Adjustment
14 - 23
14.21 Needle rise, final adjustment of the needle bar height and bobbin case
positioning finger
Requirement
With the needle bar at a position 1.8 mm past its BDC (hole 4):
1. the hook point must be opposite the center line of the needle, and the top edge of the
needle eye must be 0.8 mm below the bottom edge of the sewing hook.
2. There must be a clearance of 0.5 mm between the lug of the positioning finger 3 and
the inside edge of the positioning slot.
● Adjust the hook (screws 1) - without shifting it - and the needle bar (screws 2) - without
twisting it - in accordance with requirement 1.
● Set the lug of positioning finger 3 into the slot in the bobbin case carrier and adjust and
secure it in accordance with requirement 2.
2
1
3
0.5 mm
Fig. 14 - 21
0.8 mm
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