Specifications

8. Put the new motor in place in the support bracket and slip the drive belt over the
pulley. Insure the other end of the drive belt remains on the pulley associated
with the z drive mechanism.
9. With the existing hardware, attach the motor to the bracket, but DO NOT
tighten the four socket head cap screws at this time.
10. Remove the motor pulley set screws and apply Loctite 222 or equivalent screw
adhesive, then reinstall the set screws.
11. Position the motor pulley on the motor shaft so the belt will ride squarely on
both pulleys and that the belt will not ride up on the flanges of either pulley.
12. Insure the set screws are in line with the flats of the motor shaft and tighten the
motor pulley set screws.
13. Refer to the Z Motor Belt Tensioning procedure in Section 2 of this manual to
adjust the belt tension as you secure the motor to the support bracket.
Z Shaft Encoder Installation
The Melco EMC 10/4 Embroidery Peripheral uses a shaft encoder on the end of the
Z drive shaft to the left of embroidery head #4. It’s function is to provide the
information required by the CPU.
"FACTORY SERVICE ADVISED"
CAUTION! If the Z shaft encoder is replaced, DO NOT OPERATE THE EMBROIDERY
PERIPHERAL until the new Z shaft encoder is properly calibrated!
To replace the encoder follow these steps:
1. Turn the machine OFF, then disconnect the power from the power source.
2. Remove the #4 rear cover, then the #5 rear cover (refer to the procedure for
cover removal if information is needed).
3. Disconnect the Z encoder harness from the z encoder.
4. Using proper antistatic precautions, disconnect the encoder cable from the CPU
board.
5. Loosen the two coupler socket head cap screws that secure the coupling to the Z
encoder shaft (see Figure 3-17).
6. Loosen and unthread the jam nut on the encoder shaft.
7. Pull the encoder out of the shaft coupling and encoder mount. Capture the jam
nut and washer as the encoder shaft is removed.
3 - 20 Head Section
EMC 10/4 Technical Manual Melco Embroidery Systems