23.3 Position of the looper thread and gimp clamp
Caution: Danger of injury !
Adjust the position of the looper thread and gimp clamp only with the
machine switched off.
Standard checking
The long-trimmer clamps both the looper thread and the gimp under a
clamping sheet. looper thread and gimp have to be held as tight that a
safe and tight seam beginning is guaranteed.
Before the cutting operation at the stationary knife starts, looper thread
and gimp thread must be pulled between the lower
clamping spring 2 and the clamping piece 1.
In order to ensure that the gimp and the looper thread are safely pulled
between clamping spring 2 and clamping piece 1 before cutting, the
clamping spring is opened by the release sheet 3 above the pin 4.
The opening width depends on the thickness of the bobbin and gimp
thread used.
The clamp must be opened at least as wide as to ensure that the
threads are safely pulled in front of pin 4 and that they are not pulled
out of the thread clamp after thread trimming.
When the blade of the thread catcher 5 is approx. 1 mm in front of
knife 6, the release sheet 3 must close the thread clamp again.
The pin 4 must then be free again.
The tip 7 of the thread catcher must push itself under the looper thread
and the gimp.
Correction
Opening w idth
–
Align the height of the release sheet 3 so that the clamping spring
for looper thread and gimp is opened.
Tim e
–
Loosen the screws 8 slightly.
–
Turn the thread clamp 9 so that it is closed when the blade of the
thread catcher is 1 mm in front of the knife.
–
Tighten the screws 8.
Clamping force
–
Adjust the pressure of the clamping spring 2 by aligning so that the
looper thread is slightly clamped after trimming and does not jump
back.
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