Contents Page:
Preface and General Safety Notes
Part 3: Service Instructions Cl. 558
1. General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Handwheel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3. Turn-off Lever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4. Brake Lever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4.1 Auxiliary Brake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5. Coupling Lever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
6. High-speed Wheel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
7. Turn-on Link with Idle lever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
8. Setting Lever for Stitches in the Eye . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
9. Brake Strap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
10. Brake Clamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
11. Cloth Clamp height . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
12. Cloth Camp Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
13. Pressure point of the Clamp operating lever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
14. Pressure of the Clamp Closing Lever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
15. Position of the Clamp Closing Lever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
16. Machine End Positions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
17. Changeover Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
18. Squaring of the Hook Block to the Material Support Plate . . . . . . . . . . . . . . . . . . . . . 24
19. Material Support Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
20. Upper Toothed Quadrant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
21. Clamping Plates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
21.1 Setting Parallel to the Material Support Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
21.2 Setting the Stopper Pieces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
21.3 Setting the Securing Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
22. Neutral Needle Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
23. Cutting Room between the Two Seam Rows . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
24. Symmetrical Eye Form and Uniform Length of the Buttonhole Seam . . . . . . . . . . . . . . . 31
25. Anvil Body and Cutter Bar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
26. Torque Limiter and Ratchet Wheel on the High-speed Wheel . . . . . . . . . . . . . . . . . . . 35
27. Needle Bar Drive Wheels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
28. Hook . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
28.1 Hook Height . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
28.2 Looping Stroke . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
28.3 Needle Bar Height . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
28.4 Hook Clearance and Needle Guard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Home
29. Spreader . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
30. Needle Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
31. Tension Release . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
32. Upper Thread Puller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
33. Removing of the Machine Arm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
34. Replacing of the Machine Arm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
35. Needle Bar Rotation Center . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
36. Upper Thread Trimmer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
36.1 Control Lever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
36.2 Upper Thread Knife . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
36.3 Feed Rod . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
36.4 Operating Latch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
37. Underthread Gripper by Sub-class - 211000 and - 241000 . . . . . . . . . . . . . . . . . . . . 58
38. Underthread Puller by Sub-classes - 211000 and - 241000 . . . . . . . . . . . . . . . . . . . 60
39. Short Trimmer for Underthread and Gimps by Sub-class - 241000 . . . . . . . . . . . . . . . . 61
40. Gimp Pulling Device by Sub-class - 241000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
41. Mechanical Upper Thread Catcher by Sub-classes - 211000 and - 241000 . . . . . . . . . . . 64
42. Long Trimmer for Underthread and Gimps by Sub-class - 221000 . . . . . . . . . . . . . . . . 65
42.1 Position of the Underthread and Gimp Clamp . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
42.2 Cutting Pressure and Cutting Movement of the Underthread and Gimp Trimmer . . . . . . . . 67
42.3 Thread Seperator for Underthread and Gimp . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
42.4 Thread Gripper and Thread Deflector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
42.5 Underthread Puller for the Cutting Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
42.6 Underthread Puller for the Secure Seam Beginning . . . . . . . . . . . . . . . . . . . . . . . . 73
43. Grinding the Thread Trimming Knives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
43.1 Grinding of the Upper Thread Knife . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
43.2 Grinding the Scissors Knives for Sub-class - 241000 . . . . . . . . . . . . . . . . . . . . . . . 76
43.3 Grinding the Knives for Sub-class - 221000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
1. General
These Service Instructions 558 describe in a practical order the
settings for the sewing machine.
ATTENTION
The tasks described in the service instructions may only be conducted
by specialists or suitably trained personnel !
Since various setting positions are interdependent it is essential that
the settings be made keeping to the order described.
ATTENTION Danger of Breakage
After disassembly and before recommissioning of the sewing machine
the testing described in the Chapters 11,12,14,16,18,24 and 28 is to
be conducted !
With material in place and the needle making a stitch the machine may
not be advanced using the hand crank.
Caution Risk of Injury
Prior to repair, conversion and maintenance work pull the mains plug.
Adjustment work and function testing with the machine running may
only be conducted with the greatest caution while observing all safety
measures.
3
2. Handwheel
The freeing of the drive pulley 6 when turning off the machine is done
by disengaging the handwheel 1.
The timing for the disengagement is determined by the switch surface
3.
The turn-off link 5 with the roller 4 lies onto the handwheel.
