I take it that the home switches also act as limit switches for each axis? Did you use seperate switches for your e stop or use the home switch as well? I was going to add an e stop switch at the end of each axis. The only problem I will have is that my proximity switches need between 10 to 30v to work correctly so I will need to connect them to a relay and get the relay to switch the CPU4 signal, not a big problem but it needs to work correctly.

Ian