I have a cell with 2 Fanuc 120ib robots. They work with a mirrored program, so they typically are in sync with each other. Every weld that it does is right where I have the points touched up to except for 2. Two welds (they are mirrored welds so they are in the same spot just opposite each other) shift almost a quarter inch each time I run a cycle through it.
The problem is that its only the two welds that are doing it, all the other welds are staying were they are supposed to be.
I have checked to make sure the robot is bolted to the ground properly, i made sure the neck of the robot wasn't bent or misaligned, and I checked to make sure there was no extra lines of code in the program that would cause it to shift.
This just started a couple of days ago and I have absolutely no idea what is going on with it.
Any help at all would be much appreciated.
Thanks