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Adjustment
15
Thread check spring and slack thread regulator
.06.11
O Turn the thread tension 1 ( screw 2 ) according to rule 1.
O Adjust the slack thread regulator 3 ( screws 4 ) according to rule 2.
18
Rule
1. The movement of the thread check spring should be finished when the needle point
punctures the material ( spring deflection: approx. 7 mm).
2. The thread check spring should have moved approx. 1 mm when forming the maxi-
mum thread loop while passing the thread around the hook.
Fig. 15 - 12
It may be necessary to deviate from the specified spring deflection for reasons
relating to the sewing technology.
Adjust the slack thread regulator 3 (screw 4) by " + " (= more thread) or
" - " (= less thread).
4
+
3
2
-
1
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