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PFAFF
creative 7550
Service Manual
Page Table of contents
Foreword
Notes on
the sewing machine
Service Manual
Feeding system
Specifications
I 2 3 4
1. 2. 3 4 5. 6. 7. 8.
Adjustment of toothed belt tension Adjustment of feed-dog driving shah in sideways direction Timing of feed motion AdJustment of feed dog In sideways direction Adjustment of synchronlzer Adjustment of presser bar height Adjustment of Adjustment of top
4a. Adjustment of feed dog height
Zlgzag
top feed foot in feed height mechanism
sewing direction
7 8 10 12 14 16 18 19 20 22 25 28 28 30
Stitch forming perts
9. Adjustment of needle I n needle hole
Position of needle in needle hole in sewing direction Adjustment of hook-to-needle clearance Adjustment of bevel gears Sewing
1 0. 11. 11 a 12. 13. 14. 15. 16. 17. 18. 19.
hook timing
Adjustment of needle bar height Adjustment of bobbin case position finger Adjustment of needle threader Adjustment of
Stitching off
32 33 34 35
36 36 38 40 42
Adjustment of needle thread tension
bobbin winder stop Adjustment of bobbin thread tension
Adjustment of equal forward and reverse stitch length
Adjustment of thread check spring stroke
21. Making up a sewing sample
Repeir instruc:tlona
20.
22. 23. 24. 25. 26. 27. 28. 29.
Dismantling and assembling the needle thread tension Dismantling and assembling hook
Changing the pressure spring In the handwheel release
43
44 46 46
the sewing Cleaning and oiling the machine Changing the toothed belt
Changing the bevel gears Changing the base circuit board Changing the thread monitor Changing the control
48 54
60 62
30. 33. 34.
panel
with free-arm cover
31. Changing the synchronizer 32. Changing the motor
Changing the motor circuit Changing the
64 68
70 72 73 74 76
35. Changing the cable reel in the foot control 36. Changing the stepping motor for sideways needle bar movement 37. Changing the lower stepping motor for the feed movement 38. Changing the stepping motor for transverse drive 39. Changing the buttonhole sensor 40. Important key functions of class 7550 41. Self-test table for class 7550 42. Separate buttonhole sensor test for cl. 7550 43. Replacement list: self-test 7550 44. Fault-finding chart for the electronics of Pfaff Creative 7550 CO 45. Fault table for electrical parts 46. Test table for creative designer 47. Electrical safety test 48. Electrical safety test with ABB Metrawatt M5013 49. Stray current test of complete motors 50. Measures required In case of inadmissible test readings
motor pinion
board
84 90 94
98 99 102 103 104 104 107 109 111 114 114
Foreword
This service and repair manual is intended to assist you in carrying out all repairs to the machines quickly and correctly. Adjustment should only be carried out if you find the aclual settings deviating lrom thE: requirements described here. When checking or adjusting a machine, please always proceed in the sequence specified. For easier reference every workstep is marked with a dot. Differing worksteps are marked with a circle or square.
. ·
The indications .right", .left· top·, .bottom·, .front· or .rear· always refer to the upright machine with its controls facing the operator. When assembling dismantled machines, make approximate adjustments right in the course of work. This facilitate subsequent precise adjustments. If not specified otherwise, the handwheel must always be turned to the front. Always pull out the mains plug before making repairs at live parts or in their vicinity. An electrical safety test must be carried out after every repair, including mechanical ones.
According to the German law on safe machine operation of June 24, 1g58, VDE regulations apply as offtcial rules in electrical engineering and as such are basic to electrical safety tests of technical devi ces. The required electrical tests for appliances are set forth in Para 3 of the Regulations for Repair, Modifi cation and Testing of Used Electrical Devices (VDE 0701, edition 9.71). After every repair of electrical devices we manufacture, a test In accordance with VDE 0701 is obligatory. Outside Germany, there are similar regulations In force, which are largely Identical with the require ments of VDE 0701. For repairs of electrical devices, it Is therefore by all means required to consult an expert Needle rise gauge Needle rise clamp Spacer Adjustment gauge for bobbin case position finger Sewing foot gauge Pointer gauge Pin gauge Combination spanner (wrench) 5.5 mm Combination spanner (wrench) 6.0 mm Torx screwdriver TX 10 Torx screwdriver TX 15 Torx screwdriver TX 20 Torx screwdriver TX 25 Torx offset screwdriver TX 15 Torx offset screwdriver TX 20 Clrcllp fitting tool 2.3 kz Clrcllp frtting too l 3.2 kz Circlip tting tool 4.0 kz if Circlip fitting tool 5.0 kz Circlip fitting tool 6.0 kz Circlip fitting tool 10.0 kz Spring hook Motor extension cable Subject to alterations In design and dimensions. For correct adjustment of the machines, the following gauges and tools are required:
00-870136-01 00-870137-01 63-10218 00-880133-01 63-114690-39 63-114690-23 63-114690-09 43-11101()-04 07-433007-50 07-434008-44 07-434008-45 07-434008-46 07-434008-47 07-434008-74 07-434008-75 07-437003-20 07-437003-30 07-437003-40 07-437003-50 07-437003-60 07-437003-86 07-437006-00 29-924800-84
2
Notes on the sewing machine with regard to ambient conditions, treatment, cleaning and safety
Ambient conditions: The recommended ranges are: Ambient temperature Air humidity
20 'In to 80 %
1C1' to 40"C (50' to 104°F)
This machine Is a high-quality electro-mechanical device. 11 Is designed for household purposes and should always be supervised when In use. Make sure that it is not subjected to: dust, severe dampness, direct sunlight. static electricity, heat-producing objects, corrosive chemicals or liquids. The machine must be used on a free surface, for ventilation purposes, which is both firm and even.
Treatment: Always protect the machine against damage by hitting or dropping. Cleaning:
Housing: To clean the housing, use a dry, clean and soft cloth which is free of fluff. To remove any stubborn dirt, use a soft cloth with a neutral cleansing agent for plastic materials.
Please note! Do not use any Insecticides the housing.
or
chemical products such as petrol (gas) or thin chemicals for cleaning
Display:
H necessary, clean display with a soft cloth moistened with a little water. Safety:
1. The machine must be put into operation according to the indications on the specification plate. 2. Do not place any objects In openings on the machine. 3. Do not use the sewing machine if:
- there Is a visible damage, - its function is disturbed, - it is wet. e.g. with condensation. 4. Do not pull the mains plug out of the socket by its cord.
we will not accept any liability for any damage caused.
5. If this appliance Is used for another purpose than that intended or if it is wrongly operated,
6. To avoid the risk of electric shock, do not open the machine. There are no parts inside the machine which the user can repair. This is solely the responsibility of our qualified service staH.
7. Be sure to use only original PFAFF parts.
3
Specification of the PFAFF 7550 CD
· Electronic free-arm utility and fancy stitch machine
Electronic stitch pattern storage Pattern sequence memory ( M-memory) MO to M 31 There are 32 M-memories or pattern sequences. In each of the pattern sequences a maximum of 85 patterns or programs can be stored. · Program memory (P-memory) There are 30 P-memories for freely programmable patterns (PO to P29) A maximum of 999 stitches can be stored in each of the 30 P-memories. A maximum of 20350 stitches can be programmed, distributed over all 30 P-memories.
· ·
· 8 bit processor with 256 byte RAM and 4 Kbyte ROM. e 8 bit processor with 256 byte RAM and two external memories. e Memory I with 512 Kbyte ROM. e Memory 11 with 32 Kbyte RAM with battery back-up e Zigzag stitch width 0 to 9 mm with 27 full steps or 54 half steps. e Stitch length 0 to 6 mm forwards and 0 to 6 mm reverse with a total of 36 full steps or 72
= =
Memory 11 retains its data when the machine is switched off.
