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6.4) Adjustment of Shuttle Upside Spring Position (BS : Semi-rotary)
－ Disassemble the lower feed plate and the needle plate in order to enable the adjustment of the shuttle upside spring.
－ Loosen the tightening screw which fixes the shuttle upside spring. Place the upper side of the spring in the middle of the
back of the needle and the width as in the figure. And then fasten the shuttle upside spring.
Tightening Screw
6.5) How to adjust the ascending range of button clamp
To adjust the ascending range of button clamp, take out its tension adjusting screw①, loosen the fixed screw②, adjust the
holder bar of button clamp③ up and down to place it to the suitable position, then tighten the fixed screw②. And attach the
tension adjusting screw① on the original position again.
※ The maximum rising height of button clamp is 13mm from the presser foot.
(The rising height of button clamp upon delivery is adjusted to 10~11mm.)
①
③
②
13mm
If the area near the shuttle upside spring’s groove is scratched or grows rough, it may cause
thread break and the separation of thread strands. To prevent it, check the status of the shuttle
upside spring.
Caution
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