Thread Check Spring - Pfaff 3834-14/11 Instruction Manual

Adjustment
13

Thread check spring

.04.13
● Move workpiece rack 1 (screw 2) in accordance with requirement 1.
● Turn screw 3 (screw 4) to adjust the tension of the spring.
● Move the slack thread regulator 5 (screw 6) in accordance with requirement 2.
13 - 15
Requirement
1. The motion of the thread check spring 7 must be completed when the needle point
enters the material (spring stroke approx. 7 mm).
2. With the thread loop at its largest when it is guided around the hook, the thread check
spring must be raised slightly above the workpiece rack 1.
Fig. 13 - 12
Due to technical sewing reasons it may be necessary to deviate from the spring
stroke / spring tension described above.
Adjust the slack thread regulator 5 (screw 6) in the direction of the " + "
(= more thread) or the " - " (= less thread).
4
5
6
+
1
7
3
-
2