Quote Originally Posted by CS900 View Post
Wow, lots of action in here. Thanks guys!

Power supply is at 48VDC. I'll check tonight to see if voltage drops under load. It's a toroidal power supply (part number: KL-4820)

Yes I believe it does. PPR is set to 4000 from the factory.
It looks like your power supply is good - more than enough amperage. You're running in the right RPM range... I'm kind of at a loss.

Might try swapping them out with your smaller ones and see how it runs.

I'd contact the supplier for support in this case