JUKI MB-1373 Engineer's Manual page 21

Adjustment Procedure
1. Adjust so that stop-motion hook
disc at the stop-motion position.
2. To adjust longitudinal feed cam
cam with pointer
cam. Align the engraved dot on lateral feed cam
longitudinal feed cam
3. After the adjustment, turn the driving pulley by hand and confirm
that the button clamp jaw lever stops at a distance of about 13 mm
between the top of the needle and the top surface of the throat
plate when the needle bar descends by means of a crosswise feed.
4. When the thread-fray prevention ON/OFF changeover mechanism
needs to be turned off for attaching labels, etc., it is necessary to
adjust the origin of the lateral feed cam
dot but to the engraved marker line.
Adjustment Procedure
1. Adjust so that stop-motion hook
motion disc at the stop-motion position.
2. Make adjustments by loosening screw
rod.
comes in contact with stop-motion
, align the engraved dot on the
fixed on the bed and tighten the setscrew in the
and tighten the setscrew in the cam.
not to the engraved marker
comes in contact with stop-
of the lifting plate guide
o If the lengthwise feed cam
with the dot on o If the engraved dot is not correctly
o If the position of the engraved dot
o If lifting hook
o If button clamp lifting plate
– 17 –
Results of Improper Adjustment
crosswise feed cam
rectly positioned, the needle can
sway.
positioned, the needle entry point
can vary and needle hardly enters
the center of the holes in the
button.
→ The thread can frequently fray.
deviates in the advancing direction
of the cam, the needle can sway
when it comes off the fabric.
If the position of the engraved dot
deviates in the opposite direction
of the cam, the button clamp jaw
lever can sometimes move until
the needle penetrates the fabric.
Results of Improper Adjustment
juts out, the but-
ton clamp will not lift at the time of
stop-motion.
out, button clamp lifting plate
may come into contact with the
button clamp forked rod during
startup, resulting in production of
abnormal noise.
and
are incor-
juts