)
If needed, a new felt can be cut. At present, Netley Marsh has a small stock of this felt, 5 mm thi ck, whi ch can can be supp supp lied in a str ip 17 mm w ide. From this a trapezium trapezium nee needs ds to be cut, cut, wi th a wid e end 9 mm and the other end end 3 mm.
You can test this by hanging a 1 oz weight or equivalent (3 one pound coins) from the thread and turning the bobbin holder nearly vert vert ical. The th read read should just about leave the bobbin. Adjust the tension as requi red. If you can’t can’t get get enough tension tension , it is probably one of two reasons:
15 18
(15) If these are cut from alternate directions there is virt ually no waste. waste. Make a cut 5 mm deep in the wide end to fit over over th e ri m of t he hook ring.
(18) (18) After clea cleanin nin g, retur n the bobbin to the holder. Hold the bobbin wit h th e thr ead leaving leaving it i n an anticlockwise dir ection .
The spring has been damaged. Fit a different one if you have a spare, spare, or n ote for attent ion on t he checklist. checklist. Fluff has collected under the spr in g. Remove Remove the spri ng, clean and refit. REASSEM REASSEMBLY BLY
16
(16)Screw (16)Screw the narr ow end end of th e felt i nt o the spr spr in g as far as it wil l go go Then screw the spring into the side of th e bracke bracket, t, fin ishing wit h the slot horizontal. It is now ready ready for refitt in g. BOBBI BOBBI N H OLDER OLDER
19 (19) (19) Draw the thread thread int o the top of th e slot in the side side of the bobbin holder...
Remove the bobb in and clean clean the hol der. You will wi ll see see there are tw o small screws in the side of the holder: the fixing screw and the tension adjustment screw.
21 (21) (21) Place th e bobbin positi on bracke brackett in t he hook ring in it s appr appr oxim oxim ate posit posit ion.
17
Thread Exit Exit Notch
Thread Entrance
20
Tension Adjustment Screw
Fixing Screw
(17) There is a sm sm all spri ng in th e side of the holder which controls the lower bobbin thread tension. The fixing screw fastens the spring to the body of the bobbin holder, and the other varies the tension tension on th e spri ng.
(20)...then backwards so so t he thr ead is drawn in to th e exit slot . The thread then feeds from the not ch in t he bobbin cas case towards towards th e needl needle e. Check that there is some resistance resistance when you pul l t he end of the thread. To be precise, this should be equivalent to 1 oz (28 grams).
[ 2] 2] H - 3
22 (22)Now replace th e bobbin hold er, er, so that t he groove groove in i t s side sadd saddles les th e edge edge of the hook ri ng a and nd t he notch in it s end i s located located in th e spur on t he posit posit ion bracket. bracket. Now wr iggle iggle the positi on b racket racket in to pl ace ace, with the felt half above and half below the hook ring top edge.
2.3.2006
2
LOWER LOWER BOBBI N AREA AREA (66 & 99)
If you have the early model with the screw, make sure the tail of the position bracket is in its not ch, th en fasten fasten t he screw screw..
25
23
(25) Leve Leverr t he posit posit ion br acket acket acr acr oss to m ake thi s sm all gap...
(23) (23) If you have have the pin t ype, ype, inse insert t he pin unt il th e shoul ders of t he pin are compl compl etely in the posit posit ion bracke bracket, t, then tighten tighten the gru b scre screw w holdi ng it in place.
26 (26) ...then ...then pr ess down fi r m ly on t he plate with a finger finger whi le ti ghtenin g th e screw. crew.
24
Give the balance wheel a couple of turns to make sure everything is in th e right pl ace ace.
(24) (24) Fin ally, ally, put t he latch plate back back on the posit posit ion br acket, acket, and replace it s screw crew - but n ot ti ght at t his stage. The screw screw hole in i n the th e plate is larger larger than the screw, so that although the plate is held firmly in the notch, the bracket underneath can be moved from sid e to sid sid e. It is essential that, when the screw crew i s finally t ightened, there is a small gap between the back of the bobbin holder and the position bracket to allow the top thread to slip through unhindered when the stitch is made. See pi cture ctu re (9) on page H - 2. If a large large gap gap is left, th e machine wil l wor k, but can can b e noisy. noisy.
