Adjustment
13 - 20
13.04.17 Thread check spring
Requirements
1. The motion of the thread check spring 7 must be finished when 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.
4
Fig. 13 - 16
_
2
7 mm
7
1
6
5
+
3
● 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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