Troubleshooting a perske router spindle
Troubleshooting a perske router spindle
(OP)
Hi All,
I have a perske router spindle:
vs60.11.2
5.5hp
220v 13.3A
17550rpm 300Hz
I had a current overload error on the VFD, so i took the motor apart and cleaned it out,
ran an insulation test on winding to ground and winding to winding also measured the
resistance on the windings to see if they were consistent. Every measurement i took checked out fine so i got new bearings and assembled the motor.
The same overload error occurred. running the motor at 6Hz, it ran but drew a current of 14A.
ran insulation test again with no faults, had the dc test voltage at 1000v. any pointers on how to proceed with this motor?
Thanks,
Frank
I have a perske router spindle:
vs60.11.2
5.5hp
220v 13.3A
17550rpm 300Hz
I had a current overload error on the VFD, so i took the motor apart and cleaned it out,
ran an insulation test on winding to ground and winding to winding also measured the
resistance on the windings to see if they were consistent. Every measurement i took checked out fine so i got new bearings and assembled the motor.
The same overload error occurred. running the motor at 6Hz, it ran but drew a current of 14A.
ran insulation test again with no faults, had the dc test voltage at 1000v. any pointers on how to proceed with this motor?
Thanks,
Frank





RE: Troubleshooting a perske router spindle
If the motor measures good, then the drive may be at fault. It's an unusual drive (commonplace, but still 'different' to the majority) and without some reasonable test gear you'll probably struggle to make much progress.
Do you have a standard VFD of, say, a couple of kW available for testing purposes? You could run the spindle motor at reduced speed and frequency from a commodity drive and would perhaps isolate the problem to either the drive or the motor. You will need to adjust some of the test drive to some non-standard settings to match the high speed motor.
RE: Troubleshooting a perske router spindle
I find with machine tools it's just about %50 of the time the VFD and %50 the motor. So it's very possibly the VFD.
Keith Cress
kcress - http://www.flaminsystems.com
RE: Troubleshooting a perske router spindle
The rotor's not in mint condition, but i've never seen rotors causing behaviour like this.
RE: Troubleshooting a perske router spindle
In their default state most drives - other than exotic stuff like dedicated spindle drives - will reach full output volts at either 50Hz or 60Hz depending on where you are in the world. Your motor is expecting full volts at 300Hz. If this config error exists then the net effect would be that the motor is getting either 5x or 6x the voltage it is designed at those low frequencies, which would explain the overcurrent.
RE: Troubleshooting a perske router spindle
RE: Troubleshooting a perske router spindle
Most all motors i deal with are 50hz 220v, so the base frequency didn't cross my mind(though admittedly it should have after the initial problems), with the new inverter(correctly set up) and bearings this motor is now running smooth and silent.
Frank
RE: Troubleshooting a perske router spindle