Hi all,
I have some fanuc spot welding robot (R2000iC/210F) with R-30iB controller for spot welding application on car body . One of the robot sometimes ( once in a shift) spots get shifted in 3-5 mm in Y -ve direction . which is caught in inspection station. All other car bodies spot found ok in taught position. We have confirmed the part is not shifted itself as other 3 robots spots were in exact location. What can be the problem with the robot. Robot is new , operational for last 1 year only.
We have checked
1. Spot tool looseness at J6
2. Robot base bolt
All are OK.
Please suggest for anything to check.