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Adjustment
13.
Needle rise, hook-to-needle clearance, needle height and bobbin case
05.10
position finger
13 - 12
Requirement
With the needle at 1.8 mm after BDC,
1. the hook point 6 must point to the middle of the needle and be at a distance of
0.05 mm - 0.1 mm to the clearance cut of the needle, and
2. the top edge of the needle eye must be 0.8 mm below the hook point.
3. Between the projection of the bobbin case position finger 4 and the bottom of the
retaining groove there should be a distance of 0.5 mm.
0,05 - 0,1 mm
6
6
Fig. 13 - 11
Using the adjustment pin, position the needle bar at 1.8 mm after BDC.
Adjust the hook according to requirement 1.
Tighten screw 1.
Move needle bar 2 (screw 3) without turning it according to requirement 2.
Align bobbin case position finger 4 (screw 5) according to requirement 3.
1
2
4
0,5 mm
3
4
5
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