i have a partner 7, just got back a new motor for z axis, new amplifier, computer back from milltronics, every time i go to reset the drives, the motor spins, which it shouldnt, and get a following error.

Been chasing this problem for a year, need to get the machine running.

Also need a ball screw for a partner 1, both machines are 1995 years.

Thanks

A 1995 Partner 7? Was the control updated?

If it has the original SEM motors with the Tach built in, you should check the cabling to make sure the tach is connected to the control. Since it was recently rebuilt, there could be a slight chance the tach wires were swapped internally or not reconnected properly externally.

DC

I have Parker motors, (CSM) and Servo Dynamics amps.

The control is original, Milltronics when thru the computer to make sure nothing was wrong there. Servo Dynamics when thru the amps, the problem is the same even if I switch boards. I really think it in the wiring, but I dont know which wires control the error I am getting.

Parker tried 2 different alignments thinking Milltronics does something special to make them propriitary motors, but been thru that already.

My motor will be back again Monday and would like to finish this an get it running. My partner 1 runs 14 hours a day.

Thanks for the reply

I was thinking Centurion 7 not Partner 7 Oops......my mistake. More like a Centurion 1, 5 or 6?

I am not familiar with those motors or amps, but if DC, they should have a tach feedback and encoder. AC motors and drives do not. Seems a bit old for AC servos. Shouldn't be too hard to discern what wires groups go to each system within the motor and ring out the cable for continuity back to the control.

The Z cable is the least problematic since it just sits there without flexing. Although if the cable casings get brittle and crack, I suppose there could be an issue with shorting something to ground or cross connected. So check for shorts between wires and grounds.

DC

IF YOU HAVE A PARTNER MACHINING CENTER (ABOUT 1995) WIRING TO HOMING SWITCHES HAVE INSULATION THAT WILL DISSOLVE ; SHORTS OUT SWITCH SIGNAL,WILL AUTOMATICALY FEED WRONG DIRECTION UNTIL IT HITS LIMIT SWITCH. ALSO ENCODERS ARE NOT WELL SEALED, TAKE COVER OFF AND CAREFULLY CLEAN GLASS. (ONE WAY TO CHECK ENCODER UNHOOK FROM BALL SCREW, TURN ENCODER SHAFT MOTOR SHOULD FOLLOW.)