Hello,
We have several of the Fanuc R-2000i Robots with the servogun module on them, but we are having an issue with one only one of them, it has been running fine for a while, and just started to have issues the last few weeks. Every couple days the robot crashes into the piece it is welding, and we find the closed position for the weld tips is off, (shows up to 12.5mm when just barely closed). All we have to do is reteach the closed position with new clean tips and it takes care of the problem. We have watched the tip dress program and it updates just fine and it also clears itself out when a tip is changed and then restarts on the first tip dress. We changed out the servo gun thinking it was possible slipping and not reading, but that doesn't seem to have made a difference. Any ideas as to what can be causing this. The yearly PM was just completed that did the grease and battery change, if those details help at all. THank you.