Pfaff 1425 Instruction Manual page 57

11. Thread check springs and regulators on the PFAFF 1426
04.17
Requirement
1. The movement of thread regulators 3 and 6 must be completed when the needle
enters the material.
2. When the thread loop is opened to its largest amount while being passed around the
sewing hook, thread check springs 3 and 6 must rise slightly from rests 1 and 9.
Fig. 11 - 17
Position rest 1 (screw 2) according to Requirement 1.
To adjust the tension of thread check spring 3, turn screw 4 (screw 5).
To adjust the tension of thread check spring 6, turn sleeve 7 (screw 8 ).
Position rest 9 (screw 10) according to Requirement 1. (If the adjustment range is too
small, rest 9 can be screwed into another hole.)
Position thread regulator 11 (screw 12) according to Requirement 2.
11
+
6
9
4
For technical sewing reasons it may be necessary to deviate from the indicated
spring stroke or spring tension.
Move thread regulator 11 (screw 12) to " + " ( = more thread) or " - " ( = less
thread).
5
12
3
1
8
10
7
Adjustment
-
2
11 - 21