· e e e e e · · · · · · · · ·
half steps. A full step is 0.33 mm and a half step 0.166 mm. 19 different needle positions can be set. One 7.5° stepping motor for needle zigzag motion (contact current switching controller). One 7.5° stepping motor for feed control (contact current switching controller). Transverse feed amount of 1 mm each to the right and left. with 30 full steps each. One full step has 0.033 mm. One 7.5° stepping motor fo.r transverse feed motion (contact current controller). 3-track synchronizer. Electronically controlled take-up lever "up" (needle "up· positioning) or needle "down· position with
Key with LED indicator for half speed (540 r.p.m.) Key with LED indicator for tying off stitch patterns or for determining buttonhole lengths. Key with LED indicator for permanent or, without indicator light, for brief reverse sewing. Bobbin thread monitor with LED indicator. Digital motor control with 950 r.p.m. max. speed. Several pattern-dependent reduced speeds in addition. · Graphic LC display with 240x64 pixels. · When machine is blocked, 'the motor is switched off automatically after 2 to 3 s by an anti-blocking
device.
LED display.
High-ohm foot control (cold) with automatic-rewind cable. Motor fuse 2 A/F. Automatic indication for battery change when machine is switched on. 2 batteries (2 Mignon cells, 1.5 V type L.R. 6). FM radio and TV screened, approval marking, suppression degree B. Safety-class 11 with GS test marking. Master switch for motor, electronics and Indicator lamps. Glare-free built-in sewing lamp (indicator lamp} 220 V or 1 1 0 V 15 W. Bobbin winding possible during sewing. Pendulum-type needle bar ·frame. · Transmission of drive from .arm shaft to lower shaft by toothed belt. transmission ratio 1 :1. · Automatic switchover to bobbin winding (computer-controlled). · Power input rating: 110 W when sewing at 950 r.p.m.; 50 W when stationary.
· · · · · · · · · ·
4
· Lockstitch of types 301,302, 303, 304, 305, 308 and all other variants obtainable by sideways needle movement or forwards and reverse control of the machine feed. · PFAFF transverse double-rotating hook. · Link ake-up. · Slide lever feed regulator for forwards and reverse stitch lengths. · Dual fabric feed. · Disengageable feed dog. e Drive from motor to handwheel by flat toothed bell. · 0 to 950 stitches per minute. · Sintered metal bearings. · Oil for sintered metal bearings: BP Energoi HLP 46 or HLP 80 No. 28-036550-09. · Oil for sewing hook No. 91 -1 29452-91 . · Clear workspace: 173, 113. 203 mm. · Machine height: 277 mm. · Base plate dimensions: 386. 153 mm. a Free--arm dimensions: 76, 49, 196 mm. · Hous·ing material: aluminium alloy. · Weight of sewing head: 8.640 Kg. · Needle system 130/705
·
Additional needle system classifications: Twin needle Wing needle Twin hem stitching needle Long needle eye Stretch needle Jeans needle Suffix=Zwi Suffix=Wing Suffix =Zwi-Ho Suffix= N Suffix=PS Suffix=J
· Possible needle points:
Small ball point Medium ball point Large ball point Pointed cloth point Leather point right hand
Suffix=SES Suffix=SUK Suffix=SKF Suffix=J Suffix=LA
tSpecifications and versions of bullt·ln motors for the PFAFF 7550 CD Type uus 390 No. 902-1039-001 Radioscreened according to EN 55014 uus 393 No. 902-1039-003 Radioscreened according to EN 55014 50/60Hz 6600 r.p.m. 220-240V 37W Safety class 11 50/60Hz6600 r.p.m. 1 1 0-120V 39W Safety class 11
Type
5
Notes
6
Feeding system
1. Adjustment
of toothed belt tension
Requirement: The toothed belt must be so taut that the sewing hook has no play in its rotating direction, but it must be possible to turn the machine easily.
Adjustment:
1 (fig. 1 ). · Re-position tensioning roller 2 wl1h a screwdriver accordingly. · Tighten screw 1 .
· Loosen screw
Check: · Check adjustment according to the .Requirement". · Press lightly against middle of toothed belt (250 g). The belt must move 1 to 3 mm inwards (tig. 1 ).
Fig.t
7
2. Adjustment of feed dog driving shaft in sideways direction
Requirement: The clearance between driving-shaft bush 4a and left housing edge 3a must (ltg 2a)
be:
3.0 mm
Check: lt must be possible to insert adjustment gauge 00-880133-01 easily, but without play, between the feed-dog driVing shaft and the left housing edge.
Note: This adjustment must only be carried out when compelling reasons exist.
Adjustment: · Disconnect mains plug from mains socket · Remove needle and sewing fool. · Tilt the machine over backwards. · Remove the baseplate and the bobbin thread monitor. · Remove five-wire flat cable 126 complete with the buttonhole sensor. · Take seven-wire flat cable 200 of the transverse-drive stepping motor out of the cable duel. · Dismantle transverse-drive stepping motor according to section 38. · Disconnect spring 14 (fig. 2b) · Scr ew out screw 18. · Turn the handwheel until the lobe of driving eccentric 20 faces rear. · Fold cam lever 9 down and remove it with link 10 to the left, pulling them oft the connecting bar rod. · Remove slide block 12 with spring to the right. · Loosen screw Sa (fig. 2a). · Pull out pin Se to the rlghl · Loosen screws 3 and 7. · Re-position driving shaft S together with the two cylindrical pins 4 and 6 sideways without play until there Is a clearance of 3.0 mm at the left side, as described In "Requirement" (fig. 2a). · Tighten screw 3. · The pressure of the right cylindrical pin must be 1 kg. · Tighten screw 7. · Fit pin 5c without any play and tighten screw Sa. · Disconnect spring 8 . · Remove the needle plate. · Use your finger to pull the feed dog to the front. then release il · The complete feed driving shaft S must slide slowlY to the rear. · Loosen screw 1 72 (fig. 2c). · Move the top feed lever assembly to the front and rear. · The complete top feed lever assembly must move easily and without binding (If necessary remove cause of binding). · Re-position crank pin 173 with pull rod 171 sideways until the complete top and bottom feed moves easily. · Tighten screw 172 and check again wheter the feed system moves freely. · loosen screw 16 (fig. 2b). · Push slide lever shaft 1S complete with stepping motor 17 about 1 mm to the right · Push slide block 12 with spring onto the pin and install it in slide way 13 in the correct curve radius. · Check whether slide block 12 can be moved easily, but without play or binding, within the slide way. · Push slide lever shaft 1S with stepping motor 17 carefully to the left until there Is a clearance of 0.05 mm between slide block 12 and connecting bar 1 1 . · Tighten screw 16 and check whether the slide block moves easily and without play. · Push link 10 complete wi cam lever 9 to the right onto the connecting bar pin. th · Push cam lever 9 to the rear, and then upwards over feed eccentric 20. · Insert screw 18 in stud 19 and tighten lt a little. · Move stud 19 sideways until link 10 and connecting rod 1 1 still have a slight play and move easily. · Tighten screw 18. · Connect the two springs 8 and 14 (fig. 2a and 2b).
8
e · e e C e
Check whether pull spring 199 of the transverse-drive stepping motor is engaged at the feed dog. Connect pull spring 199 to the transverse-drive stepping motor and fit the motor. Tighten the three Philips screws 201 a little (fig. 2a). Insert five-wire llat cable 126 complete with sensor. Place seven-wire flat cable 200 in the cable duel Fit the needle plate.
Note: Adjust transverse-drive stepping motor according to section 4.
8
I I I
201
201 b
I I
5c
7 Fig. 2a
0
Fig. 2 Fig. 2b
Fig. 2c
I I I 172 171
9
3. Timing of feed motion
Operating sequence:
When lihe rising needle has left the fabric, the feed dog moves up above the needle plate. take-up lever is in its highest position (t.d.c.). movement). After completing the feeding movement. the feed dog moves down under the needle plate surface and the needle enters the fabric. Underneath the needle plate the feed dog moves back to its ba.sic position. The risen feed dog pushes the fabric to the rear. Shortly before the end of the feeding motion, the At a stitch length setting of 6 mm the feed dog now pushes 0.7 mm more to the rear {after-feed
Whenever the stepping motor changes the sewing direction from forward to reverse sewing, the feed dog must be positioned 0.3 mm below the needle plate surface on its way downwards.
Requirement:
the two pins of pin gauge 63-114 690-09 simultaneously in the holes of the feeding eccentric and the When the needle bar has moved 2 mm up from its lowest position (b.d.c.),
it must
be possible to insert
stud (fig. 3).
