I have a 3 axis, 4 motors table top cnc mill and I would like to add a 4th axis to learn how it works for hobby work. I have no problem getting the mechanical / electrical parts installed for a 4th axis but I have no clue how to get Mach3 setup for it + the related gcode.

Is it possible to get some basic instructions on how to setup Mach3 and the gcode explanation related to a 4th axis? I have access to MastercamX5.

Thanks