JUKI AMS-221EN Series Engineer's Manual page 67

Adjustment Procedures
1. Start the test mode I06.
2. When the pedal is trodden on, the feed moves to the mechanical
origin and then stops.
3. Lower the needle and check the front-rear displacement from the
engraved marking of the origin.
4. When the engraved marking of the origin is found to be displaced in
Direction A from the needle tip, adjust the sensor mounting plate
in Direction C. (Loosen the setscrews
after adjustments.)
5. When the engraved marking of the origin is found to be displaced in
Direction B from the needle tip, adjust the sensor mounting plate
in Direction D. (Loosen the setscrews
after adjustments.)
and fix the setscrews
and fix the setscrews
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Results of Improper Adjustment