Adler 275 Service Manual

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Part 3: Service manual, cla ss 271 - 275

1. General

1.1 Gauges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.2 Description and adjustment of the integral adjusting disc . . . . . . . . . . . . . . . . . . . . . 5

1.3 Positioning the integral adjusting disc with respect to the arm shaft . . . . . . . . . . . . . . . 6

2. Null point, feed with fitments

2.1 Null-point adjustment (position of stitch-length regulator) . . . . . . . . . . . . . . . . . . . . . 7

2.2 Feed halt when the stitch-length regulator (thrust cam) moves . . . . . . . . . . . . . . . . . . 8

2.3 Lift cam and feed-dog height . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.3.1 Eccentric bush . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.4

2.5

2.6

2.7

2.7.1 Synchronisation of underfeed and roller overfeed . . . . . . . . . . . . . . . . . . . . . . . . . 16

2.7.2 Distance between feed roller and needle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

2.7.3 Feed-roller lift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

2.7.4 Roller pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

2.7.5 Fabric deflector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

2.7.6 Roller-overfeed belt tension . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

2.7.7 Replacing the feed roller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Class 272/27 4: Class 272/27 4: Class 272/27 4: Class 273/27 4:

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

synchronisation of needle feed and underfeed . . . . . . . . . . . . . . . . . 12

distance between needle bar and pressure bar . . . . . . . . . . . . . . . . . 13

aligning the feed dog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

roller overfeed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

3. Foot height and lift

3.1 Pressure-bar height . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

3.2 Mechanical foot lift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

3.3 Electromagnetic foot lift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

3.4 Hinged foot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

3.4.1 Compensating hinged foot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

4. Upper-thread tensioner release

4.1 Thread take-up spring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

5. Bobbin winder

6. Needle-bar height

7. Shuttle adjustments

7.1 Loop lift and distance between shuttle beak and needle . . . . . . . . . . . . . . . . . . . . . . 31

7.2 Shuttle-drive housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

7.3 Bobbin-housing holder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

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Contents Page:

8. Thread clipper

8.1 Control cam for timing the blade movement . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

8.2 Positioning the fixed blade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

8.3 Sharpening the fixed blade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

8.4 Thread-guide plate, adjusting plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

8.5 Hooked blade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

8.6 Cutting pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

9. Class 271/272: thread retractor

10. Class 272: edge cutter

10.1 Replacing the sewing equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

10.2 Adjusting the indicator bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

10.3 Sharpening or replacing the blades . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

11. Class 271: cross-cutter

12. Class 275: differential foot overfeed

12.1 Adjusting the overfeed-foot travel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

12.1.1 Synchronisation of overfeed foot and feed dog . . . . . . . . . . . . . . . . . . . . . . . . . . 51

12.2 Adjusting the overfeed-foot lift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

12.2.1 Adjusting the overfeed-foot eccentric . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

12.2.2 Adjusting the overfeed lift height . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

12.2.3 Position of the overfeed foot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

12.3 Adjustment of the extra-thickness operating lever . . . . . . . . . . . . . . . . . . . . . . . . 55

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13. Replacing the arm-shaft bearing

14. Lubrication

14.1 Oil circulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

14.2 Shuttle lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

15. Control and operating panel

15.1 Control and QUICK operating panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

15.1.1 Changing settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

15.1.2 RESET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

15.2 Control and EFKA operating panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

15.2.1 Changing settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

15.2.2 RESET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

16. Maintenance

17. Summary of all sewing-machine settings

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

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IMPORTANT

The illustrations in this manual are of various classes or sub-classes of the special sewing machine.

Please remember that your special sewing machine may differ from the machine illustrated.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

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. . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

1. General

This service manual describes the adjustment of the special sewing machine, classes

271 to 275

271

272

273

274

275

IMPORTANT

The processe s de s cr i be d i n th i s ma nu al m ay o nl y b e c a rr i ed ou t b y specialist personnel or persons with appropriate training.

