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3) Adjusting the Lower Shaft Gear and the Rocking Shaft Gear
A. Unfasten screws ① and ②, ③
B. While having the upper shaft turning, move the rocking shaft gear in the direction of the arrow to the position where
it will move easily without load.
C. Have the oscillator shaft collar (right) stick to the bed surface , and then tighten the collar screw.
D. Turn the oscillator shaft collar (right), still sticking to the bed surface , in the direction of the arrow and make
adjustments so the end of the shuttle drive will rotate smoothly with the backlash of under 0.1mm.
[ Fig. 36 ]
E. Tighten screw ① and ③ back on firmly.
③
①
Backlash 0.1mm and Below
②
Oscillator Shaft Collar(R)
4) Adjusting the Position of Shuttle Upper Spring
After removing the lower feed plate and the needle plate from the machine, unfasten the screw of the shuttle upper
spring. Then, adjust the shuttle upper spring so that the backside of the needle and comes to point in the vertical
direction, and the center of the needle will come to the middle of interval horizontally. After the adjustment is done,
tighten the screw back on firmly.
[ Fig. 37 ]
①
①
①
The machine may not operate when the rocking shaft gear in not in the right position.
Caution
If there is too much backlash the machine may make more noise than usual during
operation. And if there is not enough backlash, the machine may not operate.
Caution
The thread may be disconnected or the thread strand may be unfastened if there are
scratched or if the surface is rough around the shuttle upper spring. Always check the
surface of the spring before operating the machine.
Caution
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