I think a number of people use the U axes for a rotary with a 6445.
You have the configuration setup for limit switches on all three axes. That’s strange as there are no wires going to the controllers limit switch inputs… ?
There is no wiring to the Y axes home switch input either… ?
How does this actually home since some of the hardware is missing?
I see, you turned off the homing on the Y axes…
IMHO you are making a simple addition very complicated…
