JUKI MEB-3200 Engineer's Manual page 11

Adjustment Procedures
™ Make sure that the clearance and timing between the needle
and the looper are equal at the time of occurrence of stitch
skipping and disassembling/assembling the needle bar.
If they are not equal, perform the adjustment described below.
1. Loosen three setscrews 1 in the needle bar cover and remove
the needle bar cover.
2. Turn the hand pulley to align the left looper with the center of
the needle.
3. Turning the looper bracket by hand, check the figure on the left
side (4 places).
4. Loosen three setscrews 3 in needle bar upper metal ring holder
2 and move needle bar 4 back and forth, and left to right to
adjust so that the clearance and timing should be equal.
Results of Improper Adjustment
™ Stitch skipping occurs at parallel
section and eyelet section at the
time of going and back of the
looper.
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