Melco EMT 10T Specifications download pdf (Page 49)

6. While slowly rotating the head, check that the green LED on the front or the

innermost LED on the CPU blinks once each revolution (this is the "index" or

"headup" mark).

7. If there is no evidence of the LED blinking, inspect the electrical connectors

(encoder cable plug and encoder body) for loose wires, loose fits, and any visual

damage. Clean connections and/or replace components as necessary.

8. Rotate the head again to check for the blinking LED. If the "test" repeatedly fails

refer to the following installation procedure for a new Z shaft encoder.

Installation

The Melco EMT 10T Embroidery Peripheral uses a shaft encoder on the rear of the

head to provide the information required by the CPU.

Note: This procedure leads to a calibration which requires the use of a special

service tool: the Melco 10 needle head up fixture (p/n 995673-01).

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 cover from the rear of the embroidery head.

3. Disconnect the encoder cable from the current shaft encoder (see Figure 3-3).

4. Loosen the two coupler cap head screws (A) that secure the coupling to the Z

encoder shaft (see Figure 3-3).

5. Loosen and unthread the jam nut on the encoder shaft.

6. Pull the encoder out of the shaft coupling and encoder mount. Capture the jam

nut and washer as the encoder shaft is removed.

7. Insert the new encoder/shaft into the hole of the encoder mount, place the

washer and then the jam nut onto the encoder shaft as you insert the shaft

through the mounting plate.

8. Insert the encoder shaft into the shaft coupling.

9. Tighten the jam nut, and then snug the coupling cap head screws onto the

encoder shaft.

Installation 3 - 5

110291-01, Rev D 3. Embroidery Head Maintenance

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Melco EMT 10T Specifications Page 49