Hi guys, I've got my belt drive setup and things very smooth and quiet at 60Hz using the AC bearings.
I'd like to get a few more RPMs out of it and push the VFD higher.
If I run at 80Hz things are still relatively quiet and vibration free, but I get into trouble when I try to stop the spindle.
The Mitsubishi FR-D700 shows an error indicating "Regenerative overvoltage trip during deceleration or stop". The spindle then crawls to a stop and I must press reset on the VFD to get control back.
This happens about 20% of the time.
What is the remedy for this?
The only change I've made to the VFD settings from the factory are to max frequency output with potientiometer at 5v (changed from 60 to 80). I left the base frequency settings all at 60Hz.
Do I need to make any further changes elsewhere in the VFD config?
Or should I slow the deceleration in Mach3 using motor tuning to slow the accel/decel of the spindle?
thanks in advance