Caution: danger of injury

Before all repair, conversion and maintenance work turn off the main switch and isolate the machine from the pneumatic supply.

When carrying out adjustment work and function-testing with the machine runn i ng , c o mp l y wi t h a l l s af et y me as u res a nd ta k e t he utmost care.

single-needle double-lockstitch machine with skipp i ng un de r fe ed

single-needle double-lockstitch machine with skipp i ng un de r fe ed an d n ee dl e fe ed

single-needle double-lockstitch machine with skipp i ng un de r fe ed an d i n te r mittent roller ov e r fe ed

single-needle double-lockstitch machine with skipp i ng un de r fe ed , n ee dl e fe ed an d intermittent roller overfeed.

single-needle double-lockstitch machine with skipp i ng un de r fe ed an d d i ffer en ti a l fo ot ov e rfe ed

This service manual describes the adjustment of the sewing machine in a logical o rde r. It must b e b orne in mind that v a r iou s ad j us t me nt s are mutually dependent. The adjustment process must therefore be carried out in the order given.

For all adjus t me nt s of s ti t c h-forming components a flawles s n ew needle must be fitted.

When adjusting cutting devices the tools must be replaced.

IMPORTANT

All colour- m ark e d c o mp on en ts a r e f ac t ory - se t. These settings sh ou l d not be altered ex c e pt by specialists.

1.1 Gauges

1 2 3

4 5 6

With the ad j ust ment gauges listed below the se wi n g m ac h i ne c an be precisely ad j us t ed an d t es t ed .

item g auge order no. u se

gauge 0216 001069 needle-bar height clas s 27 1/ 27 3

gauge 0272 001240 needle-bar height clas s 27 2/ 27 4

adjusting pi n 9 30 1 0 22 60 8 lock sewing machine in positions A -

gauge 0271 000767 needle-bar height and shuttle-drive housing

with small shuttle ( 0271 000751 / 0271 001991 )

gauge 0271 000766 needle-bar height and shuttle-drive housing

with large s h ut tl e ( 02 71 00 10 21 / 0 27 1 0 02 041 )

gauge Z124 000443 a dj u sti n g e dge cutter clas s 27 2

1.2 Description and adjustment of the integral adjusting disc

3 4

1 2

The sewing ma c hi n e c a n b e l o ck ed i n a l l ad j ustment positio ns w i th locking pin 3 and the integral adjusting disc 4 on the synchronous-belt pulley of the arm shaft.

The adjusting disc has 6 notches which are marked on the handwheel by the letters A, B, C, D, E and F. In conjunc ti o n with marking 2 t he letters indicate the position of the notches in which the machine can be locked wi th pi n 3.

Notch A (loop-lift position) is deeper than the other notches.

The following items should be adjusted in the various positions:

adjusting disc with respect to the groove in the arm-shaft crank, parallelism, belt wheel, loop lift, distance of shuttle beak from needle

feed-dog standstill when stitch-length regulator moves,

classes 271 + 273

foot-overfeed standstill when upper regulator moves

class 275

(

2nd needle position

control cam for thread clipper

needle-bar height, feed-dog standstill when stitch-length regulator moves,

classes 272 + 274

lift cam,

1st needle position

class 275

(feed-dog TDC)

(feed dog TDC).

1.3 Positioning the i ntegral adjusti ng disc wit h respec t to the a rm shaf t

1 2 3

IMPORTANT

Adjustments carried out with the adjusting disc will only be correct if the disc it s el f ha s be en ad j usted as describ ed be l ow. If the arm shaft is moved, all subsequent settings must be checked and adjusted if necessary.

Caution: danger of injury

Turn off the main switch. The position of the arm shaft may only be adjusted with the sewing machine switched off.

Regulation and inspection

The groove 4 an d n ot c h A of the adjust in g disc on the synchronous - b el t pu l l ey m us t c oi n c ide on the

–

Lock the arm shaft with a loc k i ng pi n or a 5 m m Ø p i n i n th e arm-shaft g roo v e 4 ( th rough hole 3).

