1994 6030 10,000 rpm 15 hp
When I command 1000rpm for example and turn the spindle speed pot to 100%, the spindle is actually turning at about 600 rpm. It doesn't hit 1000 rpm until I turn the knob to about 175%, then the sceen displays the C axis is at 100%.
I've replaced the pot. The voltage accross the pot is 5V and when set to 100% the voltage at the centre white wire is 2.54 volts. I've verified this voltage to the spindle controller card. I think I have a spindle conntroller card problem, but I would like this verified before ordering a new part.