JAZZCNC,

The axes are independent (X,Y,A,B). I left Z for a rotating platform to do some funky shapes in the future (but I get ahead of myself :-) )
I have it running under G code control, but it is a real pain to get the wire close to the starting point of the cut when you cannot move the towers in parallel:) I've been trying to do with brains (mine and the MACH3- not sure who's winning yet:-) ), but cannot seem to find the right codes to use to make things happen. I have found no good info on what specifically each of the DRO, Button, etc. codes can do...