–

It must be possible to pass the locking pin through the hole 2 in position A into the integral adjusting disc.

Adjustment

–

Remove bobbin-winder cover 1.

–

Undo the screws o f s yn c hro no us -b el t pu l l ey 6 fr o m a bov e w i th th e Allen key 5 t hro ugh the hole.

–

Lock the syn chr o no us -b el t pulley in posi ti o n A with the locking pin.

–

Insert a 5 mm- th i ck pi n i nt o t he r i g h ol e 3 a nd al l o w it to engage in the arm-shaft groove 4.

–

Tighten the screws on th e s y n chr o no us -belt pulley 6 . The synchro no us -b el t pulley must not be axially sh i ft ed .

X - Y

line.

5 6

2. Null point, feed with fitments

2.1 Null-point adjustment (position of stitch-length regulator)

Regulation and inspection

With the sti tc h - len gth lever 4 or the ad j us t i ng wh ee l s 5 in their null positions the fe ed do g a nd ne ed l e m ust no t m ov e wh en th e h an dw he el is turned.

Caution: danger of injury

Turn off the main swit ch. The feed null - po si ti o n m us t on l y be ad j usted with the ma chi n e switched off.

Adjustment

–

Set the stitch-length lever 4 or adjusting wheels 5 to "0".

–

Undo screw 3.

–

Insert screwdriver into hole 1.

–

Rotate guide 2. The feed must not operate when the handwheel is turned.

To increase the forward feed: turn in the + arrow directio n To decrease the forward feed: turn in the - arrow direction

–

Retighten s cr e w 3 .

2.2 Feed halt when the sti tch-lengt h regulator (thrust ca m) moves

Regulation and inspection

With the sewing machine locked in position B ( position E ( must be no feed movement when the stitch-length regulator 2 is moved.

class 272/274

) and the stit c h l e ng th at ma x i mu m, th er e

class 271/27 3/ 27 5

) or

Caution: danger of injury

Turn off the main switch. The feed standstill may only be adjusted with the sewing machine switched off.

Adjustment

–

Set the stitch length to maximum.

–

Undo both screw s of th r ust c am 1.

–

Lock sewing ma c hi n e:

class 271/27 3/ 27 5 class 272/274

–

Rotate thrust cam 1. When the st itc h - l en gt h regulator 2 is mo v ed th e f eed dog must remain at a halt.

–

Retighten both screws of thrust cam 1. This must place the thrust cam 1 hard up against the bearing (axial shaft position).

in position

B E

2.3 Hub cam and feed-dog height

Regulation and inspection

With the sewing machine locked in position B ( position E ( connecting rod 8 must be in line.

In its highes t po s i ti o n t he fe ed do g s h ou l d p r ot rud e b y 0. 9 o r 1. 1 m m i n the region of t he needle hole:

Caution: danger of injury

Turn off the main swit ch. The lift cam and feed-dog height may only be adjusted with the sewing machine turn ed off.

Lift-cam adjustment

–

Undo both screws of the lift cam 7.

–

Lock the sewing machine:

class 271/273/275: class 272/274

–

Rotate lift cam 7. The markings 3 and 6 must be in line.

–

Retighten both screws of lift cam 7.

class 272/274

0.9 mm with a fine-toothed feed dog

1.1 mm with a coarse-toothed feed dog.

: in position E.

) markings 3 an d 6 of the lift cam 7 an d t he

in position

class 271/273/275

) or

Feed-dog height adjustment

–

Lock the sewing machine:

class 271/273/275 class 272/274

–

Undo screw 1.

–

Rotate eccentric bolt 2. In its highes t po s i ti o n t he fe ed do g s h ou l d p r ot rud e b y 0. 9 o r

1.1 mm in the re gi o n o f the needle hole :

0.9 mm with a fine-toothed feed dog

1.1 mm with a coarse-toothed feed dog.

The position of the eccentric bolt 2 depends on the adjustment of eccentric bush 4 in the advance lever 5. See section 2.3.1.

–

Retighten s cr e w 1 .

