[crane550]

Hey,

I just purchased a Hitachi VFD to go with my 3kw Chinese spindle. I went with the 10HP model which can run on 1 or 3 phase. The spindle is de-rated 50% since I am running a 4.3ish HP motor on single phase input.

Anyways, I set all my settings (well, maybe not all of them) and can get it to spin if I give it little help to get started. I can get it to spin either way. Without giving it a push start it will just sit and hum. Does anyone know what is going on? Hours of google turns up nothing. Any help would be greatly appreciated.

Alex

[BanduraMaker]

Post your settings for the VFD.

How fast does it spin?

The key parameters to look at are:

Base Frequency - probably either 300 or 400Hz basically your max speed
Run Frequency - set to your max for testing
Max Current - set to your spindles max current - a little safety buffer
Number of poles - again, match your spindle.
Ramp time - 5 seconds ought to do it.

As a total guess, your base and run frequencies might be set so low that your spindle won't turn.