I am trying to use my cnc4pc c11 rev2 multifunction board to control my spindle rpm. The C11 has an analog out put that will put out 0-10v. This replaces the potentiometer on my spindle drive. I have every thing figured out except which pins are used. I am using Mach3 and need to know wich pins are used for step and direction in the spindle setup page of Mach3. Will some one please help.