Hi Keith,

I assume you are using a good quality multimeter to measure the 10V voltage. My Maplin specials do not average enough to give a good measurement. They always give a peak measurement.

Have you gone through the spindle calibration so that Mach3 can write the linearity data?

have a look at this one too:

http://www.machsupport.com/forum/ind...c,15457.0.html