JUKI AMS-221EN Series Engineer's Manual page 33

Adjustment Procedures
* Turn ON the power once, and turn OFF the power again after
making the intermediate presser in the lowered state.
1. Bring the needle bar
bar connection screw
needle bar with the bottom end of the needle bar lower bushing
2. Change the adjusting position according to needle sizes.
(Caution) Be sure that torque is even after adjustment.
At that time, check the clearance toward the wiper. If
the clearance seems to be narrow, readjust this sec-
tion.
down to the lowest position, loosen the needle
and align the upper engraved line
If adjustments are carried out with
the needle bar
o Feed timing causes mismatching
on the
.
o Interference occurs with the inner
o The needle interferes with the
o Clearance toward the intermediate
– 29 –
Results of Improper Adjustment
positioned too low:
and this can be a cause of needle
breakage.
hook while the needle is lowering
and this can be a cause of needle
blunt or breakage.
wiper and this can be a cause of
wiper or needle breakage. In
some cases, intermediate presser
step-out may occur.
presser is decreased and the
wiper becomes useless.