Does the spindle drive accept PWM directly? If not you need a PWM to analogue or whatever type of contol the drive has, converter.
If the drive manuf. are not responding, did you try the MTB?
As a last resort you may have to check that Mach is outputting a PWM signal and reverse engineer the type of control the Sp drive has.
The Mach site itself should also supply a lot of info in the tutorials.
Al.
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.