I am currently building a OA/Plasma table. I have no problem using CAD (AutoCAD) to generate my drawings. I also have BobCAD/CAM with BobNest.
I am going to be using MACH3 (should have it along with my other items from CandCNC)
I have downloaded the trial version of MACH3 & Downloaded & Printed the manual & watched some of the videos.
I still haven't figured out how to go from CAD to the point a file is loaded in MACH.