Pfaff 1425 Instruction Manual page 56

Adjustment
11. Thread check springs and regulators on the PFAFF 1426
04.17
11 - 20
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.
11
6
9
4
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.
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
7
8
2
10
-