I am milling. But it doesn't seem to matter what I do, even with GO or G1 codes, it moves to the spot in jerks, not a nice smooth motion. It moves about 1/2 inch, then stops for a fraction of a second, then moves again about another 1/2 inch or so. I've varied the speed of anywhere from 1 to 50 and experience the same sympton. Changed jog size, jog on and off, all to no avail. It makes me believe it is inherent in either the program or Zenbot controller, but not sure. It doesn't seem to effect results, just looks funny. Carl