When reaching the switch surface it releases and the disengaging
roller 2 falls in to disengage the handwheel.
Caution Risk of Injury !
Pull the mains plug before setting.
In order that the full sewing speed not become effective at the brake
lever 7, the handwheel, however, reaches the end position (needle
high position) with certainty, it must be set as follows:
With the catch groove 8 of the brake cam 9 standing vertical at the top
the roller 4 should lie opposite the switch surface.
6
7
1
2
3
4
5
8
9
4
–
Loosen and remove lock nuts 12.
Attention Pressure spring !
–
Loosen screws 10.
–
Swing the coupling lever 13 to the back.
–
Pull off handwheel 1.
–
Place the handwheel on the multi-key profile of the arm shaft as
described.
–
Reset the correct locating pressure of the handwheel.
For this screw on lock nuts 12 so far that the threaded bolt 11 juts
out about 2 mm.
–
Tighten screws 10.
By deviations from the nominal speed
The above described setting of the handwheel must be changed if the
motor, because of the allowable voltage range, does not reach the
given nominal speed.
With
higher
sewing speed:
–
Position the handwheel so that, with the above setting, the catch
groove 8 of the brake cam 9 lies farther to the back.
The turn-off position is reached
earlier
.
With
lower
sewing speed:
–
Position the handwheel so that, with the above setting, the catch
groove 8 of the brake cam 9 lies farther to the front.
The turn-off position is reached
later
.
ATTENTION !
Danger of needle breakage and damage to the material when the
quick transport is activated !
By the following setting it must be assured that the handwheel reaches
the end position (Needle high position) with certainty.
Check the setting of the handwheel as well as the braking effect by
repeatedly turning on the machine !
10
11
12
13
5
3. Turn-off Lever
The turn-off lever 1 is set with the gauge (Order no. 558 1635).
Caution Risk of Injury !
Pull the mains plug before setting.
–
Loosen screw 11.
–
Set stop 9 as far forward as possible.
–
Loosen screw 2.
–
Press the turn-on link 3 manually to the back.
The idle lever 8 fall downward and encompasses with its groove
the pin 5.
–
Hold the idle lever 8 down.
At the same time turn the hand crank drehen until the roller 6 of the
turn-on link 3 reaches the highest point of the overrun surface 7 of
the length setting slide.
–
Tighten screw 2 again.
–
Loosen screws 4.
–
Between the setting plate 10 of the turn-off lever 1 and square
stone 12 set a clearance of 0.5 mm.
Use the gauge for this.
When the edge is worn (after a longer period of switching use) turn
the square stone 90°.
The correct position of the square stone is always shown by a
groove.
–
Tighten screws 4 again.
1
2
3
4
5
6
7
8
9
10
11
12
6
4. Brake Lever
Through the brake lever 11 the handwheel is arrested in the end
position of the machine (needle high position).
For this the leaf spring assembly 5 falls into the groove of the brake
cam 2.
The brake lever is set with the gauges (Order no. 558 1636 for 1 mm
and 558 1634 for 0.3 mm).
Caution Risk of Injury !
Pull the mains plug before setting.
–
Lift the idle lever 7.
The turn-on link 6 jumps from the highest point of the length setting
slide (see setting chapter 3).
The square stone 8 moves under the setting plate 9 of the turn-off
lever 1 and arrests the three-armed lever 10.
–
Loosen attachment screw 3.
–
Between leaf spring 5 of the brake lever 11 and the position of
greatest eccentricity of the brake cam 2 set a clearance of 1.3 mm.
To measure the clearance use the gauges ( Order no. 558 1636 for
1 mm and 558 1634 for 0.3 mm ).
–
Set the brake lever tight.
For this insert a screwdriver between the sides of the machine arm
and the clamping block 4.
Press the screwdriver to the right and hit lightly against the shaft
end 12.
–
Tighten attachment screw 1 again.
–
Check the clearance of 0.5 mm as per chapter 3 and the dimension
1.3 mm again.
If necessary, it is essential to correct the required dimensions!
1
2
3
4
5
6
7
8
9
10
11
512
7
4.1 Auxiliary Brake
The auxiliary brake supplements the brake lever with the spring
assembly for braking. A greater serviceable life of the spring assembly
is thus achieved.
Caution Risk of Injury !
Pull the mains plug before setting.
–
Bring the machine in the end position.
–
Loosen screw 2.
–
Turn the lever 3.
The clearance between the auxiliary brake 1 and the bolt 5 should
be 2 mm.
