Pfaff 1571 - Thread Check Spring Adjustment (1571;1591)

13 - 25
Adjustment
13.04.21 Thread check spring (PFAFF 1571 and 1591)
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
_
2
7 mm
7
1
6
5
+
3
Fig. 13 - 21
● 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).
61-046
4