31
8-9. Adjusting trimming time
1. Turn pulley to raise needle bar by 10~20° from the lowest
position.
2. Push the trimming lever
①
so that the thread trimming knife
③
on the hill of the movable knife
②
is about 1~1.5mm
more protruded than the end of the fixed knife
④
.
3. Push the trimming solenoid shaft
⑥
manually while the
trimming cam fixing screw
⑤
is loose.(At this point, the
appropriate distance between the initial trimming cam
⑦
and
the roller single screw
⑧
is 0.5mm.)
4. Turn the trimming cam
⑦
manually so that the edge
⑨
of the
roller driving part on the trimming cam
⑦
touches the roller
⑩
. Then tighten the trimming cam fixing screw
⑤
.
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 nut
①
with a
wrench box and then loosen the tension adjusting screw
②
.
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
nut
①
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
Содержание KM-2300
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