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8.11.3) Adjustment of Trimmer Cam and Lever
Positions
The rotary movement of the fixed blade is
determined by the position of the trimmer cam⑨.
When the thread take-up lever is at the highest
position, the trimmer lever roller⑧ touches the
highest tip of the trimmer cam⑨,⑩. However,
during sewing, the roller and the cam do not contact
each other and the distance between them is
maintained at 0.1mm. Adjustment can be made in the
following order:
1) Unfasten the trimmer cylinder block fixing
screws①,②.
2) Adjust the trimmer cylinder piston to place the
roller 1mm away from the lowest point of the
trimmer cam. Then fasten the fixing screws①,②.
3) Unfasten the trimmer cam fixing screws③,④,⑤.
4) Adjust the trimmer cam with the needle bar at the
lowest point. Arrange ⑥,⑦,⑧ in a straight line
and fasten the trimmer cam fixing screws③,④,
⑤.
8.12) Safety Clutch
The safety device for the lower shaft timing pulley ② is
to prevent hook damage caused by thread winding
around the hook or the setting disruption.
1) Slightly loosen two piston stopper screw nuts③.
2) When the two piston stopper screws① are turned
clockwise, it increases torque, and vice versa. After
torque adjustment, tightly fasten the nut③.
1mm
①
②
②
④
③
⑤
⑧
③
⑦
⑤
⑥
④
[Fig. 8-20]
①
③
[Fig. 8-21]
41
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