[ 2] 2] H - 4
2
2.3.2006
LOWER LOWER BOBBI N AREA AREA (201 & 15K)
2
When the t he needle holder hol der descends, descends, it will stop t he machin machin e action. action. If the screw is really stubborn, do not persist. You are in danger of spoiling the timing of the machine.
201 1
3 (3) Remove the bobbin holder latch for cleani cleani ng.
(1) Rem ove square cove coverr i n t he sam sam e way as th e 15K (see (see pi ctur e and paragraph 11 on page H-6). Remove, emove, pr ess esser foot, nee needle dle and and bobbin .
2
In stead, lever back th e tw o clips, (C) (C) & (D) and remove the bobb in holder and it’s retaining ring, leaving leaving th e hook rin g in pl ace ace.
The illustration is of the underside of the part . The spri spri ng th read read guides tend to coll ect ect fl uff. Clean Clean round and und er the hook uni t wi th a brush or cleani cleani ng rag. rag. Frequentl Frequentl y, you you wil l fi nd t hat you can avoid removing the unit for cleaning. Most of the debris collects in side the bobbi n h older and can be removed with a cleanin g rag.
6 (6)Otherwi se, take out th e uni t for cleanin g.Unscrew g.Unscrew the two clips clip s (pre (pr eferably over over a cont container ainer t o pr event event l osin osin g the screws screws). ).
2 (2) The 201 lower bobbin area is shown here. The hook ring and bobbin holder has been condensed into one neat package. The only other component is (B) the bobbi n holder latch. The operati on i s as follows: fol lows: The hook (A) turns clockwise and picks up the thread from the needle. needle. It cont in ues to rotate, carr carr ying t he thr ead ead with it over over the top of th e lower lower bobbi n.
4 (4) If ve verr y dir dir ty howeve however, r, remove remove this unit from the machine machine by un doin g the l arge screw whi ch can can be see seen n i n t he centre.
Bobbin Holder Hold onto the balance wheel while you undo this, as the hook ring will be turned by the screwdriver.
As the take up arm ascends, the th read read is pull ed down th rou gh the gap gap (E) between between the bobbin h older older arm and the bobbin holder latch. latch.
Hook Rin Rin g
The thread slip slip s off the hook and the sti sti tch i s made whil e the hook r in g makes makes anoth anoth er compl ete revolut revolut ion, i .e. .e. two revolut revolut ion s per sti sti tch. The picture also highlights the two clips, (C) (C) and and (D) that hold the hook rin g and and bobbi n holder together as a unit.
Retainer Rin g
7
(7) The unit wil l th en come apart apart in to the t hree pieces pieces shown. 5 (5)I f t his proves proves diffi cult, place place a block of wood on t he base base plate un derneath t he needle needle holder.
[ 2] 2] H - 5
The bobbin holder is a sliding fit within the hook ring. There is a circular groove in the top of the bobbin holder, and the retainer retainer ring ri ng has a circular ‘tongue’ which corresponds with t his to hold it i t in i n plac pl ace e.
19.2.2006
2
LOWER LOWER BOBBI N AREA AREA (201 & 15K)
Clean all the components and reassemble. Put a single spot of oil in the groove on the bobbin holder before replacing the retainer rin g.
The hole in the centre of the screw holding the bobbin holder in place is an oiling hole. Give it one or tw o drop s of oil before you return return the bobbin.
The pointed end of the retainer ring has to be slid r ound slightl y under the hook to line up the clip positions.
Test est t hat t here is som som e tension tension on the thread as covered for the 66/ 99 on pag p age e [2] H - 3. Finally replace the feed dog after cleaning. 15K
2
(12) Remove th e rear rear cover cover pl ate, pr ess esser foot and n eedl eedl e. The lower bobbin, hook ring etc is enclo enclos sed in a removeabl removeable e un it th e shu shutt tt le race. race. Although unfamiliar in appearance, this unit works in exactly the same way as the others. (The hook rin g is turn ed by the dr ivin g yoke and oscill oscill ate ates s forwards and backwards)
This is the earliest of the round bobbi n machin es we send. send.
