Adjustment
13 - 13
4
3
-
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)
Fig. 13 - 12
13
.05.11
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 sp-
ring must have moved by approx.
1 mm
.
57-04a
7 mm
Содержание 2483-980/31
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