Hello all, I am working with a (used) Motoman positioner (the locking pin type) with an NX100 welding robot. Anyway I have this issue that I just can't figure out. I have to keep resetting the home positions for table A and B about every two weeks. This happens when an operator breaks the light curtain. I don't know exactly what they are doing to try to recover from the light beam hold to cause this problem. I have instructed them to switch to teach mode and hold interlock test start until the positioner completes its sweep. I have tested this procedure multiple times and it has always worked. Several times the operator tells me that they use the procedure I described but when the positioner completes its sweep the pins are off and will not engage the table. The pins aren't off a ton just enough to cause a misalignment issue. What would cause this problem of the pins and table alignment being off??? I don't understand how this is possible since the positioner is geared.
Help would be greatly appreciated.