Pressing "Feed Hold" and jogging away to clear chips, I press the "Cycle Start" to resume and noticed the Z axis starts creeping (0.001" every 2 or 3 seconds) back to home position. No issues with the X or Y axis. I've duplicated this issue several times to verify. As long as I don't use Feed Hold everything works ok. Using Gerry's 2010 screenset, licensed V.066, Gecko 540 driver. Any suggestions?