Old electrician guy trying to help a friend out with his Haas Mill.

The fault light comes on the drive as soon as you power up the machine and unable to start the motor. We checked the input voltage and the Regen Resistor, no problems found. I assume you must be able to start the drive to check 325vdc to servos. Going to disconnect the output to the motor tonight to see if drive fault goes away.

Operator was running a part and program that he has been running for a long time with no changes. He noticed the Regen resistor glowing red and then the drive failure came on. Drive will not run now.

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