The location positions for the clips can clearly be seen on the hook ring and the retain retain er rin g. 8 (8) Replacing the retainer ring. 10 The clip clip opposite the hook is th e eas easies iestt to align.
clip.
The thr ead ead loop from th e needle... needle...
...is ...is picked p icked up by the hook...
(10) It uses a larger bobbin, not interchangeable with that for the other machin es. es.
9 11
(9) (9) Hook Hook th e end of the clip clip on to th e top, press press it i n to t he side of the hook r in g so that th e hol es for th e screw lin e up u ndern eath and fasten. fasten. Repea peatt for th e oth er cli p.
(11) Remove th e cove coverr pl ate by li ft in g the outside edge edge ver ver y sli ghtl y and twi sti ng the plate with a lit tle presure presure towards you and upw ards. ards.
If you did not remove the unit to clean it, lever the clips out from the side of the hook ring slightly wit h small screwdr crewdr ivers or slivers of wood. Reassemble the parts, lining up for the clips as above. Then remove the wedges and press th e cli cli ps int o place pl ace..
12 ...and ...a nd brought br ought clockwi se over over the face of th e bobbin holder. As th e hook reaches reaches th e end end of i ts downward t ravel, ravel, th e thread thread slips off the hook. The take up arm is rising and pulls the thread up over the bobbin face, past the bobbin holder arm arm and the stit stit ch is made.
Replace eplace the bobbi n h older l atch, with the bobbin arm secured as shown i n pi cture 2.
[ 2] 2] H - 6
19.2.2006
2
2
LOWER LOWER BOBBI N AREA AREA (201 & 15K)
It is eas easier ier to w ork on t he shut shut tle race if you rest rest t he machine on i ts balance wheel end end.. 13
15 (15)Tur n t he shu shu tt le race over over t o take it apa apart rt and undo the lar ge screw wh i ch r eleases eleases th e spr in g plate.
(13)Remove (13)Remove th e bobbin h older by lift in g the latch on it s face.
The unit can now be broken down into its three parts; the fron t and rear rear part s of th e shut tl e race and the hook. Clean all three.
As th e latch i s raised, raised, a ba barr u ndernd erneath it slides across and grips the edge of the bobbin cheek, holding it inside the bobbin holder.
18
(18) Note that the hook has a spindle to locate the bobbin holder. At the top of thi s spin dle th ere is a circu lar groove. Check that when the bobbin holder latch is closed, the bar underneath it slides across into this groove, preventing the bobbin h older older from falling out. The tension tension spri spri ng on the bobbi n holder has only one screw. The tail of t he spri spri ng is held in a slot, slot, so the screw can combine the functions of holding the bobbin in and vary the tension. It is eas easier to t o check the tension b efore return return ing the bobbin holder to the machin e.
Check that it does so, because otherwise with the vertical operation, ope ration, it is difficult t o return return the bobbin holder with its bobbi n after changin changin g the thread. thread.
Re-assembly 16 (16) (16) The two halves halves of th e shut shut tl e race are are located t oge ogeth th er by pi ns. When in place they provide a square-edged channel for the hook to slide in, while holding it in place.
14 (14)Raise (14)Raise the needle needle bar t o it s highest highest posit posit ion, undo th e two screws screws on t he fron t of the shut shut tle race and the uni t will lift off. off.
19
If it is stuck with old oil, lever gently with a screwdriver to release it. Now is the bes best ti me to clean clean the feed dog and the area surroun din g the shut shut tle race. race.
17 (17) The hook is turned by the driving yoke at the end of the main dr iving rod.
[ 2] 2] H - 7
(19) After cleaning thoroughly, marry the two halves of the shuttle race together. Put the spring plate on, with the two arms just just in side the two pi n ends and tighten the retaining screw completely.
