Adjustment
19
15.04.14 Thread check spring (on the PFAFF 1591 and 1593)
Requirement
1. The movement of thread check spring 3 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 3 should rise slightly from its support 1.
● Adjust support 1 (screw 2) according to requirement 1.
● To adjust the spring tension of spring 3 turn bushing 4 (screw 2).
● Adjust the thread regulator 5 (screw 6) according to requirement 2.
For technical reasons it may be necessary to deviate from the specifi ed
springstroke or spring tension.Move the thread regulator 5 (screw 6) towards
"+" (= more thread) or "-" (= lessthread).
Fig. 15 - 14
6
5
3
2
4
1
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