Having problems with turret initialization...
We have a J&L lathe (circa 1984), single side turret, UPI with AB 8200 NCU.
The issue is this... when initializing the turret will unclamp, begin to move and then quit. There are no fault messages, EVERYTHING appears normal. The servo drive can be operated manually by using a 9 volt battery so the drive is fine. Once it quits no more control of the turret is possible until a complete power down at main disconnect as the upi remains powered up with control off. Seems to be servo board related... there is +11.9/-11.9 coming from the servo board to drive. The resolver has been setup for this board using scope. Pretty sure this board is bad. Any ideas on what could be bad on this board if this is the problem?