− 89 −
1) The clearance between needle thread trimming
knife ❷ and the needle is approximately 0.6 to 0.75
mm.
Loosen setscrew ❶ and move needle thread triming
knife ❷ to adjust the clearance.
2) To adjust the height of needle thread trimming knife
❷, loosen setscrew ❼ and move needle thread
trimming knife adjusting base ❸ up or down to
adjust the clearance between the needle thread
trimming knife and spreader, right ❺ to 0.1 to 0.15
mm.
At this time, make sure that clearance A is provided
between the needle thread trimming knife and the
throat plate.
When needle thread trimming knife ❷ comes
in contact with spreader, right ❺, breakage
of components will be caused.
3) The operating position of needle thread trimming
knife ❷ is the position where needle thread trim-
ming knife ❷ juts out from throat plate ❽ by 1.2
to 1.5 mm when needle thread trimming actuating
arm ❻ is moved counterclockwise until stopper
B ❾ of the needle thread trimming actuating arm
comes in contact with the needle thread trimming
knife actuating arm ❻.
In the case adjustment is required, loosen needle
thread trimming knife actuating arm stopper B ❾,
and then adjust the screw jutting amount.
4) Adjust the overlapping amount between the bobbin
thread presser and the front end section of the
throat plate to 0 to 0.2 mm.
Adjust the overlapping amount by loosening nut ❹
and changing the jutting amount of the screw.
10-11. Installing position of the needle thread trimming knife
0.6 to 0.75 mm
0 to 0.2 mm
1.2 to 1.5 mm
WARNING :
1. Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start
of the sewing machine.
2. To avoid unexpected personal injuries, be sure to keep away from the looper thread trimming
knife during work.
0.6 to 0.75 mm
0.1 to 0.15 mm
❽
❷
❾
❸
❼
❻
❹
A
❶
❷
❽❺
❸
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