On 09/16/2011 10:47 AM, Bruce Bergman wrote:
Looks like the practical solution to your problem is to get Grizzly to un-discontinue the G0521. If it is suitable, push it to your customers and get their sales up to where they want to keep making them.

Might even come up with a "referral system" so they can see sales, or stock a few yourself so you can send the press and tooling already mated, tested, and ready to rock and roll. Yes, you'd have to mark it up a bit - probably still less than the Ellis.

And why the heck are they suggesting a static phase converter for it? (Re the Skateboard Shop without 3-Ph.) That might be half the problem, they are getting warranty returns/repairs on them from plug reversing on an inadequate power source. Gotta use either real 3-Ph or a rotary phase converter to drive a heavily loaded motor like that, and plug reversing = heavy duty.

You'll drive a static converter nuts with it trying to drop the start capacitors in and out constantly, and the caps and the potential relay will die early deaths - then take out the motor if the operator doesn't recognize the symptoms of a failed converter.
If the reversal is quick enough, a VFD might be made to do something
close to plug reversal with a single-phase supply.

Jon