I have a 4'x4' gantry, 220VAC spindle at 2.2KW with VFD, 4 Gecko 203V's, 60VDC 10 amp drives power, Nema 23 400 oz/in steppers @ 3mh. I have a 10:1 gear reduction for the Z axis. And run the Y with one motor slaved to the other.
The controller is an Acorn CNC, and I use Vectric Desktop.
Anyone else have a similar set up?