Hi all, I have a stb4100 mach 3 USB moard and I just got my Huanyang vfd spindle hooked up and running through the board and MAch 3. My issue is what are the correct settings in mach 3 spindle setup to accurately control the speed?
When I hit M3 to turn on the spindle and enter S5000 for 5000rpms, my VFD readout shows 14,000 + rpms. Shouldn't the two match? I have my spindle pulley set at a max of 24000rpms and ratio set at 1. See a screen shot of my mach spindle setup settings below. Does anyone know what I need to change to get these readouts matching?

Thank you