Adjustment

1.04.25 Thread check spring (PFAFF 571 and 591)

Requirement

1.The movement of thread check spring 7 should be completed when the needle point penetrates the fabric (spring stroke approx. 7 mm).

2.When the largest thread loop is formed while the thread is passed around the hook, the thread check spring 7 should rise slightly from its support

4

61-046

5 6

1

2

 

7

Fig. 1 - 25

3

●Adjust support 1 (screw 2) according to requirement 1.

●To adjust the spring tension turn screw 3 (screw 4).

●Adjust the thread regulator 5 (screw 6) according to requirement 2.

For technical reasons it may be necessary to deviate from the specified spring stroke or spring tension.

Move the thread regulator 5 (screw 6) towards "+" (= more thread) or "-" (= less thread).

34