Specifications

12. Position the new motor slightly through the Y shaft Bearing support bracket and
connect the Y motor encoder harness as noted in the previous step and below.
NOTE: When viewing from the rear of the motor and the encoder pins facing
upward, the number 1 pin is to the right.
The encoder harness connector pin number 2 does not have a wire,
therefore, the harness connector attaches to the encoder pins with the
open wire space being the second one from the right.
13. Install a couple of cable ties to hold the encoder harness together with the
motor power harness.
14. Orient the motor bracket with the belt tensioning screw hole and tab toward the
bottom, then reattach the motor bracket to the motor with the four socket
head cap screws and associated hardware. Tighten the screws securely.
15. Place the motor pulley onto the shaft with the hub toward the motor and in
approximately the same position it was on the old motor shaft.
16. Attach the motor bracket (with motor) to the Y shaft Bearing support bracket
with the two socket head cap screws. Leave the screws slightly loose.
17. Reattach the in-line connector for the motor power harness.
18. Replace the belt onto the motor and Y shaft pulleys and reinstall the belt
tensioning socket head cap screw through the hole in the motor bracket
tensioning tab into the threaded hole in the tensioning tab of the Y shaft
bearing support bracket.
19. Slowly tighten the belt tensioning socket head cap screw to take up the slack in
the Y motor drive belt tension (DO NOT OVER TENSION THE BELT).
20. Refer to the Y motor belt tensioning procedure to adjust the belt tension.
Y Motor Belt
The process for replacing this belt requires major disassembly of the Y drive system.
It is not recommended without training on the adjustments required in setting the X
beam parallelism with the Y carriages.
Belt Tension Adjustment
To adjust the Y motor belt tension after replacing the belt or a Y drive motor, refer
to the following procedure:
NOTE: This procedure requires a specific Melco force gauge (p/n 995585-01), for
proper belt adjustment after replacing the motor.
Y Motor Belt 2 - 23
110291-01, Rev D 2. Service Maintenance (except head and trimmer)