Manual Cutting Test - Pfaff 1571 Instruction Manual

13

Manual cutting test

.07.07
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.
Fig. 13 - 45
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.
3
2
1
Adjustment
3
4
61-108
13 - 49