19.2.2006
2
LOWER LOWER BOBBI N AREA AREA (201 & 15K)
20
(20)Ne (20)Next, xt, put t he hook hook i nto th e channel in t he shut shut tl e race. race. Put the hook vertically into the race from the th e rear rear.. First locate the point of the hook in the channel just ju st to th e left of centre centr e at th e bottom with the hook leaning backward. backward. Now bri ng th e hook up vertical. Push ush t he hook to th e right and it will fit i nto the channel. channel. Hold it there whil e you fit the whole unit back back in to t he machine. machine. 21
(21) (21) Tighten Tighten t he two holdin g bolts. Refit the bobbin holder, holder, wit h th e arm l ocate ocated d in t he notch at the top of the shut tl e race. race. Turn the balance wheel a few turns to make sure everything has gone back back in to i ts ri ght pl ace ace.
[ 2] 2] H - 8
2
25.3.2006
UND ERSI DE 66/ 99
2 INTRODUCTION
66/99
Apart from the usual cleaning and oiling, there are four tasks to be done don e under t he base: base:
1
Checki hecki ng t he Roll Roll er s Most important: Every time the fee feed dog is rai sed, th e rol l er sl i des des i n a channel. channel. If the th e roll er does does not rotate, rotate, it wears wears it self and the channel.
The underside of the machine collects a lot of dirt, fluff and surplus oil during its lifetime. “Out of sight, out of mind” perhaps.
It is important to set the Feed Dog height as accurately as possible.
4 (4) Remove the scre screw w i n pictur e and the lin k can can be lift ed off. Turn the balance wheel until the feed fee d dog contr ol arm can can b e lifted up t hrou gh the gap gap in t he linkage. linkage.
1 (1) (1) Turn the mac machine up so so it is resti resti ng on t he head head end. Undo th e screw hol din g th e fee feed dog lift ing arm in place place.
5 (5) The roll er can then be freed freed as th e other. 2 (2) (2) Pull th e arm out to the left. left.
Checki hecki ng t he Sti Sti tch Length Length
If the roller is stuck, you may have to remove the hook rin g link to u se pliers on th e roller.
Checki hecki ng t he Roll Roll er s
Too little and the Feed Dog disappears back under the cover plate before any long stitch lengths can be obtained, too mu ch and t he press pressure foot t ends to bounce and loses control of the fabric.
3
Wipe off any penetrating oil and apply a drop of oil at each each end of the roller. Check the other roller on t he feed feed dog contr ol arm .
Brush Brush out all fluff and wi pe all all t he connecting rods with cloth or paper t owel t o rem ove greas grease e and dirt. Use a scouring pad on very dirt y parts. parts.
2
Replacin epl acin g th e Fee Feed d Dog Do g and checki checki ng th e height height
2
If the arm is difficult to remove, turn the balance wheel while pulli ng on the arm.
Replace the link if you have had to remove it. (Refer to picture (4) to get it the right way round). Tighten it s screw screw.. Return the feed feed dog li fti ng arm by reversing reversing th e acti actions ons to remove it . Checki Checki ng tthe he Fee Feed d Dog Height
4
Checki Checki ng for exce exces ssive pl ay in th e connecti connecti ng ar ar m s. Each machine is dealt with in turn , apart apart from this last last i tem. This task is so similar for each model that it is dealt with as a common task at the end of the Underside section.
3 (3) (3) Chec heck that the roller roller on t he arm t ur ns easil asil y. If not , apply penetratin penetratin g oil and leave leave.. Then Then grip wit h p liers and loose loosen. Conti nue unti l th e r oll er m oves oves eas easil y.
[ 2] 2] I - 1
6 (6)Re (6)Repl ace ace the fee feed dog, wit h i ts holdi ng scre screw w ju st ti ght .
25.3.2006
2
2
UND ERSI DE 66/ 99 Adjust by loosening the feed dog screw, raising or lowering the feed fee d dog do g and and retesti retesti ng.
7
Note: Always test with the machi machi ne in it s normal h orizontal orizontal position and push down on the feed dog to make sure it is fully down befor before e you t est .
Turn the balance wheel wheel for a full sti tch cycle to m ake sure ur e th at you have not overdone your adjustment which can cause the feed dog to catch on th e bedpl bedpl ate ate..
