[frostheave]

Hi All,

Well, this is my first real post after many years of lurking and learning.
This is such an awesome site! Hopefully in the future I can actually contribute,
but for now here is my question. If anyone has input, I would greatly
appreciate it.

I purchased a new Optimum BF30 and from day 1 the gearbox noise has
really bothered me. I have a video posted here (Turn Up Your Volume):

[ame="http://www.youtube.com/watch?v=tPkAMdzAwuc"]BF30 Gearbox Noise[/ame]

The Optimum Rep I spoke to said the noise is at least partially due to an
inferior motor driver design which causes motor cogging and resonance.
I asked if it would be worth trying a different motor driver and he thought
it would but could not recommend a replacement.

Now to my question. The Rep said the BF30 has a DC motor but I am not
sure he is correct. Below is the wiring diagram and motor nameplate.











It looks to me like this is a 3 phase AC motor, NOT a DC motor. What do
you guys think?

The reason I ask is I would like to get a VFD (If it is a 3 phase AC motor)
and see if that will quiet down the gearbox.

Thanks for your help!