Have owned a KX3 for some years now and I'm having no spindle rotation for the second occasion. The provblem was sorted by the late John Stevenson and at that time I replaced the spindle motor control board. The problem has happened again and going through the same test proceedures as before I find that I am not able to get anywhere 10 volts out of the breakout board. I have tried changing step pulses, pulleys and have the voltage adjuster turnned up full and can only get 4 volts. Is my problem in the breakout board this time or is it the motor control board again. X,Y & Z are working normally.