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3) Adjusting the Lower Shaft Gear and the Rocking Shaft Gear
A. Unfasten screws ① and ②.
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.
[ Caution ]
The machine may not operate when the rocking shaft gear in not in the right position.
C. Have the oscillator shaft collar(right) stick to the bed surface
②.
D. Turn the oscillator shaft collar(right), still sticking to the bed surface
arrow and make adjustments so the end of the shuttle drive will rotate smoothly with the
backlash of under 0.1mm.
[ 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.
E. Tighten screw ① back on firmly.
4) Adjusting the Spring on the Upper Side of the Shuttle
After removing the lower feed plate and the needle plate from the machine, unfasten the screw of the
spring on the upper side. Then, adjust the spring on the upper side of the shuttle so that the backside of
the needle and comes to point
middle of interval
[ Caution ]
The thread may be disconnected or the thread strand may be unfastened if there are scratches or if the surface
is rough around the spring groove on the upper side of the shuttle. Always check the surface of the spring
before operating the machine.
①
24
①
②
in the vertical direction, and the center of the needle will come to the
horizontally. After the adjustment is done, tighten the screw back on firmly.
①
, and then tighten the collar screw
Backlash : 0.1mm and below
Oscillator Shaft
Collar(R)
①
, in the direction of the
[Fig. 31]
①
①
[Fig. 32]
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