Adjustment
11 - 22
7 mm
1
6
4
9
7
2
11.04.20 Thread check spring (on two-needle machines with - 900/56)
Requirement
The motion of the thread check springs 1
and 6 should have ceased when the needle
points enter the material ( = approx. 7 mm spring stroke).
Fig. 11 - 20
● Turn screw 2 (screw 3) to adjust the tension of thread check spring 1.
● Turn retainer 4(screw 5) in accordance with the requirement.
● Turn screw 7 (screw 8) to adjust the spring resistance of thread check spring 6.
● Turn retainer 9 (screw 10) in accordance with the requirement.
Due to technical reasons, the length of the thread-check spring stroke can vary
a little in either direction.
3
810
5
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