JUKI DDL-8700A-7 - Cunter Knife Adjustment; Pedal Pressure and Stroke

– 17 –
If the knife does not cut thread sharply, immediately
re-sharpen counter knife
1
as illustrated in Fig.
C
and re-
install it properly.
1) If the mounting position of the counter knife is
moved in direction
A
from the standard mount-
ing position, the thread length after thread trim-
ming will be increased accordingly.
2) If the mounting position is moved in direction
B
,
the thread length will be decreased accordingly.
When sharpening again the knife blade,
extra special care must be taken on the
handling of the knife.
a
Moving knife
b
Center of needle
c
Standard : 4.0mm (DDL-8700AH-7: 4.5mm)
1
A
B
C
a
1
b
c
(1) Adjusting the pressure required to de-
press the front part of the pedal
When the pedal pressure spring
1
is hooked to
the lower side, the pedal pressure will decrease,
and when hooked to the upper side, the pedal
pressure will increase.
(2) Adjusting the pressure required to de-
press the back part of the pedal
The pressure increases as you turn reverse de-
pressing regulator screw
2
in, and decreases as
you turn the screw out.
(3) Adjusting the pedal stroke
The pedal stroke decreases when you insert con-
necting rod
3
into the left hole.
1
2
3
25. Pedal pressure and pedal stroke
24. Cunter 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.