13.2 Thread pulling knife
Standard checking
The thread pulling knife is to be set sideways so that it swings past at a
safe clearance to the nose of the bobbin case. The thread pulling knife
may not collide with the bobbin case.
The height of the thread pulling knife is to be set so that it swings as
close as possible over the bobbin without touching it.
Caution Risk of Injury !
Turnthemainswitchoff.
Set the thread pulling k nife only with the sewing machine
turned off.
Correction
Sidew ays setting
–
Loosen screws 3 and 4.
–
Set the thread pulling k nife 1 sideways as described above.
–
Tighten screws 3 and 4 again.
Height
–
Loosen screws 2 and 5 on the setting collars.
–
Set the height of the thread pulling knife.
–
Fix shaft 6 axially with the two setting collars so that the thread
pulling knife can move easily without play.
–
Tighten screws 2 and 5 on the setting collars again.
ATTENTION !
A false setting of the height can lead to following consequences:
–
No secure catching of the threads.
–
Contact of the slider.
–
Damage to the bobbin.
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