Ok i tried the 5v check you mentioned Andy, and i think i found the problem. pin 1 is only showing 0.1vdc wether the spindle is on or off and wether i set the rpm to 100 or 2500 its always 0.1v. i put the meter on one of the home switch inputs and it was showing 5.1V or 0v depending wether i had the switch pressed or not, so im thinking pin 1 is nackerd. im gana try soldering the spindle board to another output pin and see if that sorts it.


regards
Simon