Tighten t he feed feed dog screw screw fir m ly. (7) Before Before you you r eplace place the half half rou nd cover cover plate clean clean out any debri s fr om th e edge edge of the depres depression int o whi ch it fi ts wit h a sm sm all screwdri screwdri ver. ver. An accumulation of debris can m ove th e plate pl ate over over sli sli ghtly ghtl y when it is replaced. Replace the cover plate and check that t he feed feed dog comes up through it without touching either side. If this is a problem see the ‘Advanced Techni ques ques’ section l ater ater i n th i s man ual or not e for Netl Netl ey Marsh. The points on the teeth of the Feed Dog (at the maximum proj ecti ecti on above above the cover cover plate) should be set at an optimum height of aroun d 3/ 64ths 64ths of an inch. This equates to 50 thousands of an inch . You could use feeler gauges to m ake up close close to thi t his s. Alternative Alternati vely, ly, set th e height height to a wh isper isper u nder th e thicknes thi ckness s of a 5p 5p coin. coi n. Set the sti sti tch l eng ength th to m axim axim um and turn the balance wheel until you judge that the feed dog has reached reached its maxim maxim um height.
Checki hecki ng t he Sti Sti tch Length Length Now is a good good t im e to check thi s. With t he sti sti tch length cont rol set set to maximum, turn the balance wheel and check that the feed dog tr averse averses s the slot slot in th e cover cover almost all of it s length. plate for almost all
10 (10 (10) If all is well, well, re-tighte re-tighten n t he nut while holding the bolt sti ll with the scre screwdri wdri ver. ver.
If i t i s set short short er than th is, do th e following:
9 (9) Lay Lay the machin machin e on it s side, hi nge side down, and locate the link fr om the top of the machine to t he long connec connecti ti ng r od. Loosen Loosen the nu t on thi s linkage linkage. A 3/ 8” AF rin g spann spann er is best. best. Y You ou may nee need to hold t he bolt firm ly with a screwdriver to stop it turn ing while you do thi s. There is no need to remove the nut completely - just loosen it enough to allow the bolt to be turned. The bolt is an eccentr eccentr ic. You wil w il l see th at it ch ange anges s th e position posit ion of the feed feed d og as as it i s turn ed.
8 (8) Lay Lay any guide guide you have have alon gsid gsid e th e fee feed d dog. The ti p of the teeth teeth should be just just leve level wi th the top of t he guide.
Turn the balance wheel until the feed fee d dog is at th e end end of iits ts travel. Turn the stitch control bolt with the scre screwdri wdri ver ver u nt il the feed feed dog approaches approaches the end end of t he slot slot in th e cover cover plat e. Cont in ued Overl Overl eaf eaf
[ 2] 2] I - 2
25.3.2006
2
U NDERS NDERSI DE 66/99
OILING
Specifically these ar e: e:
This picture shows the underneath nea th oi li ng point s.
The beari beari ngs at th e end end of t he top con necting rod, and t he feed feed dog arm arm .
With th e machine machine restin restin g in th is position , put a drop of oil in each each place marked with an arrow. Some of these points are pivots, others are oiling holes. Make sure all the oiling holes are clear of d ebris. ebris.
The joints at each end of the bottom arm. In the inset inset p icture, the oilin g holes in the li nkage nkage arm arm , the post holding the hook ring arm, and the bottom cam into which the roll er fit s.
[ 2] 2] I - 3
2
(This oiling hole can only be seen when the mechanism is in the i nse nset pos p osii ti on ). ). Run the machine for a few revolutions to work the oil into the bearings before turning the machine upright.
25.3.2006
U NDERS NDERSI DE 15K
2
2 An accumulation can move the plate over slightly when it is replaced. Replace Replace the cover p late and check that the feed dog comes up through it without touchi ng eit eit her side. side.
Roller Fitting
If th is is a pr obl em see see ‘Advanced Advanced Techniques’ later in this manual or n ote for Netley Marsh.
Stitch Length Adjustment
Lay the machine on its back i.e. with the hinge points on the table. Brush Brush out all fl uff and wi pe all the connecti connecti ng rods wit h cloth or paper towel or - in bad cases a scour scour in g pad. to remove greas grease e and dirt .
You can now test the roller for movement.
