Originally Posted by
S61TrunkMonkey
Update, I almost bought a new breakout board, but I thought of a test I could perform. The problem is the VFD / Spindle. the program will always start right, and always cut at the programed Z depth when the spndle is not running and the VFD is unplugged. This puzzles me because nothing has changed in months with this machine. I also have the VFD about a foot and a half away from my conrtol cabinet running on a different circuit from what the control panel uses. Anyways, I have ordered EMI filters and a better quality sheilded wire. I will add to my control panel later when the Amazon fairy arrives. I hope my little blog here will help someone.
When your machine is doing something weird, randonly with no patteren, run your mill with the spindle and vdf unplugged, floating over your table at a safe z height and see if you can reproduce the faults.