13 - 49
Adjustment
13.07.07 Manual cutting test
Requirement
1. When thread catcher 1 is on its forward stroke, it must not carry bobbin thread 3 forward too.
2. When thread catcher 1 is in its front position, bobbin thread 3 must be held reliably by
hook 4.
3. After the trimming action, both the needle thread and the bobbin thread must be
perfectly cut and bobbin thread 3 retained.
● Sew a few stitches.
● Turn off the on/off switch.
● Carry out the cutting operation manually.
● Check requirement 1 and 2, and if necessary readjust thread catcher 1 in accordance
with Chapter 13.07.04 Position of the thread catcher.
● Check requirement 3, and if necessary readjust the bobbin thread retaining spring 2 in
accordance with Chapter 13.07.06 Bobbin thread retaining spring.
2
1
3
Fig. 13 - 45
3
4
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