I am having trouble running the xy zeroing routine on my PRT Alpha. I have adjusted the prox switches, the lights work, checked the wiring, etc.
The X works fine, runs neg, stops at the prox, runs back to zero, stops, runs neg, stops then runs back to zero.
Y runs neg and does not stop at the prox switch, hits the stop and trips. The light works on the switch and on the screen then goes out as it moves past and hits the stop.

What is wrong?