I'm finally getting the last bits of my Boss 5 retrofit up and running. So far the only thing that's not working/making sense is the spindle control. I can't seem to get any variable voltage out of the CNC4PC C11G Analog terminals. I have a 13.56V external source (12V wall wart, 900ma) connected to the external power source terminals next to the analog terminals. I'm running Mach for the control program. Spindle is enabled per Arturo's docs, step set to pin 14, Steps per to 2000 and velocity to 1500. All I ever get for a voltage is 0.699V. I've tried active low, active high. No luck. It's probably something basic I'm missing. Any suggestions are very welcome.