Hi,

I checked all the fuses, and they are ok. After analyzing the AC spindle drive faults, I have one bulb lit in the number two spot. The text for this says "Speed deviates from commanded speed". I read the list of alarms page, and the causes include Overload, transistor module is damaged, loose connections, error with speed feedback signal and blown fuse.

A friend of mine who used to work with GE controllers thinks the frequency and voltage from the drive needs to be adjusted, using the pots on the board. I don't have that manual, so I wanted to ask what the hertz and frequency need to be, so I can adjust that using the pots on the board.
My input voltage checks at 430V 3-phase, and the out voltage from the transformer is 215V 3-phase, which I didn't worry about because it is within 10 percent.
Also, is there a good way to check the transistor module? Any suggestions are appreciated.

Thanks,
Bill Gillen