Adjustment
11 - 17
11
.05.15
Thread check spring and slack thread regulator
Requirement
1. The motion of the thread check spring must be completed 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 have moved by approx.
1 mm
.
●
Turn thread tension
1
(screw
2
) according to
requirement 1
.
●
Turn thread tension
3
(screw
4
) according to
requirement 2
.
Due to technical sewing reasons it may be necessary to deviate from the
spring stroke indicated above.
Move the slack thread regulator
3
(screw
4
) toward the "
+
" (= more thread) or
toward the "
-
" (= less thread)
4
3
-
1
2
+
Fig. 11 - 16
7 mm
