Adjustment
14 - 55
● Loosen screw 5 and move thread monitor finger 1 in accordance with requirement1.
● Tighten screw 5.
● Loosen nut 6 and move the weight 7 in the elongated hole in accordance with require-
ment 2.
● Tighten nut 6.
● Loosen grub screw 8 and turn the lever 9 in accordance with requirement 3 taking care
that the thread monitor finger does not have any axial play.
● Tighten grub screw 8.
The thread monitor finger 1 must be still while sewing. It must not vibrate. If
necessary move the weight 7 again.
1.0 mm
2
1
4
3
5
1 to 2 mm
7
6
9
8
14.23 Needle thread monitor
Requirement
1. The clearance between the thread monitor finger 1 and the thread guide eye 2 must be
1.0 mm.
2. The thread monitor finger 1 must be held only by the needle thread.
3. In the case of the needle thread breaking, the thread monitor finger 1 must move far
enough to the right so that the point of the finger 3 is approx. 1 to 2 mm above the pin
of the knife latch 4.
Fig. 14 - 53
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