Adjustment
12 - 36
12.
05.15
Scissor function test
Requirements
1. The threads must be cut neatly.
2. After being trimmed, the bobbin thread must be held securely by the thread trapper.
Fig. 12 - 32
●
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 stuck 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 of bobbin
case
2
and the needle thread must be held by the catching lug of bobbin
3
.
●
If the needle thread is not held, stick in a new pressure disk
1
( part no. 91-119 492-91 ).
●
Turn the handwheel and observe the cutting process.
●
When the scissor is advancing, the thread trapper must first trap and hold the threads
on the scissor ( if necessary adjust the thread trapper as required after loosening
retaining screw
4
).
1
3
2
4