The points on the teeth of the Feed Dog (at the maximum projection above the cover plate) should be set at an optimum height of around 3/ 64ths 64ths of an inch. This equates to 50 thousands of an an i nch. nch . You could use feeler gauges to make up close close to t his hi s. Alternati vely vely,, set th e height height to a wh isper isper u nder th e thicknes thi ckness s of a 5p coin.
Checki Checki ng th e Roll er The 15K has only one roller. It is on a fit tin g connec connected ted to th e long connecting connecting rod at the front of the machine. The roller is difficult to see and difficult to detect whether it is turn ing. If in any doubt, you you m ust ust make sure, as otherwise the machine will wear unnecessarily.
screw
3
Set the sti sti tch length t o m axim axim um and turn the balance wheel until you judge that the feed dog has reache reached d it s maximu m h eight. eight.
( 3) I f st st i l l st st u ck ck , r o t at at e t h e f i t t i n g t ow ow ar ar d s y ou ou , o i l b o t h ends of the roller, and g gri ri p it wit h pli ers to loose loosen i t. Replace the fitting by rotating it back, and sliding the fitting back along the shaft until the yoke on the feed feed dog arm arm is in th e midd le of th e roller. roller. This operation will have upset the height of the feed dog, so do not re-tighten the screw at this stage. Checki Checki ng the t he Fee Feed d Dog Height
1
Replace the feed dog - if you removed removed it for cleaning.
(1) Loose Loosen t he scre screw w on t he roller arm arm .
5 (5) Lay Lay your gauge gauge alongs alongside th e teeth tee th of t he feed feed dog and check check th e height height . If you need to adjust the height, loosen the feed dog screw. (You m ay have already already don e so so checkin g the roller.) rol ler.) See See pi cture ctu re (1). Rotate the fitting until the feed dog is at the right height. Reti ghten t he screw screw..
4 2 (2) Use Use a nail nail p unch and a hamm er t o ge gentl y tap the fitt ing to the ri ght.
(4) Before Before you you r eplace place the half half rou nd cover cover p late clean clean out any debr debr is from th e edge edge of the depres depress sion in to wh ich it fi ts with a sm sm all screwdri screwdri ver. ver.
[ 2] 2] I - 4
Checki hecki ng t he Sti Sti tch Length Length Now is a good time to check this. With t he sti sti tch length cont rol set set to maximum, turn the balance wheel and check that the feed dog tr averse averses s the slot slot in th e cover cover plate for almost all of it s length.
25.3.2006
2
2
U NDERS NDERSI DE 15K
If it is se set short short er t han t hi s, do the following : Lay the machine on its side, hinge side down, and locate the link from the top of the machine to t he long connectin connectin g rod. At At t he bottom of the machine. machine.
The bolt is an eccentr eccentr ic. You wil w il l see th at it ch ange anges s th e position posit ion of the feed dog as it is turned. Turn the balance wheel until the feed dog is at at t he end end of i ts travel. travel. Turn the stitch control bolt with the scre screwdri wdri ver ver u nt il the feed feed dog approaches approaches the end end of t he slot slot in th e cover cover plat e. Turn the balance wheel wheel for a full sti tch cycle to m ake sure th at you have not overdone your adjustment which can cause the feed dog to catch on the bedplate.
6 (6) Loo Loos sen t he nut on th is linkage linkage A 3/ 3/ 8” AF rin g spann spann er is best. best. You may need to hold the bolt firmly with a screwdriver to stop it t urni ng while you you do thi s. There is no need to remove the nut completely - just enough to allow allow the bolt t o be turned.
If all is well, re-tighten the nut while holding the bolt still with th e screwdri screwdri ver. ver. Turn the balance wheel over a few times to make sure the machine is moving freely.
[ 2] 2] I - 5
OILING This picture below shows the underneath oiling points. With th e machine machine restin restin g in th is positi positi on, put a drop of oil in each ach place marked marked wi th an arrow. Some of these points are pivots, oth ers are oili ng hol es. es. Make sur sure e all the oiling holes are clear of debris.
