I am a noob to CNC, but I am working hard at it.
I get the title overtravel message on my 2003 MB-20 mill running a Cent 6 controller. I've run some tests before and not recieved this. I brought in a new NC file to drill holes in some birch ply. It did well at first then it crashed the pointing tool into the part (indeed broke it). I figured I might be hitting the lower Z stop switch so I ran a dry run test with the quill lowered. It would instead rapid return to a higher and higher plunge start point at each hole...then the 403 alert (I get the alert before it is close enough to acually hit the Z overtravel switch).
I've carefully set and confirmed the g54 xy zero's and I physically touched-off the tool Z offsets. I am using FeatureCam for NC output, I looked at the code and there are no G92 calls. Also the numbers appear right for the Z heights for drilling and pointing. I look at the G92 settings in the MB20 nothing there. Perhaps it is an absolute vs relative thing.
I am befuddled... any thoughts would be appreciated.