–
Tighten screw 2 again.
–
With the buttonhole machine turned on there must be an aip gap
between brake shoe and disc.
If necessary, reset lever 3.
–
Loosen screws 4.
–
Move bracket 6.
With the spring attached to bracket 6 the braking effect of the
auxiliary brake is generated.
–
Tighten screws 4 again.
–
Check the functioning of the auxiliary brake.
With the braking effect set too high the buttonhole machine does
not run into the end position.
–
Tilt up the machine head.
–
Loosen screw 7.
–
Set stop 8.
The stop 8 secures the auxiliary brake during tilting up of the
machine head. It is set so that the spring of the brake lever holds
with a slight drawing tension.
–
Tighten screw 7 again.
1
2
3
4
5
6
7
8
8
5. Coupling Lever
The coupling lever is set with the gauge (Order no. 558 1634).
Caution Risk of Injury !
Pull the mains plug before setting.
–
Arrest the three-armed lever 13 as described in chapter 3.
–
Swing the coupling lever 8 with its roller 6 up to a distance of 0.3
mm from the handwheel 3.
The gauge is used to measure the distance.
–
Slide the coupling lever sideways so that the disengaging roller 4
juts out about 0.5 mm beyond the edge 1 of the coupling path 2.
–
Tighten screws
10 (page 5)
again.
Checking the Settings:
–
Pull the turn-off lever 12 in the direction of the arrow.
The three-armed lever is released and the roller 6 lays onto the
handwheel.
There must still be an air gap between the leaf spring 11 and the
position of greatest eccentricity of the brake cam 10.
–
Turn the handwheel 3 farther in direction of the arrow up to the
turn-off position.
Upon reaching the switch surface 5 the turn-off link 7 is released.
The disengaging roller 4 falls in the coupling path 2 and frees the
drive pulley 9.
The clearance between drive pulley 9 and handwheel 3 should be
about 0.3 mm at the narrowest point.
–
If necessary, correct the sideways position of the coupling lever.
Attention !
The previously set clearance between roller 6 and handwheel 3 must
be retained hereby.
9
10
11
12
13
1
2
3
4
5
6
7
8
9
6. High-speed Wheel
After turning the handwheel into the turn-off position (needle high
position) the catches 8 of the high-speed wheel grip in the catches 3 of
the feeding shaft. The changeover from sewing to quick transport is
established.
The setting of the correct clearance between the catches is made with
the gauge (Order no. 558 1636).
Caution Risk of Injury !
Pull the mains plug before setting.
–
Press the coupling lever 6 manually so far back that the
three-armed lever 9 with the square stone 7 is arrested under the
turn-off lever 1.
–
Pull the turn-off lever 1 forward.
The three-armed lever 9 is released.
The roller 4 of the turn-off link 5 lays onto the handwheel.
The turning off of the sewing procedure is initiated.
–
Loosen nut 2 on the reversing lever 10.
–
Set the carrier bush 11 with the high-speed wheel.
The clearance between the catches 8 of the high-speed wheel
and the catches 3 of the feeding shaft should be 1 mm.
Use the gauge to measure the clearance.
–
Turn the handwheel to the turn-off position (needle high position).
The catches grip into one another. The changeover from sewing to
quick transport is established.
1
2
3
4
5
6
7
8
9
10
11
10
7. Turn-on Link with Idle Lever
For sure starting of the sewing drive the groove in the idle lever 4 must
freely enclose the pin of the roller screw.
When running into the turn-off position the turn-on link 1 is pressed so
far back by the stop 3 that the idle lever can fall in.
Caution Risk of Injury !
Pull the mains plug before setting.
–
Bring the material support plate by turning the hand crank into the
absolute end position
.
The end position is reached when the material support plate no
longer moves to the rear.
–
Press the turn-on link 1 to the back.
The idle lever 4 falls downward.
–
Loosen screw 5.
–
Set the stop 3 to in front of the pin 2 of the roller screw.
Attention !
The pin may not be trapped in the groove of the idle lever.
–
Tighten screw 5 again.
1
2
3
4
5
11
8. Setting Lever for Stitches in the Eye
The stitches in the eye of the buttonhole can be set denser by pulling
forward the stitch length regulating rail 5.
In the area of the eyes the roller 7 drops in the curved path 9 or the
roller 7 is raised by the curved path 9.
Through the setting lever 1 this causes a reduced or increased
transport advance of the material support plate.