Check: e Remove the needle.
· Turn the handwheel to set the needle bar at its lowest position. · Set the spacer (63-102 600-18) onto the needle bar and push it up against the needle bar frame.
e Push the needle-rise clamp (00-870 137-01) on the needle bar and tighten it lightly. e Push the 2 mm feeler gauge {00-870 136-01) with its cutout on the needle bar above
the neeclle-rise clamp.
e Loosen the needle-rise clamp and push the 2 mm feeler gauge up against the spacer.
· Tighten the milled screw of the needle-rse clamp (fig. 3a). i · Turn the handwheel to and fro a little. · If there is play at the feeler gauge, repeat this procedure.
(fig. 3b).
e Remove the 2 mm feeler gauge. e Turn the handwheel in sewing direction until the needle-rise clamp Is up against the spacer e Tilt the machine over backwards. e Hold the handwheel in this position while at the same time inserting the pin gauge in the holes
of feeding eccentric 20 and stud
22
(fig. 3).
Timing: · If the adjustment
is not correct. remove the needle-rise clamp.
e Loosen the three screws 23 in the lower toothed-belt sprocket
· Re-fit the needle-rise clamp and repeat the procedure as described in .Check" until the needle bar
has
· Tu m the long drive shaft 2 1 in sewing direction until
moved upwards by
(fig. 3).
2 mm and the clamp is in contact with the spacer (flg. 3b).
both holes
it is possible to Insert the pin gauge in
e Insert the pin gauge and tighten screw 23. Cross-check:
· Remove the pin gauge.
e Tighten all three screws 23 very firmly. e Check again with the needle-rise gauge and the pin gauge as described under .Check".
10
Fig. 3b
16 f3
I
,.. ,
,
!?0
-----
1
l'....
tO-
ts ----ts
·
I I 20
9
, I
t9
,
Requirement: In stitch program "00", the distance of the feed dog to the right and left. edges of the feed slot must be equal (fig. 4). Check: In stitch program ·oo·. carry out visual check of the feed dog position. Note: This adjustment must only be carried out when compelling reasons exist Adjustment: · Remove needle and sewing foot. e Unscrew baseplate and bobbin thread monitor, but leave all electrical connections in place. · Switch on master switch. · Set 6 mm stitch length in stitch program ·oo·. · Turn handwheel by a complete turn. · Loosen the three Philips screws 201 (fig. 4a) and turn the transverse-drive stepping motor until the feed dog is centered in the feed slots (fig. 4). · Lightly tighten the 'three Philips screws 201 (fig. 4a). Crou-check: · Press the staggered-stitch key. · Press key "3" for maximum feed. · Turn handwheel 8111d check the distance of the feed dog to the left and right edges of th" ·
4. Ad justm ent of feed dog in sideways direction
12
Fig.4
Fig. 4a
13
4a. Feed dog height
Requirement: In the highest position of the feed dog, the points of its teeth must protrude above the needle plate sur face by 0 85 to 0.9 mm (fig 4 ). The tolerance must not remain under or exceed 0.85 to 0.9 mm. Check:
· Remove the needle.
e Remove the sewing fool e Switch on the master switch. · Set stitch pattern ·oo· and stltch length "6.0". e Place pointer gauge 63-114690-23 on the needle plate so that feeler lever 27 rests on the needle plate just right of the cutout (fig. 4a). e Turn the hexagon with a 6 mm spanner (wrench) slightly until pointer 26 Is exactly at "0".
· Move the gauge to the left to set feeler lever 27 on the feed dog (fig. 4b).
e Turn the handwheel until pointer 26 has moved up to its highest position. The pointer must now point exactly at mark 0.9.
Adjuatrnent:
· Leave the pointer gauge on the needle plate.
· Loosen screw 24 by just 1/8 of a turn {fig. 4c).
e Remove baseplate and bobbin thread monitor, but leave all electrical connections in place. e Turn the handwheel until the feed dog Is In its highest working position.
e Turn eccentric stud 25 until the eccentric Is facing the rear part of the housing (basic position). e Turn eccentric stud 25 counter-clockwise until pointer 26 is exactly at mark 0.9 (fig. 4b). e Tighten screw 24 {fig. 4c). Cron-check: e Turn the handwheel until pointer 26 Is In its highest position again. The pointer must nov be at mark 0.9. (fig. 4b).
· Lower the feed dog and check the function.
14
lW;;
Rg. 4
w
rr I] re
-
27 I I
I; c 1-=
r
-
Uio
=
26 I I I I I I I I
o.-
...I..T
1 r .=:J"
-
Flg.4a
I
w
t;J I r
lliio
=
27 I I
!r l
I
l.,_
Rg.4b
-c::r
c;
[
l...J.._J
l[l J
25
I 0 I ...___
'
.. . .. .
Flg.4c
15
5. Adjustment of synchronizer
Note: The following machine positions or functions are controlled by the synchronizer: 1. A change of feeding direction and change of stitch length 2. Sideways needle bar movement 3. Take-up lever/needle "up" positioning 4. Needle "down· positioning This adjustment must only be carried out when compelling reasons exist! 11 must be performed with maximum accuracy . Requirement: A change of feeding direction or stitch length must take place when the feed dog has moved below the needle plate surface by 0.3 +1- 0.02 mm (fig. 5). Check:
· Remove the needle. · Remove the sewing foot.
· Switch on the master switch.
· Set stitch pattern ·oo· and stitch length "0.5". · Set pointer gauge 63-114690-23 on the needle plate so that feeler lever 27 rests on the needle plate just right of the feed slots (fig. Sa). · Turn the hexagon with a 6 mm spanner (wrench) until pointer 26 is exactly at ·o·. · Turn the handwheel a full rotation forwards, then keep on turning it until the feed dog (needle bar)
is in its top position.
· Change the stitch lenght. e Set the pointer gauge with feeler lever 27 to the left on the feed dog (ftg. 5d). · Turn the handwheel very slowly forwards until pointer 26 is at 0,3 (fig. Se). In this position the feed
dog must make a visible and audible (switching) movement
V
I
? !l
jo
r:r
=
I I
Fig. 511
I
I f
....... u0
Flg.5b
16
Adjustment:
& Loosen fixing collar screw ·
·
Leave the pointer gauge on the needle p late. Unscrew the baseplate, but leave all electrical connections in place.
· ·
33 by just 1/8 of a turn (fig Sb and 51). Set the stitch length at ·o.s-. Turn the handwheel a full rotation forwards, then keep on turning it until pointer 26 is at 0.3 (f1g. 5e).
Turn short plastic shaft 32 with a 5.5 mm spanner (wrench) in sewing direction until the mark faces the rear side of the mach1ne (fig. Se).
· Set the stitch length at ·oo·.
· Keep on turning short plastic shaft 32 very slowly until the stepping motor switches.
· Tighten fixing collar screw 33 and remove the spanner (wrench).
Check: · Set the stitch length at
·
"0.5".
T1urn the handwheel a full rotation forwards, then keep on turning until the feed dog (needle bar) is In its top position.
· Set the stitch length at ·oo·. · Turn the handwheel very slowly forwards until the pointer is at 0.3 (fig. Se). In this position the feed dog must make a visible and audible movement (switching). · Screw on the baseplate.
® 27 I I I
iJ
lio
=
3p
Fig. 5d
j
I I(
.......
q,_
·-
26 I
I I I ' '
lfl
Fig. 5e
Fig. 5f
17
6. Adjusting the presser bar height
Requirement:
With the presser bar lifter raised there must,pe sole of the zigzag foot
Check: · Raise the presser bar litter. · RI the zigzag sewing foot. · Lower the feed dog.
a
clearance of 8 mm between the needle plate and the
· Fully raise the presser bar lifter and hold it ir11 this positlon. e Insert sewing foot gauge No. 63-114690-39 from behind under the zigzag foot and into the cutouts of the needle plate (fig. 6). · Lower the presser bar litter to Its normal position again. The zigzag foot must rest parallel and without play on the sewing foot gauge. However. the sewing foot gauge must not lift the zigzag foot. and the needle thread tension release must be without play (fig. 6 a). Adjustment: · Loosen the three screws 183, 184 and 188. · Turn the zlgzag foot with the presser bar litter raised until it is parallel with the sides of the sewing foot gauge. · Use a screwdriver to press presser bar guide 185 firmly downward. · At the same time firmly tighten screw 184.