: in position

: in position E.

Fig.: A

Fig.: B

Fig.: C

Fig.: D

2.3.1 Eccent ri c b us h

Regulation and inspection

Class 271/273/275

The eccentri c bu s h 1 i s ad j us t ed at the factory so th at at dog is paral lel t o t he ne ed l e- p lat e s u r fa ce. In th e b as i c p os i t i on th e sl i t is horizontal When the feed do g e me r ge s fro m t he needle plate it s ba c k en d emerges firs t.

When the slit of the eccentric bush is in the feed dog emerges from the need l e p l at e i n para l l el . Thi s av oi d s stretching the material. This is particularly important with stretch material or ma te ri al w hi ch i s ine l as t ic i n t he wa rp a nd we ft di re c ti o ns but which stretches when sewn in the diagonal direction.

When the slit of the eccentric bush is in the up position, t he feed dog is at a greate r an gle This angled emergence improves "smooth sewing" with inelastic material su ch a s po pl i n an d c e rt a in l i n i ng ma te r i als . If necessary th e eccentric bush can also be placed in intermediate positions.

Class 272/274

The eccentri c bu s h 1 i s ad j us t ed at the factory so th at at dog has a sli gh tl y r e arwards slope. In th e b as i c p os i t i on th e sl i t i s at an angle of 45° to the horizo nt al

(Fig. A)

(Fig. C)

down

position

when it emerges from the needle plate.

(Fig. D)

TDC

(Fig. B)

TDC

the feed

, the

the feed

IMPORTANT

If the eccentr i c b ush has been altere d, th e f ee d- d og he i gh t m us t be re-adjusted (see section 2.3).

Caution: danger of injury

Turn off the main swit ch. The eccentric bush may only be adjusted with the sewing machine switched off.

Adjustment

–

Undo screw 2.

–

Adjust eccentric bush 1.

–

Retighten s cr e w 2 .

2.4 Class 272/274: synchronisation of needle feed and underfeed

1 2 3 4

Regulation and inspection

The needle fe ed an d underfeed are f actory-set to be e qu al .

–

Set stitch l e ng th to ma x i mu m.

–

Check synchro ni sa ti o n b y tu rni n g t he ha nd wh ee l.

5 6 7 8

Caution: danger of injury

Turn off the main switch. The needle feed and underfeed may only be adjusted with the sewing machine switched off.

Adjustment

–

Remove bobbin-winder cover.

–

Check that groove 4 of shaft 1 and slit 2 of block 3 are in line. If not, turn shaft 1 until they are.

–

Undo locking screw 8.

–

6 8

Turn eccentric bolt 6. Groove 5 and slit 7 must be in the position shown in the illustration. The synchro ni s a tion of needle feed and underfeed is se t.

–

Retighten locking screw 8.

With feed-critical material, in order to reduce any displacement of the fabric layers which may occur, the needle feed can be set up to some 15% greater than the underfeed by turning eccentric bolt 6. Turning it by 180° produces the maximum adjustment. The distanc e be tw ee n t he needle bar and pre s s ure bar remains at 9 mm during th i s ad j ustment.

If the eccentric bolt is adjusted by less than this, the distance between the needle bar and pressure bar must be re-adjusted.

IMPORTANT

When the nee dl e fe ed i s i nc r e ase d the needle must no t t ouch the sides of the needle hole in the feed dog.

2.5 Class 272/27 4: dista nce betw een needle bar and pres sure bar

9 mm

Regulation and inspection

When the stitch regulator is at "0", the distance between the needle bar and pressu r e b ar sh ou l d b e 9 mm.

Caution: danger of injury

Turn off the main swit ch. The distance may only be adjusted with the sewing machine switched off.

Adjustment

–

Set the stitch regulator to " 0 ".

–

Undo locking screw 2.

–

Swivel the ne edle-bar guide. Use gauge 1 to ad j ust the distance be tw ee n t he needle bar and pressure bar to 9 m m.

gauge 1 order no.: 02 71 00 07 67

–

Tighten locking screw 2.

