Adjustment

11.04.15 Thread check spring on PFAFF 1246 with thread trimmer -900/56

Requirement

The motion of thread controller springs 1 and 6 should cease as soon as the needle point penetrates the material (= about 7 mm spring deflection).

Due to technical reasons, the length of the thread-check spring path can vary a little in either direction.

8 10 5

7 mm

1

4

6

2

 

 

 

7

 

 

9

3

Fig. 11 - 14a

● Turn screw 2 (screw 3) to adjust the spring resistance of thread check spring 1. ● Turn retainer 4 (screw 5) according to the requirement.

●Turn screw 7 (screw 8) to adjust the spring resistance of thread check spring 6.

●Turn retainer 9 (screw 10) according to the requirement.

11 - 17