Okay I'm stumped. I set up my X2 for the pwm spindle operation. I have it basically working but can't seem to vary the spindle speed. I can turn the spindle on and off with either the button on about all screens, or typing M03 M05 etc. But when I do an SXXXX it has no effect and none of the arrows or fields you would expect to change the speed seem to have any effect. Anybody have any idea what I'm doing wrong?