Brother BL6200, Service Manual

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6. POSITION OF ROTARY HOOK
STANDARD
When pattern dial is set to zigzag stitch, zigzag width dial is set to "5" (the needle is at the left side) and
needle raises from its lowest position by 2.75 ~ 3.15 mm, the pointed end of rotary hook should meet with
right side of needle.
Under this condition, clearance between the hook and the needle should be less than 0.1 mm and the hook
should not hit the needle.
ADJUSTMENT
1. Set pattern dial to zigzag stitch and zigzag width dial to "5". (the needle is at the left side)
2. Loosen three screws on lower shaft gear.
3. Adjust position of rotary hook. (When needle raises from its lowest position by 2.75 ~ 3.15 mm, the
pointed end of rotary hook should meet with right side of the needle.)
4. Tighten three screws.
5. Adjust clearance by turning clearance adjusting eccentric screw.