I am having a similar problem so I have been reading the comments for answers. My issue is a little different. I can get a voltage change when I jog the X. Connected to Step, I get a voltage change from .072 to .095. I don't think my breakout board can read such small voltage. I have checked TestDriver, address, offline button, reset and none of it seems to change that I really am not getting a reading worth mentioning. Any additional help would be appreciated.