Check: · Press the presser bar litter further upward and release it again. The zigzag foot must rest parallel and without play on the sewing foot gauge. Needle thread tension release 181 must be without play. The presser bar litter must be in its raised
positlon.
Note: · The two screws 183 and 188 are not tightened until later when the top feed height is set
Fig. e
18
7. Adjustment of top feed foot in sewing direction
Requirement: The front edge
of the
top feed f oo t must be between the first and second tooth point of the center
tooth row of the feed dog (fig. 7).
C heck:
e Raise the presser bar litter. e Remove the complete sewing foot e Set the stitch length at "6". e Engage the top feed foot. e Turn the handwheel until the rising feed dog is flush with the needle plate surface. e Lower the presser bar litter.
·
Carry out a visual check (fig. 7).
Adjustment:
e Loosen screw 176 (fig. 7a). e Raise the presser bar litter until the top feed foot is just resting on top of the feed dog. e At the same time push the top feed dog to the front or to the rear until its front edge is between
the first and second tooth point of the center tooth row.
e Lower the presser bar litter. e Tighten screw 17'6. e Make sure that driving shalt 175 has no play.
Cross-check: · Check as described
under "Check".
Fig. 7
175
I I
176 I I
Fig. 7· 19
8. Adjustment of top feed foot in sewing direction Requirement: · In its highest working position the top feed foot must be 2 mm higher than the lower edge of the zigzag foot sole (fig. 8). Note: This adjustment must only be carried out when the height of the presser bar is set correctly! Check: · Raise the presser bar litter. · Insert the zigzag foot sole. · Engage the top feed. · Turn the handwheel until the needle bar is In Its lowest position. Caution: The handwheel must now no longer be turned! · Lower the feed dog.
· Fully raise the presser bar litter and hold it In this position. · At the same time insert sewing foot gauge No. 63-114690-35 from behind under the zigzag foot and Into the cutouts of the needle plate. · Lower the presser bar to its normal raised position. · Rai se top feed foot 189 by about 2 mm against its spring pressure and then relea. il · Press the top feed foot lightly downwards. · Check that the top feed foot rests only lightly on the sewing foot gauge and has no play. Adjuatment: · Loosen screws 183 and 188. · Push counter bearing 182 lightly downward until top feed foot 189 rests lightly on the sewing foot gauge. · Tighten screw 183 in this position. Crou-check: · Check for light resting and freedo m of play o f the top feed foot on the sewing loo t gauge <'" described under "Check". Adjusting the guide piece · Fully raise the presser bar litter and hold it in this position. · Remove the sewing foot gauge. · Lower the presser bar litter down to Its raised position. · Turn the handwheel until needle bar 190 is in its top position. · Set guide piece 187 at a clearance of 0.2 mm from cross head 185 (fig. Sa). · Tighten screw 188.
Check: · Turn the handwheel and check for clearance of 0.2 mm.
20
182---
183---
189-_________ ;
Fig. Sa
Fig. 8
21
Zigzag mechanism
9. Adjustment of needle in needle hole
Requirement: At the straight stitch setting, the needle must be in the cenler of the needle hole (fig. 9). The widest zigzag stitches must be the same distance from the left and right needle hole edges (fig. 9a). Check: e Remove the sewing foot. e Insert a new needle. · Select stitch pattern ·oo· for straight stitch. e Turn the handwheel until the needle is in the needle hole. e Make a visual check. · Select adjusting program "248" and a zigzag width of 9 mm. · Turn the handwheel and check the left amd right distance. Adjustment: · Select stitch pattern ·oo· for straight stitch. e Loosen screws 39 just a little (fig. 9b). e Push the complete stepping motor 38 to !the left or to the right until the needle is centered (fig. 9). · Tighten the two screws 3. Crou-c:heck: · Carry out as described under "Check".
22
I
,..----i r-1--m
-
- ,, ----
fig. 9
Fig. 9a
er
' ' t ' ' ' ' ' ' ' ' '
I
1
t
38 Fig. 9b
39
39
23
Stitch forming parts
Foreword:
The sewing hook adjustment consists basically of the three following adjustments: Needle rise Needle bar height Hook-to-needle clearance
Needle rise:
The needle rise is th e movement by which the needle must rise from Its lowest position until a thread loop has formed on the side of the needle on which the
scarf
is located.
Needle bar heig ht :
The needle bar heigth must be set in such a way that the sewing hook point can easily enter the thread loop above the needle eye at straight stitch and zigzag stitch settings. The distance or the sewing hook point from the needle must be as small as possible. so that the sewing hook point does no miss the thread loop. s-ing
Hook-to-needle clearance:
The sequence of
h.ook adjustments Is
as follows:
1. Hook-to-needle clearance
2. Bevelgear seWng
3. Needle
rise
4. Needle bar height
24
10. Position of needle in needle hole In sewing direction
Requirement: There must be a clearance of 02 mm between the back edge of the needle shank and the back edge of the needle hole in the needle plate (fig. 1 0). Note: Since system 130nos H needles increase in size at the needle front side only, the point of an Nm 1 00 needle is positioned exactly in the middle of the needle hole (as seen in feeding direction), while the point of an Nm 80 needle is positioned slightly closer to the back edge of the hole.
· Engage the zigzag foot. · Lower the zlgzag ·toot.
· Insert a new needle of sysem 130/705 H In size Nm 1 00. · Select st ch pattern ·oo· for straight stitch. t i
Check:
· Turn the handWheel until the needle Is In its lowest position. The needle must now have the same distance to the front and rear edges of the needle hole In
the foot and the needle plate.
'
I ·
·
I ·
.
I
Flg. 10
25
Adjustment in relation to the sewing foot : e Loosen screw 41 (ftg. 1Ob).
a Move pin 43 together with collar and needle bar frame 42 to the front or the rear until Is exactly in the middle of the needle hole in the sewing foot (fig. 1 Ob). · Tighten screw41.
Check: e Turn the handwheel and raise the needle.
the needle
e Place a piece of paper underneath the sewing foot and lower the foot. · Turn the handwheel and bring the needle to its lowest position. e Its distance from the front and rear edges of the needle hole in the foot must be equal. e Disconnect spring 35 at the top with a spring hook and let it hartg on the latter (fig 1Oa). . . e Disconnect connecting rod 34 at pin 36 by lifting it up. e Move the needle bar frame and the connecting rod to the left and right Important: The needle bar frame must move easily and without binding. If this Is not the case any binding must be removed. e Re-insert pin 36 of connecting rod 34. · Mount sprirtg 35 on connecting rod 34.
AdJintlng the needle p&ete:
e Turn the handwheel and bring the needle to Its top position. · Remove the zlgzag foot e Turn the handwheel and bring the needle to Its lowest position. e Turn adjustment eccentric 44 until the distance from the front and rear hole is equal (fig. 10c). Crou-dleck: e Carry out a visual check at straight stitch and zlgzag stitch se:
'
l thE' needle
I I I 36
I
Fig. lOa
26
Fig. 10b
I
§----44
Flg.10c:
L I
__
-
::1 1
r_NM 100 ,._r [t.----c:=:l
l
t
,
27
11. Adjustment of hook-to-needle clearance
Requirement:
At the straight stitch settmg the distance of the sewing hook point from the bottom of the scarf in the touch the needle.
needle must be 0.05 mm (see fig. 11 ). In the widest zigzag stitch, the sewing hook point must almost
Check:
·
e
Remove baseplate and thread monitor, but leave all electrical connections in place. Remove the needle.
· Remove sewing foot and needle plate. · Remove the bobbin case.
· · · · · · · · · ·
Unscrew the bobbin case position fi nger. Insert a new needle of system 130/705 H in size Nm 80.
· Remove the sewing hook gib with bobbin case base by unscrewing the three screws.
Select stitch pattern "00" for straight stitch.
