[KaptainKarst]

I'll try to explain this and maybe there is a simple solution....
As you know the 3 in 1 machines like the Shoptask have 3 Axes. The X being left to right along the longest bed. The Y being the table that slides along the X axis and the Z being the overhead R8 spindle that moves up and down.

These are the conventional axes for milling operation and Mach3 works great.

Now to my delima:
If I want to lay out a simple lathe job, I have been using a cad program to draw my object. This is done in the X and Y plane and translates well to the 3 in 1 machine setup and Mach3.
However, conventional CNC (and manual) lathes use Z and X axes. Z being the long, right to left movement and X being toward or away from the center of the object being turned.

What I am trying to do now is to use the CNC lathe of the 3 in 1 machine to cut a radius or ball on the end of a a piece of round stock in the lathe chuck.

I can lay this out in the CAD program with no problem.
and the Gcode is generated via Sheetcam with no problem.

Now, you and I both know that I cannot just plunge my lathe tool in and cut the entire radius in one pass. So now I need to use the multipass function of Mach3, but alas, it only supports multipasses if a Z depth needed.
If I then convert the Gcode for X and Z codes, then the I and J gcode commands are wrong and all is screwed up.

How are you guys using a 3 in 1 machine for CNC lathe operations that involve radius cuts?

I hope that was clearer than mud....