Caution Risk of Injury !
Pull the mains plug before setting.
The setting occurs when the roller 7 is on the straight part of the stitch
length regulating rail 5.
–
Loosen screw 6.
–
Set the setting lever 1 at an angle of about 6° from the vertical to
the back.
–
Tighten screw 6 again.
–
Loosen screws 8.
–
Set the spring stop 4 so that spring 3 touches the pin 2 and there is
a clearance of 1 mm between spring stop 4 and spring 3.
In this way the setting lever 1 is stabilized in its position during
sewing of the two seam rows.
When the roller 7 runs into the curved path 9 the setting lever 1
moves forward or back.
During this movement sequence the spring stop 4 intercepts the
spring pressure.
1
2
3
4
5
6
7
8
9
9
12
9. Brake Strap
The brake strap lies as a semi-circle around the main control disc in
the forward part of the housing.
The main control disc should only be braked so much that the needle
positions in both seam rows appear uniform.
A brake strap set too loose can cause noises in the buttonhole
machine.
Caution Risk of Injury !
Pull the mains plug before setting.
–
Loosen lock nut 5.
–
Loosen brake clamps 2.
For this turn back the pressure screw 3.
–
Loosen lock nut 4.
–
With the brake strap loose run the machine through via the hand
crank.
–
Tighten the setting screw 1 by stages.
At the same time check the braking effect by turning the hand
crank. Normally only a very slight braking is required.
–
Tighten lock nut 4 again.
–
Set the brake clamps 2 as per chapter 10.
1
2
3
4
5
13
10. Brake Clamp
The brake clamp 2 brakes the feeding shaft 1.
The braking should thereby be only so strong that during running of
the machine the transport the material support plate occurs absolutely
uniform.
The setting of the braking force occurs through turning the pressure
screw 3.
Caution Risk of Injury !
Pull the mains plug before setting.
–
By sliding the transport lever 6 in direction of the arrow set the
greatest transport movement of the material support plate.
–
Turn the handwheel forward.
The transport lever moves up and the transport stroke is executed.
The lever 4 is moves onward by a certain amount.
–
Turn the handwheel
to the back
.
The transport lever moves down and the idle stroke is executed.
This movement should have
no
effect on the feeding shaft.
The lever 4 remains in its position !
–
Set the braking force accordingly by turning the pressure screw 3.
–
Tighten lock nut 5 again.
1
2
3
4
5
6
14
11. Cloth Clamp Height
The clearance between the upper cloth clamps 2 and the lower cloth
clamps 3 should be 10 mm.
The clearance is set with the gauge 3 (Order no. 558 1633) eingestellt.
Caution Risk of Injury !
Pull the mains plug before setting.
–
Loosen lock nut 4.
–
Place the gauge under the upper cloth clamps 2.
–
Set the clearance by turning the stop screw 5.
–
Tighten lock nut 4 again.
ATTENTION !
The faultless functioning of the clamp closing lever 1 is dependent on
the precise settings of chapters 11 to 15.
If one of these settings is changed, then all settings for chapters 11 to
15 (in this order) must be made.
1
2
3
4
5
15
12. Cloth Clamp Pressure
Through the spring-mounted clamp frame 2 found under the material
support plate the pressure of the upper cloth clamps is automatically
adjusted to the material thickness.
The pressure of its compensation springs 4 is set at the factory.
Normally it should not be altered.
The clearance between the upper frame piece 3 and the lower frame
piece 4 should be 14.2 mm up to +0.5 mm.
The setting is only possible with clamp frame removed.
The cloth clamp pressure must be set so that even the thinnest
material to be sewn is still securely clamped.
Caution Risk of Injury !
Pull the mains plug before setting.
–
Remove the upper cloth clamps 7 after loosening the mounting
screws 8.
Caution ! Do not lose the spring washers lying inbetween.
–
Loosen the four attachment screws 1.
–
Hold the clamp operating lever in the rear position.
–
Place a 4 mm thick item between the clamp bracket 7 and the
lower cloth clamps.
–
Pull the cClamp operating lever forward to the stop.
–
Tighten the four attachment screws 1 uniformly.
The clamp pressure for a normal setting is made.
–
Screw the upper cloth clamps 7 on again.
Thereby place the spring washers inbetween.
ATTENTION !
The flawless functioning of the clamp closing lever is dependent on the
precise settings of chapters 11 to 15.
