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– 17 –
If the knife does not cut thread sharply, immediately
re-sharpen counter knife as illustrated in Fig. A
and re-install it properly.
1) If the mounting position of the counter knife is
moved in direction A from the standard mounting
position, the thread length after thread trimming
will be increased accordingly.
2) If the mounting position is moved in direction B,
the thread length will be decreased accordingly.
a
Moving knife
b
Center of needle
c
Standard : 4.0mm
A
B
Fig. A
a
b
c
(1) Adjusting the pressure required to
depress the front part of the pedal
1) This pressure can be changed by changing the
mounting position of pedaling pressure adjust
spring .
2) The pressure decreases when you hook the
spring on the left side.
3) The pressure increases when you hook the
spring on the right side.
(2) Adjusting the pressure required to
depress the back part of the pedal
1) This pressure can be adjusted using regulator
screw .
2) The pressure increases as you turn the regulator
screw in.
3) The pressure decreases as you turn the screw
out.
(3) Adjusting the pedal stroke
1) The pedal stroke increases when you insert
connecting rod into the right hole.
27. Pedal pressure and pedal stroke
26. Counter knife
WARNING :
Be sure to turn the power OFF before the following work in order to prevent personal injury due to
unintentional starting of the sewing machine.
WARNING :
Be sure to turn the power OFF before the following work in order to prevent personal injury due to
unintentional starting of the sewing machine.
When sharpening again the counter knife , extra special care must be taken on the handling of
the knife.
19


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