Quote Originally Posted by GordonB View Post
For stepper drivers I was considering these, partly for cost, partly because they have decent reviews, and they will easily cope with 36V 2.8A/phase supply to the steppers, which is what they are rated at.
Complete and utter junk I wouldn't use them on a printer let alone a CNC machine. If you run them at 36v, even thou rated at 42V they won't last long.
If you buy those you will regret it take my word for it. Even if they stay alive long enough the difference is motor smoothness and performance alone is worth paying the extra.

Don't make the classic mistake made by many new CNC users and buy cheap electronics, they are cheap for a reason none of which make for a good or reliable machine.

Regards the speed controller then you will need something that can accept 0-5 or 0-10v analog input for the speed reference because I don't think the Axbb provides a PWM output, I could be wrong so ask CNC drive first or go to there forum and ask.

You can also get BDC controllers that have stand-alone PWM built into them and control the spindle speed with a Pot.!

To be honest I don't do a lot with BDC controllers as Brushed spindle motors are not common on CNC machines these days.