2.6 Class 272/274 : aligni ng the feed dog

Regulation and inspection

The needle should enter the centre of the feed-dog needle hole if the distance be tween the needle b ar a nd pr e s sur e ba r is c orr e c tl y s e t t o 9 mm.

Caution: danger of injury

Turn off the main switch. The feed dog ma y on l y be ad j us t ed wi t h t he s ew i ng ma c hi n e s w i tc h ed off.

Adjustment

–

Undo locking screw 2 of the advance lever 1.

–

Align feed do g. The needle should enter the centre of the feed-dog needle hole. The distance between the feed dog and the needle plate should be equally large at each side.

–

Retighten locking screw 2.

2.7 Class 273/ 274: r oller overfe ed

Regulation and inspection

The feed roller 3 is automatically lifted when the sewing foot is raised and for bar-tacking. This function must be entered in control field 5. See setting-up instructions, section 12.

The maximum f ee d l e ng th of th e i n te r mi t te nt r ol ler overfeed is 7 m m. The feed length can be adjusted independently of the underfeed with adjusting wheel 4.

With the basi c stitch length a t 4 mm th e threaded pin 6 l im i ts t he maximum rol ler - o ver f ee d f ee d l e ng th to 5 mm.

1 = lever raises the feed roller 2 = button automatically lowers feed roller

the functi on is en te r ed at th e c o nt r ol f i eld

Caution: danger of injury

Turn off the main swit ch. The feed length may only be adjusted with the sewing machine switched off.

Adjusting the maximum feed length

–

Remove threaded pin 6. The maximum f ee d l e ng th i s i ncr e as e d t o 7 mm .

IMPORTANT

Account must be taken of the machine’s basic sewing equipment.

Adjusting the raising and lowering function

–

Set the des ir ed fu nc t i on at th e c o nt r ol f i eld . (See setting-up instructions, section 12).

2.7.1 Synchronisation of underfeed and roller overfeed

Caution: danger of injury

Turn off the main switch. Synchronisation may only be adjusted with the sewing machine switched off.

Regulation and inspection

The operation of the underfeed and roller overfeed should be synchronised. On no account may the movement of the overfeed roller be completed before that of the feed dog.

This ensure s th at th e m at er i a l be tw ee n t he sewing foot an d the roller remains under tension, thus minimising seam-crimping when the stitches a re tightened.

–

Remove bobbin-winder cover.

–

Lock the sewing machine:

class 273: class 274

–

The groove 4 o f t he c am 2 a nd th e g r oo v e 3 of th e c o nn ec t i ng rod 1 must coincide.

Adjustment

–

Remove locki ng pin .

–

Undo fastening screws of cam 2. It should be possible to rotate the cam on the shaft with minimum effort.

–

Secure cam 2 with a screwdriver.

–

Turn handwheel:

class 273: class 274:

–

Retighten fastening screws of the cam 2.

–

Check that groove 4 of the cam and groove 3 of the connecting rod coincide. If not, the ad j us t me nt must be repeated .

–

Replace bobbin-winder cover.

: in position

in position

to position to position

B E.

2.7.2 Distance between feed roller and needle

28,5 mm

Regulation and inspection

The distance between the centre of the roller and that of the needle is

28.5 mm. Where a compensating hinged foot is fitted the distance is 30 mm.

IMPORTANT

When the distance is reset the upper and lower end positions must also be re-adj u s te d ( se e s e c ti o n 2 .7 .3 ) .

Caution: danger of injury

Turn off the main swit ch. The distance may only be adjusted with the sewing machine switched off.

Adjustment

–

Undo screw 1.

–

Turn link 2 on the axle. The distanc e b et we en th e c e nt r es o f t he r ol le r an d t he ne edle must be 28.5 or 30 mm.

–

Retighten s cr e w 1 .

2.7.3 Feed-roller lift

2 3 4

Regulation and inspection

In the sewing foot.

In the needle plate, the link 1 must encounter elastic resistance about 1 mm before the hand-lever stop reaches its limit position.

