Hi,guys I have a 1992 bridgeport vmc 1000/20 with a heidenhain tnc 2500 control. The servos are fanuc a06b-6050-h402 for all three axis.The problem i am having is when i try to home the machine ,Iget an gross positioning error z-d . Ihad fanuc techs here to look at servo unit , They sent it out to be looked at and when it returned i still have same problem. When i do voltage checks from the drive transformer to the drive ,one of the legs is low with the drive disconnected the voltage is equal. I still think the drive has a problem but not getting anywhere with fanuc . Any other possibilty on what the problem could be. Iam at witts end with this problem machine down for a month now. thanks shbach
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