Adjustment
13.07.15 Scissor function test
Requirement
1. The threads must be cut neatly.
2. After being trimmed, the bobbin thread must be held securely by the thread trapper.
Fig. 13 - 47
● Turn the machine on.
● Sew a few stitches and turn the on/off switch off.
● Activate the engaging lever by hand and close the post cover while ensuring that
pressure disk 1 is inserted into the post cap.
● Bring the needle bar to TDC by turning the handwheel and open the post cover.
● In this position the needle and bobbin threads must be held by the catching lug 2 of
bobbin case and the needle thread must be held by the catching lug 3 of bobbin.
● If the needle thread is not held, insert a new pressure disk 1 ( part no. 91-119 492-91 ).
● Turn the handwheel and observe the cutting process.
● When the scissor is moving forward, the thread trapper must first trap and hold the
4
2 3
1
13 - 52
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