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5.
CLEARANCE BETWEEN NEEDLE AND ROTARY HOOK POINT AND LOOP LIFT
STANDARD
When the needle is raised 2.2 - 2.6 mm from its lowest position, the rotary hook point should be at the side of the
needle. The gap between the needle (75/11) and rotary hook point at this time should be less than 0.1 mm with
no contact between the rotary hook point and the needle.
ADJUSTMENT
* Remove the inner rotary hook before adjusting.
1.
Loosen the two set screws of the rotary hook pulley.
2.
Adjust so that the rotary hook should be at the side of the needle when the needle is raised 2.2 - 2.6 mm
from its lowest position.
3.
Tighten the two set screws of the rotary hook pulley.
4.
Loosen the screw.
5.
Turn the set screw in or out so that the clearance between the needle and the rotary hook point is less than
0.1 mm.
6.
Tighten the screw.
