I just gotten one recently and while I am able to turn it on and off through mach3 I am having difficulty with controlling the spindle speed.
I am using gecko g540, ess from warp9 running with mach3.
So far one issue is no 10v output from pin 8 of g540 though the vfd does give 9.6v to pin 9 of the g540.
Has anyone sucessfully configured the fc300? 2.2kw water cooled