Fanuc 12LiC Welding Robot USER FRAMES

Hello,

We are having a constant issue the way we touch up our user frames for different programs. We currently touch up our welding bed that rotates and spins that has a rectangle frame and a flat jig for our jobs. When we touch up the user frame by touching a 5/8 sickout copper wire from the torch head to a locater pin at the Origin (bottom left) X (top left) and Y (bottom right) positions, the user frame is almost never consistently the same or in the same welding positions after. Any ideas on what could cause the positions to be so off every time?

Thank you

Our jigs come on and off, however we have been doing a lot of trial and error and the jigs are in fact moving so we are currently pegging the jigs in place so they should be the same every time.