25.3.2006
UNDER UN DERS SI DE 201
2
2 The roller rol ler i s eas easier t o see see - and t o detect whether it is turning - in this setting. If in any doubt, you m ust m ake sure, as as oth erwi se the machine will wear unnecessarily.
1 5
(1) Lay Lay the machin machin e on it s back back i.e. i.e. wit h th e hin ge point s on th e table. The covers have been removed from the gea gears rs in t his illu strati on. The shallow cover under the hook ring area collects dust and fluff. Remove it to clean. Normally the other gear cover need not be removed. Brush out all fluff elsewhere and wipe all the connecting rods wit h cloth or paper towel or - in bad cases - a scouring pad to remove grease and dirt .
Refix the screw and the feed dog arm wil l be held held down. Because this feature is seldom used, used, the knob can can be diff icult to turn. If you fail with a screwdriver, use pliers and add a couple of drops of oil as soon as you have a crack between the knob and its fitting. Only unscrew the knob sufficiently to release the bracket holding the roller.
It is now easier to test the roller and to grip it with snipe nosed pli ers to fr ee it . If sti ll stuck, th e roller bracket bracket can be removed. Rotate the fitting towards you so that the screw holding the bracket in place can be undone. (It is normally obstr obstr ucted by t he feed feed d og arm arm ). With a li tt le wri gglin gglin g, the bracket bracket can be removed. Replace the bracket when the roller has been freed freed and oiled.
Checki Checki ng th e Roll er The 201 has only one roller. It is on a fit tin g connec connected ted to th e long connecting connecting rod at the front of the m achin e. (See (See pi cture ctu re (1)) 2
(5) Loose Loosen t he scre screw w on t he roller arm and push push it to the r ight . If nece necessary, use a nail punch and a hamm er t o gent gent ly tap th e fi tt in g over. over.
3 (3) This picture shows the setting for n orm al sewing.. sewing....
Replace the fitting by rotating it back, and sliding the fitting back along the shaft until the yoke on the feed feed dog arm arm is in th e midd le of th e roller. roller. This operation will have upset the height of the feed dog, so do not re-tighten the screw at this stage. Checki Checki ng t he Feed Feed Dog height Replace the feed dog - if you removed removed i t for cleani cleani ng.
(2) This fitting allows the user to keep the feed dog below the cover plate when doing ‘free form’ work - embroidery or darni ng for in stance. tance. By unscrewing the knob, the roller part of the fitt in g wil l swivel. swivel.
4 (4) In this one the machine is set for free form work.
[ 2] 2] I - 6
6
25.3.2006
2
2
UNDER UN DERS SI DE 201
(6) Before Before you you r eplace place the half half roun d cove coverr plate it i s wort h cleaning cleaning out any debri debri s from th e edge edge of t he depress depression in to which it fi ts wit h a small screwdriver. An accumulation can move the plate over slightly when it is replaced. Replace the cover plate and check that t he feed feed dog do g com com es up through it without touching eith er sid side. e. If t hi s is a pr oblem obl em see see “Advanced Techniques” later in this manual or note for Netley Marsh.
Checki hecki ng t he Sti Sti tch Length Length Now is a good ti m e to check thi s.
Turn the balance wheel over a few times to make sure the machine is moving freely.
With t he sti sti tch length cont rol set set to maximum, turn the balance wheel and check that the feed dog tr averse averses s the slot slot in th e cover cover plate for almost all of it s length. If i t i s set short short er than th is, do th e following: Lay the machine on its side, hinge side down, and locate the link from the top of the machine to the long connecting rod at the bottom of the machine. machine.
The points on the teeth of the Feed Dog (at the maximum proj ecti ecti on above above the cover cover plate) should be set at an optimum height of aroun d 3/ 64ths 64ths of an inch. This equates to 50 thousands of an inch . You could use feeler gauges to m ake up close close to thi t his s. Alternative Alternati vely, ly, set th e height height to a wh isper isper u nder th e thicknes thi ckness s of a 5p 5p coin. coi n. Set the sti sti tch l eng ength th to m axim axim um and turn the balance wheel until you judge that the feed dog has reached reached its maxim maxim um height.
