Hi Tom,

Retested spindle input wire to Kanalog ground through meter and 120ohm resistor (closest I have to 100ohm). Checked 29mV static, then 14mV when jogged. Same results regardless of jog direction. Spindle at rest, then rotated CW at 4.5 RPM, regardless of jog direction.

Please reread my post about the 70 mV change. Maybe I was not clear enough. The 70mV change was with DAC=100, then jogging.
Thanks