Exactly MetLHead, like the signal for some reason shorts to ground and cannot source enough current (and thats a good thing) to keep the voltage up. I was under the impression that the signal coming from the rutex board was differential and not referenced to ground, but I do see a little GND logo by one of the command output terminals on the board.
I tried what you said and viola it seems to have corrected the problem. I'll have to do some more testing this afternoon and see how it works out. However it doesn't make any sense, I had the two command (x and z axii) signals wired exactly the same on the signal input side of the Westamp drives. I'm going to have trace back the original manufacturer's wiring I think they may have referenced the positive side of one of the dc power supplies to ground. I think the lathe was originally built in England, would they do something like this on purpose? |