Re: PWM not allowing max spindle speed
As I understand Mach3 was only designed for 0-5 volts as a PWM signal. Its origin was a parallel port and that was max voltage. To get the 0-10 volt true output you might need to supply more than 12 volts to the control board, because of the voltage drop in the circuits. PWM and 0-10 vdc are not really the same thing. So to get the true 0-10 vdc the VFD needs, the controller board your using needs to convert that 0-5 PWM signal to 0-10 vdc. I also have a Warp9 ESS and its fine.
Retired Master Electrician, HVAC/R Commercial. FLA Saturn 2 4x4 CNC Router Mach4 Kimber 1911 45ACP