Quote Originally Posted by Neale View Post
How are you planning to use the dual home switches (Y axis in your case?). Generally you do this for gantry squaring, but only if your motion controller supports this (and not all do!). I don't think that Mach3 can do this either. I have the same problem on my own machine, by the way, and not trying to pick holes in your design. It's just one of those things that isn't obvious until you come to try to do it...

Personally, I home my dual-axis using just one home switch and manually tweak the other side for squaring purposes as my motion controller is no help at all in this area.
I'm going to try linuxcnc which does support gantry squaring (Whether it works with my BOB we'll see) at least in 2.8, a quick google and it appears mach 3 does as well.

I'll try mach 3 as well, I planned a 2 pc setup for the cnc machine just in case with windows 7 & Fusion on one and the other with linuxcnc that way I can try both easily and have convenience of cam next to the machine.