Hi Jeff,

What I don't have... is closed loop motion...
I'm guessing you haven't properly tuned the axes. The Feed Forward is probably outputting something to the DAC to give some motion. The Max Following Error is set to a huge value so there isn't any fault when the axis doesn't follow properly. I would remove the FF and use the Step Response Screen to set the feedback parameters such that the position follows the command with low error.

With a slaved pair of axes like this it is somewhat tricky to tune. I'd try very small moves (with the other axis disabled) first to obtain some reasonable tuning. Then set the same parameters for both axes and Slave them and Tune the Master Axis with the Slave following. Then reverse the Master/Slave roles to tune the other axis.