thanks for the info Irving.

There was considerable documentation on the GMFC web site for the MM2001 interface. However I didn't see anywhere if this was specifically for the stepper controller board that GMFC recomend. I was guessing that maybe it would work on the TB6560 board. I found one forum where someone with a TB6560 CNC, had used GMFC, but only to create the G-code for Mach3.