Cunter Knife; Pedal Pressure And Pedal Stroke - JUKI DDL-8700A-7 Instruction Manual

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.
a
C
b
c
1
a Moving knife b center of needle
c Standard : 4.0mm (DDL-8700aH-7: 4.5mm)

25. Pedal pressure and pedal stroke

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.
2
1
1
A
B
3
– 7 –
If the knfe does not cut thread sharply, mmedately
re-sharpen counter knfe 1 as llustrated n Fg. C
and re-nstall t properly.
) If the mountng poston of the counter knfe s
moved n drecton A from the standard mount-
ng poston, the thread length after thread trm-
mng wll be ncreased accordngly.
2) If the mountng poston s moved n drecton B ,
the thread length wll be decreased accordngly.
When sharpening again the knife blade,
extra special care must be taken on the
handling of the knife.
(1) adjusting the pressure required to de-
press the front part of the pedal
When the pedal pressure sprng 1 s hooked to
the lower sde, the pedal pressure wll decrease,
and when hooked to the upper sde, the pedal
pressure wll ncrease.
(2) adjusting the pressure required to de-
press the back part of the pedal
The pressure ncreases as you turn reverse de-
pressng regulator screw 2 n, and decreases as
you turn the screw out.
(3) adjusting the pedal stroke
The pedal stroke decreases when you nsert con-
nectng rod 3 nto the left hole.