Adjustment
13.05.15 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 sp- ring must have moved by approx. 1 mm.
4
-
+
3
1
2
7 mm
Fig. 13 - 16
●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
13 - 17