Counter-Knife And Lower Thread Clamp - DURKOPP ADLER 867 Service Instructions Manual

2.14.3

Counter-knife and lower thread clamp

42
1
Caution: Danger of injury !
Turn the main switch off !
Check and set the counter-knife and lower thread clamp only
with the sewing machine turned off.
Standard checking
In the thread-pulling knife's "parking position" the thread clamp 1 is
supposed to bear without any pressure on the thread-pulling knife.
The thread is to be trimmed safely with as little pressure as possible. A
low trimming pressure keeps the knife wear low!
It must be possible to safely trim two of the thickest sewing threads
simultaneously.
–
Turn the handwheel until the thread-pulling knife can be swung out.
–
Swing out the thread-pulling knife manually.
In order to do so push the block with the roller 4 to the right against
the control cam 3.
–
Insert two threads to be trimmed into the thread-pulling knife.
–
Continue turning the handwheel until the knife has swung back.
–
Check whether the sewing threads have been trimmed properly.
–
Pull the threads out of the clamp and, in doing so, check the
clamping effect.
If the clamping effect is too high or too low, the thread clamp must
be reset again.
ATTENTION !
If the pressure of the counter-knife is set to high this leads to an
excessive knife wear.
A wrong thread clamp setting can lead to problems with sewing start.
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