If a position. T h e s t ee l rol l e r must not make co nt ac t wi t h th e ne ed l e pl a te , which it would damage.

upper end position

lower end position

steel roller

is used there must still be a gap in the lower end

the lifted f ee d ro l l er m ust not touch the

, after the roller has been placed on the

Caution: danger of injury

Turn off the main switch. The lift may only be adjusted with the sewing machine switched off.

Adjusting the upper end position

–

Rotate bolt 2. The slit of the bolt must be parallel to the cylinder axle.

–

6 7

Limit the stroke of cylinder 3. Use a 2.5 mm A l len key to adjust the thre ad ed pi n 7 ac c o rdi n gl y.

6 = access to threaded pin 7

Adjusting the lower end position

–

Undo locknut 4.

–

Screw threaded pin 5: in: to raise out: to lower.

–

Retighten locknut 4.

2.7.4 Roller pre ssure

3 4

Regulation and inspection

The feed-roller pressure must be suitable for the material being sewn.

2.7.5 Fabric deflector

IMPORTANT

If the pressure has been altered the upper end position must be re-adjusted (see section 2.7.3).

Caution: danger of injury

Turn off the main swit ch. The roller pressure may onl y be ad j ust ed with the sewi ng ma c hi n e switched off.

Adjustment

–

Undo screw 2.

–

Move cylinder 1: in the direction of arrow in the direction of arrow

–

Retighten s cr e w 2 .

Regulation and inspection

The function of th e f abric deflecto r 3 i s t o p r ev e nt th e m at er i a l fr o m getting int o t he ga p. T he pre s s ure of the fabric de fl e cto r on th e r oll e r should be such that the roller can only just rotate freely. If a steel roller is fitted, the fabric deflector must be removed.

A: B:

to reduce pressure to increase pressure.

Caution: danger of injury

Turn off the main swit ch. The fabric deflector may only be adjusted with the sewing machine switched off.

Adjustment

–

Undo screw 4.

–

Adjust fabric deflector 3.

–

Retighten s cr e w 4 .

2.7.6 Roller-overfeed belt tension

4 5 6

Regulation and inspection

The tension in the synchronous belts should so be such that the step lengths are precisely tran smi t te d.

Excessiv e b el t te ns i o n can cause heavy wear and malfun c ti o ns.

Caution: danger of injury

Turn off the main switch. The upper and lower belt tension may only be adjusted with the machine turned off.

Adjusting the upper synchronous belt

–

Undo screw 2.

–

Move lever 3. Adjust the t ension of the syn c hr o no us b el t 1 a s req ui r e d.

–

Retighten screw 2.

Adjusting the lower synchronous belt

–

Undo screw 6.

–

Move lever 5. Adjust the t ension of the syn c hr o no us b el t 4.

–

Retighten screw 6.

2.7.7 Replacing the feed roller

1 2 3

45678

IMPORTANT

If a Vulkollan roller is replaced by a steel roller or vice versa, the lower end position mu s t b e r e -adjusted (see s ec t i on 2. 7. 3) .

If a steel rol l e r i s fi t te d, th e f abric deflecto r must be removed. If the 15mm-wide rubber roller is being used, the broad fabric deflector

(order no.: 0273 000620) must be fitted.

Caution: danger of injury

Turn off the main swit ch. The feed roller must be repla c ed wi t h t he s ew i ng ma c hi n e s w i tc h ed off.

Replacing the roller

–

Remove nut 1.

IMPORTANT: this nut has a left-handed thread.

Lock axle 3 a t t he ot he r en d w i th a s c re w d ri v er.

–

Replace fe ed rol l e r 2.

–

Replace nut 1.

item order no.: description

4 0933 005763 steel roller 9 mm 5 0933 005737 steel roller 15 mm 6 0933 005738 a steel roller 15 mm, 2 mm saw-tooth 7 0933 005737 a rubber rolle r 15 mm 8 0933 005725 Vulkollan roller 9 mm

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