I converted a Bridgeport j-head to cnc using servos and g320's, and a Kelling power supply. I originally started with stepper motors but had some issues loosing steps and decided to change to servos. Well my servo on the x axis will randomly move it's position. With no movemnet comanded and the motor sitting idle, it will randomly move .002-.010". i've even seen it jump .030" Last night i left the servos powered and the pc off to eliminate the pc, well i checked it this morning and x moved .084". This is not dithering or hunting, it just moves as if it was comanded. this can occur while running a program too which really creates problems. I even installed a 4' ground rod thru the concrete 2' away from the machine thinking that it was noise. tonight i disconected the step and direction wires from the drive to eliminate the break out board. I guess the next step is to eliminate the servo and encoder. Any one ever hear of this or have some suggestions?