Adjustment
14 - 45
● Dismount the needle thread scissor 1.
● Carry out a cutting test in accordance with requirement 1.
● Carry out a lifting test in accordance with requirement 2.
● If necessary, adjust the clamp spring 2 or roughen the clamp surfaces.
● Fit the needle thread scissor 1 to the machine.
The thread must not be clamped so tightly that it is damaged!
There must not be any sharp edges on upper blade 3. The clamp surface of
upper knife blade 3 must be sufficient. Smooth clamp surfaces impair the
clamping effect!
2
1
3
Fig. 14 - 43
14.20 Needle thread scissor
14.20.01 Function check
Requirement
1. With a thread inserted, the needle thread scissor 1 must cut the thread neatly.
2. After the cutting action one thread end must remain clamped in the scissor so that it is
possible to lift the needle thread scissor 1 by holding the thread end.
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