JUKI MO-6700D Series Manual page 31

Adjustment Procedure
1) Remove the upper cover, loosen setscrew
arm , and turn upper knife shaft
top surface of the throat plate to 34 mm.
(Caution) Be sure to fully tighten the setscrew since upper knife
shaft is subjected to high load.
Adjustment Procedure
1
1) Lower knife
Adjust the vertical position of the lower knife by screw
2
blade top aligns with the top surface of the throat plate.
Tighten screw after bringing the upper knife to its lowest position
of its stroke.
1
2) Upper knife
Adjust the position of the upper knife by screw
ment with the lower knife is 0.5 to 1 mm when the upper knife is in the
lowest position of its stroke.
(Caution) Adjust the lateral position of the lower knife by screw
Adjust the lateral position of the upper knife by screw
After performing adjustment, be sure to fix the knife. Oth-
erwise, the durability of the knife will be affected.
1
3) Overedging width
Adjust the overedging width in the following way :
Laterally position the upper knife before loosening screw
Tighten screw when the upper knife has settled by itself under the
pressure applied by the spring. Repeat this adjustment procedure to
obtain desired overedging width.
in upper knife driving
to adjust the position from the
so that the
so that the engage-
.
– 27 –
Results of Improper Adjustment
o Improperly positioned upper
knife arm shaft will come in
contact with the frame.
If it is moved with the position of
the upper knife unchanged,
proper engagement of the knives
will be disturbed, prohibiting
sharp cutting of the knives.
Results of Improper Adjustment
o The lower knife, if positioned too
high, will catch materials or
cause no contact of the presser
foot with the throat plate top sur-
face.
o If the lower knife is positioned too
low, the cutting width will be
changed or materials will be
caught by the lower knife.
o The upper knife, if positioned too
.
high, will fail to cut materials.
.
o Failure of cutting or abnormal
wear on the knives will result
unless the lower knife is laterally
positioned and fixed at a position
where it has settled by itself un-
der the upper knife spring.