· Turn the handwheel until the hook point is opposite the oenter line of the needle.
Check the distance between hook point and needle scarf. Check the axial play
of hook 50
to hook shalt bush 48.
Adjuatment:
If the hook sha1t has axial play, loosen the two screws 49 (fig. 11a). Press bevel gear 46 with the shaft to the front and push sewing hook 50 to the rear. Tighten the two screws 49. Loosen screw 45 In the lifting eccentric by 2 to 3 turns. Loosen screw 47 just a little.
e Turn handwheel and sewing hook until the hook point is opposite the middle of the needle scarf. · hilt the sewing hook complete with hook shalt bush 48 until the distance of the sewing hook
point to the bottom of the scarf in the needle is 0.05 mm.
·
Tighten screw 47 on the narrow flat of the hook bush.
Note: The large flat of the hook shalt bush must face right
Cross-check: e Check for free
movement of hook shalt.
e Check again the distance between the sewing hook point and the bottom of the needle scarf.
11e.
Adjus1ment of bevel geel'll
Requirement:
The bevel gears must move freely and without play.
Adjustment:
e Push the bevel gear with the lifting eccentric to the left until it is in contact with bevel gear 46
and has no play.
·
Tighten screw 45 on the surface of the drive shalt.
Check: · As described under "Requirement".
28
/
I I
I I
OOSmm I
CID
0
Fig. 11
50---
45
I I I I
G)
6- - - - - - Fig. 11e
29
12. Hook timing Requirement:
When the needle bar has moved 2..3 mm upwards from its lowest position (with the machine set for straigth stitch and center needle position), the sewing hook point must be exactly opposite the center line of the needle (fig. 12a).
Check: · Unscrew baseplate and thread monitor, but leave all electrical connections in place.
e Remove sewing foot and needle plate. e Select stitch pattern "00" for straight stitch. · Bring the needle bar to its lowest position by turning the handwheel. e Set the spacer (63-102 600-18) on top of the needle bar and push it upwards against the needle bar frame.
· Push the needle-rise clamp (00-870 137-01) on the needle bar and tighten it lightly. e Push the 2.3 mm feeler gauge (00-870 136-01) with its cutout on the needle bar above the
needle-rise clamp. e Loosen the needle-rise clamp and push the 2.3 mm feeler gauge upwards a mst the spacer. e Tighten the milled screw on the needle-rise clamp.
· Turn the handwheel backwards and forwards a little.
e If there is any play on the feeler gauge, repeat this procedure.
· Remove the 2.3 mm feeler gauge.
e Turn the handwheel in sewing direction until the needle rise clam! (fig. 12a). By this means the needle has moved upwards to the needle risr "' The hook point must now be exactly behind the center line of the ne. .
.otn the spacer
'11.
Ad justment:
e If the setting is not correct, remove the needle-rise clamp. · Loosen the two screws 49 (fig. 12b). · Re-fit the needle-rise clamp and repeat the operation as desc: ,.,n._ . . bar has moved 2.3 mm upwards and the needle-rise clamp is u ...nwct with the : · Turn the hook until the hook point is exactly behind the center 1 1e of thP · ·. "1 L e Press sewing hook 50 and bevel gear 46 together so that there ·s no r and tighten one screw 49. Check: e Turn the handwheel a little backwards and then forwards until the , , contact with the spacer (fig. 12a. The hook point must be exactly behind the center line of the needle. e Remove the needle-rise clamp. e Verify that the hook shaft has no axial play. e Tighten the two screws 49 very firmly. jle -·
. oeo::
30
Ag. 12
Fig. 12 e
I I 46
Ag.12b
31
13. Adjustment of needle bar height
This machine has a transverse double-rotating hook. On the right zigzag penetration, the sewing hook reaches the needle a little earlier and at the left penetration a little later than at the oenter penetration (fig. 13). Requirement: The distance between the top edge of the needle eye and the lower edge of the sewing hook po1nt musl be 0.5 mm at the w idest left zigzag penetration (fig. 13a).
Check:
e Select adjusting program "248" and a zigzag width of 9 mm. e Turn the handwheel until the needle rises at the left zigzag stitch and the sewing hook point Is
exactly behind the needle center line of the needle. The distance between the top edge of the needle eye and the bottom edge of the hook point must be 0.5 mm.
Adjustment: · Loosen screw 192 just a little (fig. 13b). · Shift needle bar 190 in height, without twisting it, until the clearance of 0.5 mm is set.
· T ighten screw 192 securely.
Cross-check:
· Check the clearance of 0.5 mm. The needle holder must face exactly square to the right
Fig. 13
Flg. 13b
Flg. 13a
r
32
14. Adjustment of bobbin case posi ion finger t Requirement: The clearance between the position finger and the bottom of the groove in the bobbin case base must be 0.7 mm.
Check: e lt must be possible to insert the clearance gauge 00-880133-01 w ease but without play between ith the position finger and the l>ottom of the groove in the bobbin case base (f·ig. 14). Adjustment:
· · · ·
Cross-check:
Loosen the two screws 54. Insert the clearance gauge. Press position finger bracket 53 against the clearance gauge at an angle of 90 degrees. Tighten the two screws 54.
· Same as "Check".
53---
0,7mm
54 < ...
...
Fig. 14
33
Stitching off
15. Adjustment of needle threader
With the threader key pushed fully down, prong 194a must pass through in the cenler between the top and bottom edge of the needle eye of a needle of size Nm 70 (fig. 15).
Requirement:
Check:
· Insert a new needle, system 130/705 H , size Nm 70.
· Set the machine at top needle position by briefly pressing the foot control. · Push threader 191 fully down and swing it to the front. · Carry out a visual check.
Height adjustment:
· Disconnect pull-spring 195 at the top (fig. 15b). · Press threader bar mounting 193 down and hold it in this position. e Loosen Philips screw 194 b only 114 of a turn. y · Push threader upward or downward until prong 194a Is the same distance form the top and bottom edge of the needle (fig. 15). · T tghten screw 194 in this position.
·
Cross-check 1:
· Use key 191 to move the threader prong to the rear and to the front again. Carry out a visual
check of the prong height. Leterel adjustment: e Use key 191 to tum the threader prong to the front into the needle eye.
e Loosen screw 192 by just 1/8 of a turn (fig. 15a). e Move the prong bracket 193a laterally until prong 194a Is precisely centred in the needle eye. · Tighten the screw.
Cross-check 2:
· Use the key to move the threader prong backwards and to the front again. Carry out a visual check
of the lateral position of the prong.
· Tum pull-spring 195 by two ·full turns counter-clockwise and engage it in hook 196 so that the
spring is positioned towards the left. (fig 15b). This ensures that the threader is swung automatically backwards. e Actuate the threader key, and perform a visual and a functional check.
l
Nm1 70 1 I I I I I I I I I
__
I
· --- -
·--1M
I I I 112
I
Flg.15
Flg.15a
34
--195
-194
-------1111 -------1110
Flg.156
16. Adjustment of bobbin winder st.op
Requirement: The bobbin winder must stop when the thread has reached a level of 1 mm below the bobbin rim.
Check: · Wind a bobbin and check that the w inder stops as desired. · Loosen screw 55 (fig. 16). · Position stop 56 to the left for less thread and to r ight for more thread. · Tighten screw 55. Cross-check: · Wind a bobbin and check that the winder stops as reQuired.
Adjustment:
,I
®
--.
ID"';:r, -f l
f-
-se
55
;:
./
Fig. 18
35
17. Adjustment ot bobbin thread tension Requirement: The force reQuired for pulling cotton thread 502 or synthetic fibre thread 10013 off the bobbin must be approximately 20 to 25 g. Check: e When a threaded bobbin case hangs on its thread, it must not slide downwards by its own weight e Upon sharp upward movements of the hand, the thread must run off gradually (fig. 17). e There must not be any thread waste under the tension spring. e The tension spring must rest evenly and parallel on the bobbin case.
Adjustment:
Loosen the knurled screw a little and turn it in again until a resistance is felt when the thread is pulled off. Check: · Carry out as described under "Check" Note: e Once the bobbin thread tension has been set correctly, tension adjustments must be made only at the needle thread tension.
