I currently have mach3 set up using 4 motors X,Y, Z and slave the Y using the A axis. I want to include a 4th axis i.e. rotary positioner . I guess I have two questions about that.
Q1: Can I use the B axis as an alternative to A axis
Q2: If I reconfigured the controller wiring to run both Y axis motors off the same pins, which would then free up the A axis would that be an advantage? As both Y axis motors currently home separately I find this useful to square the table but could be persuaded to switch to dual Y.