Adjustment
64
Fig. 12 - 08
50-063
7 mm
4
3
2
1
4
+
-
12
.05.07
Thread check spring and slack thread regulator
Requirement
The motion of the thread check spring must be completed when the needle point en-
ters the material (spring stroke approx.
7 mm
).
When the thread loop is at its largest when going around the hook, the thread check
spring must have moved by approx.
1 mm
.
1.
2.
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)
●
●