Thread Check Spring - Pfaff 1122 Adjustment Manual

12

Thread check spring

.05.12
Requirement
1. The movement of thread check springs 3 and 6 must be finished when the needle point
enters the material ( spring stroke approx. 7 mm).
2. When the thread loop is at its largest while being passed around the sewing hook, the
thread check springs 3 and 6 must rise slightly from rests 1 and 9.
Fig. 12 - 13
Adjust rest 1 (screw 2) in accordance with requirement 1.
To adjust the spring tension of thread check spring 3, turn screw 4 (screw 5).
To adjust the spring tension of thread check spring 6, turn bush 7 (screw 8).
Adjust rest 9 (screw 10) in accordance with requirement 1. (If the adjustment range is
too small, rest 9 can be screwed into another opening.)
Adjust thread regulator 11 (screws 12) in accordance with requirement 2.
12
+
-
11
7 mm
3
6
1
2
9
8
7
10
Adjustment
5
109-089
4
12 - 14