Fig. 17 18. Adjustment of needle thread tension
Requirement:
Within the adjusting range from 3 to 5, the interlacing of the needle thread and the bottom thread (cot ton thread 50/2 or synthetic fibre thread 100/3) must take place approximately in the middle of th,e fabric in straight and Zlgzag stitch setting (fig. 18 and fig. 18c). Check: e Set the needle thread tension at "5". e Set stitch pattern "1 o· for zigzag and the stitch width at "6,0". e Set the stitch length at "2.0". e Place a piece of fabric under the zigzag foot and sew. e Select stitch pattern ·oo· for straight stich and set the stitch length at "2.5". t e Sew with straight stitch. 36
Adjustment:
· First turn mtlled nut 57 fully t the left (fig. 18d). o
· Sel zigzag stitch " 1 o·. stitch width ·s.o·, and stitch length "2.0". · Sew wtth ztgzag strtch.
· At the same lime turn the milled
the center of the fabric (fig. 18).
nut gradually in clockwise direction, until the knot is formed in
Crou-c:heck: · Sew with straight stitch and zigzag sitch as described under "Check". t
Flg. 18
Fig. 18a
Fig. 18b
Fig. 18c
Fig. led
37
19.
Adjustment of thread ,check spring stroke
The thread check spring prevents the descending needle from piercing the slack needle thread. The needle thread is slackened by the descending take-up lever. Requirement: . Thread check spring 60 must keep the needle thread taut at least until the needle point enters the fabric (fig.
19). The thread check spring
must release the needle thread as soon as the lower edge of
the needle eye enters the fabric.
Check: · Select stich pattern ·oo,· for straight stitch. t e Set the stitch length at "6.0". · Place two plies of linen fabric under the sewing fool e Sew a few stitches. · Turn the handwheel and determine the end of the thread check spring stroke. Correct slackening
of the needle thread takes place when it enters the needle eye not tautly but in a loose curve. Ad justment:
e Loosen screw 58. · Turn thread check spring stop sleeve · Tighten screw 58. Cross-check:
59 until thread check spring 60 is In the correct posit ion.
· Sew a few stitches and check as described under "Check".
38
58 - - - - se- - - - "
1 I eo- - - - - - - '
/
A;.1e
39
20. Adjustment of equal forward and reverse stitch length (for all forward and reverse controlled stitch patterns)
Requirement:
Letters B, D. G, H sewn in succession must measure 34.5 +1- 1.5 mm and must not be distorted (fig. 20c). To this end the machine must be at operating temperature, switch-on time 10 t 15 minutes o
The daming program must be sewn as an exact rectangular (fig. 20) and not as a rhombus
(fig. 20a and 20b). Check:
e Switch off the machine.
· Press key "menu" and the master switch simultaneously (machine switche on). d · The display shows adjusting program "248". · Now press the "esc"-key.
· Now the display shows the adjusting programs.
· Select the darning program (key 3).
· Sew the darning program (fig. 20).
· Place a piece of fabric underneath fancy stitch foot "2A". Preliminary adjustment: · If a rhombus was sewn according to fig. 20a, turn the adjusting eccentric just 2 to 4 degrees in direction ·A·. If a rhombus was sewn according to fig. 20b, turn the adjusting eccentric just 2 to 4 degrees in direction ·e·.
Cross-check: · Sew the darning program and check. · Select adjusting program "8, D. G, H" and sew (fig. 20c). · Check for length of 34.5 +1- 0.5 mm.
Precise ad justment:
e If the letters are distorted and longer than 35 mm, turn the adjusting eccentric with a screwdriver only one degree In direction ·e· according to fig. 201. If the letters are distorted and shorter than 34 mm, turn the adjusting eccentric with a screwdriver only one degree In direction "A" according to fig. 20f. Check:
· Select the eyelet buttonhole. · Place a piece of fabric underneath bottonhole foot "Sa".
· Sew the eyelet buttonhole. The wedge tack of the eyelet buttonhole must be sewn evenly (fig. 20d).
Note: If very different sewing threads or difficult fabrics are used, buttonholes, utility stitches or fancy stitches may be· sewn with shifts in the pattern design. T correct this, the customer can adjust the balance. Always correct only the reverse stitch length. o
40
ftr.
::11
Fig.
II
Fig. 20a Fig. 20b
!lJIr: Y:f/ : Y. :f f
34,5 ±0,5 Fig. 20c Fig. 20d
20
41
21. Making up a sewing sam ple When all sewing checks are completed and the machine sews perfectly, a sewing sample is to be made. This sewing sample should contain the most important stitch patterns which can be sewn on a repaired machine (fig. 21 ). If the customer has special requirements, these should appear on a separate sewing sample.
The following is a sewing sample made on the PFAFF
Stitch pattern
No.
Stitch width
S1itch length or pattern length
2.5 2.0 1.5 2.0 22 0.35 0.35
Sewing loot no.
1 Straigth stitch 2 Zigzag stitch 3 Darning stitch 4 Honeycomb stitch 5 Ungerie buttonhole 6 Eyelet buttonhole 7 Fancy stitch
00 10 09
6.0 6.0
24
40 46 71
6.0
4.5 6.0 9.0
Zigzag foot "OA" Z igzag loot "OA" Fancy stitch foot "2A· Zigzag loot "OA· Buttonhole foot 5 A Buttonhole loot "5A· Fancy stitch loot "2A"
" "
1 2 3
5 6
IHuf"' n'
r::::::!l
c
· n n ,lll '"
::::::::::>
"' m n 'u ,, , , ,,l, ''" nn un ''' "' uu "
7
\ r l r r l , l r l l r l r' r
Fig 21
.
42
Repair Instructions
22. Dismantling and assembling the needle thread tension
Removal: Remove the needle thread tension. e Remove circlip 86 (fig. 22). e Remove spring washer 87 and tension dial 88. e Unscrew adjusting screw 92 from guide 93. e Remove guide 93. 5 Pull off the adjusting screw and pressure spring 91. · Pull out or knock out cemented stud 97 complete with pressure piece and the three tension discs 94, 95 and 96.
·
Fitting: e Insert tension stud 97 with the three tension discs and the pressure piece. e Cement tension stud 97 into the mounting plate with Omnivit-Rapid. e Push pressure spring 91 and adjusting screw 92 onto tension stud 97. e Insert guide 93 with its right side and fully screw in screw 9 at the left. 2 · Push on tension dial 88 and make sure the guide pin engages with the worm. e Insert spring washer 87. e Push on clrclip 86. e Install the needle thread tension. e Set the needle thread tension according to section 18.
7
99. 9 ,
... ·'
87 86
I .. . . ... 8:·.· ·..
. · ·. .
. · . - . .
,
.
. .. , -I I
1QO
·.
I
.. · 101
.
.. .. . . 10S .
104 1o3·
1
I
102
·- -
,.....
j
i
Fig. 22
43
23. Changing the
6
pressure spring in the handwheel release
Removing the handwheel release Remove plastic cap 119 with clearance gauge 00-880 t 33-01 (fig 23) 6 Unscrew metal screw 107. e Pull out handwheel-release disc 1 1 0 and pawl 1 1 1 and remove clutch piece 1 1 3 and pressure spring 114. F itting the handwheel release e Turn handwheel 1 1 5 and clutch disc 1 1 6 until the square hole and cutout 1 1 7 are facing down. · Place pressure spring 1 1 4 onto the handwheel boss so that its rear side fits into the guide groove (fig. 23b). e F irst place clutch piece 1 1 3 over the boss of the handwheel, then press it towards the back. The pressure spring is thus placed vert ical and clutch piece is positioned as shown In fig. 23c. e Push the pin of pawl 1 1 1 (fig. 23d) Into the hole in such a way that it Is positioned as shown in
· Push handwheel-release disc 1 1 0 with its square mark 1 1 8 fac up into the handwheel (ftg. 23e). ing
e Handwheel-release disc 1 1 0 must be turned about 5 mm back and forth in order to snap in properly. · F'rt metal screw 107 with washer 108. e Hold handwheel 1 1 5 firmly and turn handwheel-release disc 1 1 0 In sewing direction until you hear
ftg. 23d.
it snap in place.
