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6.3) Adjustment of Lower Shaft Gear and Oscillating Shaft (BS : Semi-rotary)
Loosen tightening screws
Rotate the upper shaft and move the oscillating gear in the arrow direction to find the position where the gear can
smoothly operate without any load.
Attach the oscillating shaft collar (right) to the bed face
Turn the oscillating shaft collar (right) in the arrow direction, while it is closely attached to the bed face
place where the roll driver can smoothly rotate with the backlash of 1mm or below.
1) If the oscillating gear is not properly positioned, the machine may not operate.
2) If the backlash is excessive, the machine might cause increasing noises during operation. If the
backlash is too small, the machine might not operate.
Caution
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
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
,
, and
.
and fasten the collar screw .
Oscillating Shaft
Collar (right)
, to find the
Backlash: 0.1mm or below
25
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