31
8-9. Adjusting trimming time
1. Turn pulley to raise needle bar by 10~20° from the lowest
position.
2. Push the trimming lever① so that the thread trimming knife
③ on the hill of the movable knife② is about 1~1.5mm
more protruded than the end of the fixed knife④.
3. Push the trimming solenoid shaft⑥ manually while the
trimming cam fixing screw⑤ is loose.(At this point, the
appropriate distance between the initial trimming cam⑦ and
the roller single screw⑧ is 0.5mm.)
4. Turn the trimming cam⑦ manually so that the edge⑨ of the
roller driving part on the trimming cam⑦ touches the roller
⑩. Then tighten the trimming cam fixing screw⑤.
5. Connect the return spring.
[ Figure 50 ]
8-10. Adjusting and replacing knife
8-10-1. Adjusting fixed knife
1. First, loosen the fixed knife tension adjusting nut① with a
wrench box and then loosen the tension adjusting screw②.
2. Adjust the tension adjusting screw of the fixed knife when
the movable knife-edge meets the fixed knife-edge.
3. Adjust knives so that the knife edges meet without too much
tension.
4. After adjustment, make sure to tighten the tension adjusting
nut① using the wrench box in the accessory box.
⑤
⑦
⑦
⑩
⑨
⑦
Thread trimmer shaft
Lower shaft
⑧
⑧
0.5mm
[ Figure 49 ]
①
③
②
④
1~1.5mm
[ Figure 51 ]
②
①
Fixed Knife
Movable Knife
Wrench Box
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