Pfaff 1425 Instruction Manual page 56

Adjustment
11. Thread check spring and regulator on the PFAFF 1425
04.16
11 - 20
Requirement
1. The movement of thread check spring 7 must be completed when the needle point
enters the material.
2. When the thread loop is opened to its largest amount while being passed around the
sewing hook, thread check spring 7 must rise slightly from rest 1.
1
Fig. 11 - 16
Position rest 1 (screw 2) according to Requirement 1.
To adjust the spring tension, turn screw 3 (screw 4).
Position thread regulator 5 (screw 6 ) according to Requirement 2.
For technical sewing reasons it may be necessary to deviate from the indicated
spring stroke or spring tension.
Move thread regulator 5 (screw 6) to " + " ( = more thread) or " - " ( = less
thread).
4
6
5
+
7
3
-
2