8 (8) (8) Loos Loosen th e nut on thi s link age. A 3/8” 3/8” AF ring spann er is best best . You m ay need nee d to hold the bolt fir ml y wit h a scre screwdri wdri ver ver to stop it tur nin g whil e you do thi s. There is no need to remove the nut - ju st loosen loosen enough to allow the bolt to be turned.
7 (7) Lay your gauge alongside alongside the teeth tee th of t he feed feed dog and check check th e height height . If you need to adjust the height, loosen the feed dog screw. (You may have already done so checkin g the roll er - see see picture (5)). Rotate the fitting until the feed dog is at the ri ght height.
The bolt is an eccentr eccentr ic. You wil w il l see th at it ch ange anges s th e position posit ion of the feed feed d og as as it i s turn ed. Turn the balance wheel until the feed fee d dog is at th e end end of iits ts travel. Now turn the stitch control bolt with the screwdriver until the feed dog approaches the end of the slot in the cover cover p late. Turn the balance wheel wheel for a full sti tch cycle to m ake sure th at you have not overdone your adjustment which can cause the feed dog to catch on the bedplate.
Re-ti ghten th e screw screw.. If all is well, re-tighten the nut while holding the bolt still with th e screwdri screwdri ver. ver.
[ 2] 2] I - 7
Cont in ued Overl Overl eaf eaf
25.3.2006
2
OILING
UNDER UN DERS SI DE 201
2
With th e machine machine restin restin g in th is positi positi on, put a drop of oil in each place marked with an arrow, except except A. Some of these points are pivots, others are oiling holes.’ Make sure all the oiling holes are clear of d ebris. ebris. Turn the balance wheel a few ti mes to circulate the oil.
The main picture shows the underneath underneath oilin g points.
To oil poi nt A, brin g the machine back upright and put a couple of drops of oil in the hole which is visible about halfway up the hook ring casing. This oils the gear gear wheels w heels below.
[ 2] 2] I - 8
9
(9) To oil the gear wheels at the otherr end of th e machine othe machine,, put a couple of drops of oil into the hole on on t he main main pi llar, llar, shown in the adjace adjacent pictur e.
25.3.2006
U NDERSI NDERSI DE PI PI VOTS (All (Al l Machi Mach i n es) es)
2
2
SCREW TYPE T YPE
5 (5) Use Use a 9/16th 9/16th AF r in g spanner spanner to undo the locking locking nut. The screw can can n ow be tur ned in wards with a scre screwdr wdr iver. CONNECTI CONNECTI NG RODS RODS & PI VOTS VOTS
3
1
5
(1) Pivot Pivot s are used used for fo r connecti con necti ng rod bearings on all machines, sim il ar to t hat shown abve. abve. It consists of a screw conical pointed end, locates into an opposite fitting on the end connecting bar.
Test est t he amount of m ovement ovement as for th e plain t ype. ype.
with a which shaped of the
(3) (3) Chec heck that, when when holding the connec connecti ti ng rod, it has the minim um move movement from l eft to r ight. If th ere is disce discern ibl e movement, movement, it needs adju st in g.
(6) (6) Hold the screw crew firm ly in place place while you tighten t he locknut wit h a spanner spanner.. ADJUSTABLE CONNECTIONS
PLAIN TYPE TYPE
6 4 2 (2) The screw is held in brackets on the bedplate of the machine, the end of the screw and the locknut being visible at the side of t he bracket. bracket. (3) Older machines use pivots without threads and locknuts. These are held in place with screws located on the end of the brackets.
(4) Undo the fixing scre screw. w. Gentl y tap th e end of th e pivot with a nail pun ch t o m ove it towards the connec connecti ti ng r od. Check Check the amou amou nt of m ovement ovement . There should be the barest trace of freedom freedom . Too ti ght and th e machine will run hard. Tighten the screw when adjusted to your satisfaction.
[ 2] 2] I - 9
(6) You w ill see thi s type of fi tt in g on some connections under the bed and in the head. The purpose is to take up any wear which may occur in the bearing by tightening the screw, which decreases the gap visible in t he picture. If you feel this is necessary, be very very careful careful not to overdo it , as as it can make the machine very heavy hea vy to turn .
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