Adjustment
74
13.05.06 Needle bar rise, hook-to-needle clearance, needle height and bobbin case
position finger
Rule
With the needle bar positioned 1.8 mm after b.d.c.
1. The tip of the hook 6 should be at the needle midpoint and be a distance of 0.05 mm -
0.1 mm from the scarf of the needle and
2. the upper edge of the eye of the needle should be 0.8 mm under the tip of the hook.
3. There should be a clearance of 0.5 mm between the lug of the bobbin case position
finger 4 and the base of the stop groove.
Move the needle bar to a position 1.8 mm after b.d.c., see chapter 13.05.01
Adjustment aid.
Adjust the hook according to rule 1.
Tighten the screws 1.
Adjust the needle bar 2 (screw 3) without twisting according to rule 2.
Align the bobbin case position finger 4 (screw 5) according to rule3.
3
2
0.8 mm
0.05 - 0.1 mm
6
1
0.5 mm
4
4
5
Fig. 13 - 07
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