· F'rtthe plastic cap. e Check the handwheel release by ergaging and disengaging l i
44
,, s
116
115 114 113 111
110
Flg. 23a
Fig. 23 11 7
--111
Fig. 23b
Flg. 23d
Flg.23e
Flg. 23e
.
113
'
45
24. Dismantling and assembling the sewing hook
Removal: · Remove the needle. · Unscrew the sewing foot. · Remove the bobbin case. · Unscrew the bobbin case position finger. e Take out the three screws with springs from behind (fig. 24). · Remove the bobbin case base with sewing hook gib (fig. 24a). · Turn the sewing hook gib to the left or to the right out of the bobbin case base (fig. 24b). · Clean the sewing hook, bobbin case base and hook gib.
· Turn the handwheel until the opening of the sewing hook laces to the left (fig. 24c). · Turn the sewing hook gib to the left into the bobbin case base (fig. 24d). · Insert the bobbin case base complete with sewing hook gib into the sewing hook (24e).
e Fasten the sewing hook gib from behind with three screws with springs (fig. 24).
Fitting :
· Screw on and adjust the bobbin case position linger.
25. Cleaning and oiling the machine Note:
The machine is equipped with sintered bearings and parts a nd is therefore maintenance-free for the user. Only the sewing hook should be lubricated once in a while with normal sewing machine oil. Alter repair work, the mechanic should oil the machine with BP Energol HLP 46 or HLP 80 and the sewing hook with normal sewing machine oil. Sintered bearings or parts must not be cleaned with gasoline, petroleum, kerosene, thinners, trichlorethylene etc. . Dirty or clogged sinter bearings or parts may only be cleaned mechanically by brushing them off. They are then oiled with BP Energol HLP 46 or HLP 80.
46
Ag.24a
Rg. 24b
flo. 24«:
Fig. 24d
Rg.24a
47
26. Changing the toothed bell
from the circuit board (fig. 26). · Press both catches 117 of motor plug 1 1 6 together and remove the motor plug upward. · Place the complete baseplate aside. e Open both cable clips 1 1 9 at catch 120 and remove the cables from clips 1 19. · Loosen fixing collar screw 33 of the synchronizer (fig. 26b). · Remove the synchronizer to the right from the shaft. · Remove the free-arm cover. · Remove the complete buttonhole sensor. · Loosen screw 130 in arm shaft crank 131 (fig. 26a). · Loosen screw 1 of tensloning roll 137. · Unscrew screw 134. · Remove circlip 132 from the arm shaft. · Pull arm shaft 133 to the right and release toothed belts 136 and 135. · Remove toothed belt 136.
· Turn the machine upside down. · Unscrew the four screws of the baseplate. · Turn the baseplate upside down. · Remove the eight flat wires with their plugs 122
Removal: C Remove needle, sewing foot and needle plate. C Remove the top cover. the housing insert and tine face cover.
117--
- -117 118 '
/
0 I --+---' 122
Fig. 26
48
131
132 I I
134 138 --
Ag. 26a
Fig. 26b 49
Fi ting: t Insert new toothed bell 136 and pull it upward (fig 26c). · Push arm shah 133 t the leh through toothed bell 136 into the leh bearing and into arm shall o crank 131. · RI circlip 132 on the arm shall. · Remove lengthw play In the arm shah and tighten screw 130 in the arm shall crank. ise · Push toothed bell 136 onto upper sprocket 138. · Insert and tighten screw 134 in upper sprocket 138. · Set the tens ioning roller according to section 1. · Place motor belt 135 on the handwheel. · Push synchronizer 34 onto the shall (if 26d). Make sure that the housing rib is between g. guide clamps. · Place five-wire cable 127 in cable clip 1 19. · Place seven-wire cable 200 in the cable guide (fig. 26d). · Place the complete baseplate against the machine. Now the flat cables are connected to the baseplate as follows (fig. 26e). · Insert motor plug 1 1 6 in motor socket 1 1 8 (both catclhes 117 must engage). · The two-connection plug 123 to the two-pin base. · The plug of ftve-wire cable 127 to the black pin base. · The plug of seven-wire ca.ble 200 to the pink pin base. · The plug of seven-wire cable 128 to the blue pin base. · The plug of seven-wire cable 125to the black pin base. · The plug of twelve-wire cable 121 to the black pin base. · Insert the mains lead in the machine socket and connect it with the mains.
·
131 132 130
I I I
'
134
138 --
137 ---
Fig. 2ec
50
34
117--
--117 / 118 _.
I I 121
Fi .26e g
51
Adjusting the arm shaft crank
· Set stitch pattern ·oo·
Its shaft (fig. 26h). e Rase 1he needle bar and i
· Turn the handwheel
e
Loosen screw 130 In arm shalt crank 131 just enough to allow the arm shaft crank to be turned on Insert the needle.
for straight stich. t
· Hold arm shaft crank 1 3 1
with your left hand. with your right hand until the feed dog is at the bottom and the sewing hook
point Is cantered between the feed dog rows. · Now hold the handwheel while at the same time turning arm shaft crank 131 until the needle bar Is In
Its lowest position. its cutout on the needle bar above the
· Fit spacer 63-102600-18 on the needle bar. · Push needle-rise clamp 00-870137-01 on the needle bar and tighten it just a little (fig. 261). · Push the 2.3-mm feeler gauge 00-870136-01 with needle-rise clamp. · Push · · · · Tighten the milled
the needle-rise clamp and the 2.3-mm feeler gauge up against the spaoer. screw of the needle-rise clamp. If there s play at the feeler gauge, repeat this procedure. I Remove the 2.3-mm feeler gauge. Hold the handwheel and turn arm shaft crank 131 in sewing direction until the needle-rise clamp Is In contact with the spaoer. If this
Is not the case, turn simultaneously handwheel and arm shaft crank 131, until the sewing
· The sewing hook point must now be exactly opposite th oenter line of the needle (fig. 26g). e · hook Is exactly opposite the center line of the needle · Remove the needle-rise clamp. · Tightern screw rise Is correct. o · T this end re-attach the needle-rise clamp and check.
with the
clamp resting against the spacer.
130 In
arm shaft crank 131 In such a way that the latter has no play and the needle
two screws. e Place the fiVe-wire and the four-wire cable in
· Place cable according to fig. 26i and · Connect the plug of ve-wire if
· Fasten the free-arm cover with
e e
Set synchronler according to section 5. Insert the complete buttonhole sensor.
the cable guides (ig. 26i). f
· Set the baseplate complete against the machine.
fit the two cable clips. flat cable 126 to the blue pin base.
· Connect the plug of four-wire Hat cable 123 to the black pin base. · Fold the baseplate against the machine and fasten it with the four screws. · Then the following adjustments must be checked and carried out: · Adjustment of bobbin thread tension, section 1 7 · Adjustment · Adjustment · Adjustment of needle thread tension, section 1 8 of thread check spring. section 1 g
· Use testing appliance ABB Metrawatt M 5013 to carry out an electrical safety test according to VDE 0701.
of equal forward and reverse stitch length, section 20
5 2
130,
' ' ' ' '
131
Ag.26h
Fig. 261
Fig. 26g
Fig. 26i
Fig. 261
I 126
I 124
53
27. Changing the bevel gears
Note: Always change bevel gears in pairs Removal:
· Remove the needle, the sewing foot and the needle plate.
· Remove the top cover, the housing insert and the face cover. · Turn the machine upside down.
· e · · · · · · e · e e · · ·
Unscrew the four screws of the baseplate. Turn the baseplate upside down. Disconnect plugs 122 of the eight: flat wires from the circuit board (fig. 27). Press both catches 1 1 7 of motor plug 1 1 6 together and pull the plug oft upwards. Place the complete baseplate aside. Open both cable clips 1 1 9 at catch 120 and remove the flat cables from the clips. Loosen fixing collar screw 33 of the synchronizer (fig. 27a). Remove the synchronizer t the right from the shaft o Remove the free-arm cover. Remove the complete buttonhole sensor. Disconnect pull-spring 14. Unscrew screw 18. Turn the handwheel until feeding eccentric 20 faces the rear of the machine. Fold cam lever 9 downward and remove it with link 1 0 to the left from Remove slide block 12 with the spring to the righl
t"P
slide block pin.
