Happy HCS2-1201-30, Руководство по обслуживанию

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3-5-2 Adjustment of retainer on rotary hook
1. Loosen screw to the extent that retainer on bobbin case holder moves.
2. Install screw for Needle plate. (only front side)
(This avoid interfere of screw and Rotary hook retainer during installing Needle plate)
3. Adjust position back and forth, left and right.
Space has to be [ 0.8mm ] and the position right and left is center of the needle.
0.8mm
Needle center and retainer center should come to same position.
Retainer positioning gauge [ 0.8mm ] Needle center position
4. Adjustment has finished.