If one of these settings is changed, then all settings for chapters 11 to
15 (in this order) must be made.
1
2
3
4
5
6
7
8
9
10
16
13. Pressure Point of the Clamp Operating Lever
In order to prevent a jumping up of the upper cloth clamps during
sewing the clamp operating lever 1 must be set a little beyond its
strongest pressure point.
Exceeding the pressure point too much can result in:
–
Unwanted weakening of the cloth clamp pressure.
–
The cloth clamps are no longer opened automatically by the clamp
closing lever.
Setting and checking is to be conducted with the clamping plates in
place.
Caution Risk of Injury !
Pull the mains plug before setting.
–
Loosen lock nut 3.
–
By turning the setting screw 1 suitably set the pressure point.
–
Tighten lock nut 3 again.
–
Check the cloth clamp pressure (see chapter 12).
ATTENTION !
The settings of the pressure point and the cloth clamp pressurees are
interdependent.
If one of these settings is changed, then all settings for chapters 11 to
15 (in this order) must be made.
1
2
3
17
14. Pressure of the Clamp Closing Lever
When starting the sewing procedure the upper cloth clamps are
automatically closed by the movement of the clamp closing lever 3.
The clamp operating lever 2 must thereby be moved with certainty in
front of the stop screw 4.
For this in the lowest position of the closer 1 there must be a clearance
of 0.1 mm between it and the angle lever 5.
Caution Risk of Injury !
Pull the mains plug before setting.
–
Turn the hand crank until the closer 1 reaches its lowest position.
–
Loosen screws 6.
–
Set a clearance of 0.1 mm between closer 1 and angle lever 5.
–
Tighten screws 6 again.
ATTENTION !
The flawless functioning of the clamp closing lever is dependent on the
precise settings of chapters 11 to 15.
If one of these settings is changed, then all settings for chapters 11 to
15 (in this order) must be made.
3
4
5
6
1
2
18
15. Position of the Clamp Closing Lever
On the clamp closing lever 1 are to be found the closer 5 for automatic
closing and the tappet 6 for automatic opening of the clamping plates.
Depending on the execution of the Sewing machine for
a) cutting after sewing
b) vor and cutting after sewing
different settings of the clamp closing lever become necessary.
Caution Risk of Injury !
Pull the mains plug before setting.
a) Cutting after sewing
–
With clamping plates closed turn the sewing machine out of the
end position with the hand crank until the hook block has turned
180°.
In this position the underthread tension 4 points to the rear (shown
in the picture to the front).
–
Turn farther until the cutter bar lowers and the cutting block lies
above the knife.
–
Loosen screw 3.
–
Set the tappet 6 tight on the angle lever 2 by pulling up on the
clamp closing lever 1.
–
Tighten screw 3 again.
ATTENTION !
The flawless functioning of the clamp closing lever is dependent on the
precise settings of chapters 11 to 15.
If one of these settings is changed, then all settings for chapters 11 to
15 (in this order) must be made.
1
2
3
4
5
6
19
b) Cutting before and after sewing
By sewing machines laid out for cutting before and after sewing two
cams on the main control disc control the movement of the clamp
closing lever.
The first cam in the direction of turn conducts the closing movement
for cutting before sewing and the second cam for cutting after sewing.
Two stops, between which the clamp closing lever can be adjusted,
limit the positions.
Caution Risk of Injury !
Pull the mains plug before setting.
–
With clamping plates closed turn the sewing machine out of the
end position with the hand crank until the hook block has turned
360°.
In this position the underthread tension 5 points to the front.
–
Move stop 6 in direction N (see sticker) until touching.
–
Turn the sewing machine out of the end position with the hand
crank until the hook block has turned 360°.
In this position the underthread tension 5 points to the front again.
–
Turn a bit farther until the closing movement of the clamp closing
lever downward starts (for cutting before sewing).
–
Turn farther until the clamp closing lever moves upward again.
With the upwards movement the tip of the tappets 4 must move
past as close as possible to the tip of the angle lever 3. The two
tips may not, however, thereby touch.
–
Loosen screw 2.
–
Set clamp closing lever 1 appropriately.
–
Tighten screw 2 again.
–
Bring stop 7 to touching in direction V (see sticker).
ATTENTION !
The flawless functioning of the clamp closing lever is dependent on the
precise settings of chapters 11 to 15.
If one of these settings is changed, then all settings for chapters 11 to
15 (in this order) must be made.
1
2
3
4
5
6
7
20
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