In the AMAYA the color change is controlled through the use of an encoder, a stepper motor, the controller chip on the Main PCB and the AMAYA OS. The AMAYA OS will usually give an indication of what the actual failure is. The encoder and the color send a signal through the harness to the Main PCB and the status is reported by the firmware to the AMAYA OS, and then displayed on the computer screen.
|
Step |
Procedure |
Condition |
Solution/Step |
|
1 |
Check for an obstruction blocking movement of the needlecase assembly |
Obstruction found |
Clear it |
|
No problems |
Go to Step 2 |
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|
2 |
Check for binding on the color change spindle
|
Bind found |
Lubricate the color change spindle |
|
No bind found |
Go to Step 3 |
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|
3 |
Turn the machine off and turn it back on again. Reboot the computer and reload the AMAYA OS. |
Color change works |
Probably corruption of data in the RAM |
|
Color change fails |
Go to Step 4 |
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|
4 |
Conduct an optical sensor test on both the needlecase sensor (installed in the needlecase) and the color change home sensor (installed in the lower arm between the reciprocator and presser foot shafts). |
Either sensor bad |
Replace optical switch assembly |
|
Both sensors good |
Go to Step 5 |
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|
5 |
Measure the resistance of the stepper motor (Measure the resistance between the phase wires. Disregard the ground (green) wires.) |
Resistance < than 7 ohms |
Short in the stepper motor, replace it. |
|
Resistance > 10 ohms |
Open in the stepper motor, replace it. |
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Resistance between 7 and 10 ohms |
Go to Step 6 |
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6 |
Above steps failed to find problem. |
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Contact Melco Technical Support for assistance. |
