We get a 146 z axis over travel alarm. It never happens when it's changing tools or near home. It happens with vibration or if we run in 100%. I can't remember when it happened at 50%.
Sometimes it happens 2-4 times a day....and won't happen again for a month or so. This is a VF3 2006. Haas service checked the plugs on the boards and said they didn't find anything loose. And they checked the operation of the z switch and everything checks fine?