Adjustment
12 - 16
12
.04.14
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 sp-
ring must raise slightly from the workpiece rack
1
.
Fig. 12 - 14
●
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 ).
+
5
6
1
2
7
3
7 mm
4
-
Summary of Contents for 3734-12
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