JUKI AMB-289 Engineer's Manual page 23

Adjustment Procedures
1. Loosen four setscrews 1, lightly press Y bottom feed motor
2 in the direction of arrow mark, and tighten four setscrews
1 again, while moving the top feed unit to and fro and
confirming that it smoothly moves within the movable range.
2. Apply grease (green : grease tube) to lengthwise feed gear
section 3.
3. Turn ON the power, and confirm whether there is any
looseness after the origin retrieval.
4. For adjusting the origin position, refer to "2) Adjusting the
bottom feed origin sensor" of "(16) Adjusting the respective
sensors".
Results of improper Adjustment
™ When pressing is insufficient,
− 19 −
backlash becomes large, and
pressing is excessive, torque
becomes large. Then step-out
may be caused.