Adjustment
13.04.17 Thread check spring
Requirements
1. The motion of the thread check spring 7 must be finished when the needle point
enters the material (spring stroke approx. 7 mm).
2. When the thread loop is at its largest when going around the hook, the thread check
spring must raise slightly from the workpiece rack 1.
13 - 20
_
6
5
+
7 mm
2
7
1
3
4
Fig. 13 - 16
● Move workpiece rack 1 (screw 2) in accordance with requirement 1.
● Turn screw 3 (screw 4) to adjust the strength of the spring.
● Move the slack thread regulator 5 (screw 6) in accordance with requirement 2.
Due to technical sewing reasons it may be necessary to deviate from the
spring stroke / spring strength mentioned here.
Move the slack thread regulator 5 (screw 6) toward the "+" (= more thread)
or toward the "-" (= less thread).
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