My hobby cnc pro controller board quit working, that i never fully had running. I have had it a while so can't turn in, no support from dave on his forum. So i am just going to have to get something else. I just saw the thing about optimal voltage for steppers. Not sure if my math is correct.

I have keling 425oz motors. 8 wire so it can be bi or uni. If bi parallel needs 4.17v, 2.8A, 1.8ohms, 6.8 ind = 425oz
If uni needs 6v, 2A, 3ohms, 6.8ind = 305oz
According to the math i need 90+ volts feeding the controller because of the inductance...?

I don't have much money right now, i am just trying to get my joes 2008 up and running. I can upgrade controllers in 6 months but don't want something that will be missing a ton of steps, but is still reasonable in price. The voltage for the steppers is throwing me off. I was looking at aquick cnc, TB6600 or TB6560, or hobbycnc pro...again..sigh. I will buy geckos in time but not right now. I still need to buy bits, and software as well. Any recommendations?

Thanks,

Jason