118--117-----117
Fig. V
54
·
·
Disconnect pull-spring loosen screw 64
63 (fig
27b).
· C
Remove transverse-drive stepping motor according to Remove feed-dog lowenng mechanism
Unscrew the two screws 54 ol bobbtn case position finger. · Place bobbin case position finger 53 and the leaf spring aside. · Loosen the two screws 49 at the sewing hook. · Remove the complete sewing hook towards the top. · Unscrew dog-point screw 19a of feeding eccentric 20 (fig. 27a).
·
65.
section 38.
· ·
Push feeding eccentric to the right as far as it will go. Push the plastic washer a little t the left. o
· Remove the circlip with a screwdriver. · Loosen screw 45 of the lifting eccentric by approx. 3 turns (fig. 27b).
g. · loosen the 3 screws 35 of the lower toothed belt sprocket (fi 27a). Push the hook driving shaft fully to the right.
·
· Remove lf ing eccentric 62 from the hook drMng shaft (fig. 27b). it · Remove the needle plate to the top.
· Loosen · Pull
screw Sa (fig. 27c). out pin Se to the right.
· loosen the two screws 3 and 7 of the cylindrical pins.
·
Remove the cylindrical pins and the plastic washers.
· Remove the connecting bar. · Remove screw 61 at the sewing hook bearing and push the latter fully to the left.
e
Remove complete feed-dog drMng shaft
5.
·
0 ight. Remove complete sewing hook bearing 6 to the r
Fitting: e Insert the new bevel gear complete with sewing hook bearing 60 in the machine (fig. 27c) e Insert feed driving shaft 5. · Insert the two cylindrical pins 4 and 6 with the plastic washers. · Fit bobbin case position finger 53 and the leaf spring. · Fit"the needle plate. · Adjust the feed driving shaft according to section 2. e Turn in screw 61 and fasten the hook bearing. · Insert the connecting bar In the feed driving shaft. · Fit pin Se with the washer situated t the left of pull rod Sb without any play. o · Tighten screw Sa. · Pull the feed dog to the front. Important: The complete feed driving shaft with top feed must slide slowly to the 1rear. e Push lifting eccentric 62 with its hole t the right onto the hook driving shaft. o · Push the hook driving shaft to the left. · Tighten screw 45 in the bevel gear on the flat of the hook driving sli1aft. · Attach the circlip making sure that the plastic washer Is located between bearing and circlip. · Pull the hook driving shaft fully to the r ight and set the shaft without any play, using one of screws 35 of the toothed-bell sprocket (fig. 27d). e Screw dog-point screw 19a in feed eccentric 20 and In the hook driving shaft. Note: ic Dog-point screw 19a must always protrude from feed eccentr 20 on the opposite side of screw 45 In lifting eccentric 62. e Fit the feed dog lowering mechanism. e Fit slide block 12 with the spring on the pin and insert into the slide way in the correct curve radius. Check that the slide block can be moved easily without play or binding in the slide way. · Push link 10 complete with cam lever 9 to the right onto the connecting bar pin. · Turn cam lever 9 to the rear and then over feed eccentric 20 from the top. · Insert screw 18 Into stud 1 9 and tighten a little. · Shift stud 19 laterally until link 1 0 and the connecting bar have only a slight play and are freely movable. e Ti ghten screw 18. · Frt the two springs 14 and 63 (fig. 27c and 27d). · Install transverse-drive stepping motor according to section 38. · Push synchronlzer 34 onto the shaft. When doing so, mak sure that the housing rib Is between both guide clamps. · Place five-wire flat cable 127 in cable guide 119 (fig. 27d). · Place seven-wire flat cable 200 In the cable guide. · Insert complete buttonhole sensor. · Fasten the free-arm cover wih two screws. t · Place the five-wire and the four-wire flat cables in the cable guides. · Set the baseplate complete against the machine.
56
50 49 I l
I I
63
I :
64
Sb Se:
61--
' ' ' ' '
I I
62
I
5
I ' '
Fig. 27c
6
I I I
7
I I I
200
Fig. 27d
57
· Now the flat cables are connected to the circuit IJoard as follows:
· Motor plug 1 1 6 to motor socket 1 1 8 (both catches 1 1 7 must engage). · Two-connection plug 124 to the two-pin base. · The plug of five-wire flat cable 127 to the black pin base. · The plug of seven-wire flat cable 200 to the pink pin base. · The plug of seven-wire flat cable 128 to the blue pin base. · The plug of seven-wire flat cable 125 to the black pin base. · The plug of twelve-wire flat cable 121 to the black pin base. · The plug of five-wire flat cable 126 to the blue pin base. e · The plug of four-wire flat cable 123 to th black pin base. · Fold the baseplate against the machine and fasten it with the four screws. · Connect the mains lead to the machine socket and the mains. Now the following adjustments must be carried out: Timing of feed motion · Section 3: · Section 4: Adjustment of feed dog in sideways direction Adjustment of feed dog height · Section 4a: · Section 5: Adjustment of synchronizer · Section 1 1 : Adjustment of hook-to-needle clearance · Section 12: Hook timing · Section 13: Adjustment of needle bar height · Section 14: Ad justment of bobbin case position finger · Section 17: Adjustment of bobbin thread tension · Section 18: Adjustment of needle thread tension · Section 20: Adjustment of equal forward and reverse stitch length · Section 21: Making up a sewing sample e Use testing appliance ABB Metrawatt M 5013 to carry out an electrical safety test according to VDE 0701.
58
Sb Se
·
,
·
:
I I
61--
62 45
I
1
I
I
5
I · I
Fig. 27c
6
· · I
7
I I I
200
Fig. 27d
59
28. Changing the bottom circuit board Note:
The bottom circuit board is only exchanged as a complete unit. Removal:
· e e e ·
Remove the mains lead from the mains socket and from the machine. Turn the machine upside down. Unscrew the four screws of the baseplate. Turn the baseplate around. Disconnect plugs 122 of the eight flat cables from the circuit board (fig. 28). · Press the two catches 1 1 7 of motor plug 1 1 6 together and pull it oH upwards. · Place the complete baseplate aside.
Fitting:
· Set the new baseplate complete against the machine. · Insert motor plug 116 in motor socket 1 1 8 (both catches 1 1 7 must engage). Now the flat cables are connected to the new circuit board as follows: · Two-connection plug 124 to the two-pin base. · The plug of frve-wire flat cable 127 to the black pin base. · The plug of seven-wire flat cable 200 to the pink pin base. · The plug of seven-wire flat cable 128 to the blue pin base. · The plug of seven-wire flat cable 125 to the black pin base. · The plug of twelve-wire flat cable 121 to the black pin base. · The plug of five-wire flat cable 126 to the blue pin base. · The plug of four-wire flat cable 123 to the black pin base. · F old the baseplate against the machine and fasten it with the four screws. · Use testing appliance ABB Metrawatt M 5013 to carry out an electrical safety test according to VDE 0701.
60
I
34 61
29. Changing the thread monitor with the free-arm cover Note: The thread monitor is only exchanged complete with the free-arm cover. Removal: · Remove mains lead from mains socket and machine. · Tum the machine upside down. e Unscrew the four screws of the baseplate. · Tum the baseplate around. · Remove th plug of four-wire flat cable 123 from the circuit board (fig. 29a). e · Open the two cable clips 1 1 9 at catch 120 and remove the four-wire cable from the cable guides 119. e Unscrew both screws 153 of the free-arm cover (fig. 29b). · Remove the free-arm cover. Fitting: · Secure the new free-arm cover 154 with both screws 153. e Place four-wire flat cable 123 in the cable guides. · Install all cables according to fig. 29 and fit the cable clips 120. · Insert plug of four-wire flat cable 123 in the black pn base (fig. 29a). i · Fold the baseplate against the machine and secure it with the four screws. Check: · Insert the mains plug. e Check thread monitor function with the bobbin full and empty. · Use testing appliance ABB Metrawatt M 5013 to perform an electri