Baby Lock BL7800, Service Manual

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14. INNER ROTARY HOOK BRACKET POSITION
STANDARD
When the inner rotary hook bracket and the rotary hook meet, the spring of the inner rotary hook bracket and the
inner rotary hook should overlap each other by 1.9-2.1 mm.
ADJUSTMENT
1. Loosen the screw securing the inner rotary hook bracket.
2. Adjust the position of the inner rotary hook bracket by moving it vertically and/or horizontally.
NOTE: Surface A of the inner rotary hook bracket should be perpendicular to the feeding direction.
3. Tighten the screw of the inner rotary hook bracket.
15. INNER ROTARY HOOK TENSION
STANDARD
While slowly pulling polyester thread #60 using a tension gauge, inner rotary hook tension should be 10-12g. The
difference between this and the tension for silk thread (#80) should be 2-3g.
ADJUSTMENT
1. Pass polyester thread #60 through the inner rotary hook correctly, and pull it using the tension gauge.
2. Adjust the tension by turning the screw to either the right or left using a screwdriver.
NOTE: After adjusting the tension, lock the screw with paint.
polyester thread (#60)
10 - 12g
1
2