Hi, first post. I have a Fanuc Robodrill 20k mill with a 16i-MB control. For the last 5 weeks, I've been getting amp readings of 15 to 39 amps on any of the 3 power legs. I was converting to 3 phase using a digital phase converter but Fanuc, after replacing the power supply decided that the electronics in the converter conflicted with the power supply, so, till that was replaced, they could not help further. So, I installed a rotary, identical to a unit being used by another local shop, with an identical machine. Still have high amps. Fanuc came back and again replaced the power supply and spindle drive, but, the high amps are present. Fanuc basicly has given up. Robodrill service has as well tried to troubleshoot to find the source of the amp draw with no luck.
This machine may register high amps as soon as the control is turned on and e-stop released. Amps may drop to normal (2.3) when the spindle is turned on, but return when reset, or M05 is commanded. I found this problem because wires were to hot to touch. The machine has yet to register a alarm. I'm wondering if anyone has ever encountered this problem. Everyone here is quite baffled.
Thanks, Ken