Built a 3 axis cnc router running kmotion, presently using a autodesk rs-274d slightly modified post processor that was modified by autodesk, works great for fusion 360. Now I want to use aspire which I believe to be vector output ? From what I'm researching is that aspire provides many post processors and that kmotion should work with one of their standard gcode post prossesors. They have a Gcode_Arc_Inch.PP, Gcode_Atc_Inch.PP and Gcode_Inch.PP. I think they are generic gcode post processors, they do have a long list of machine specific post processors as well.I believe the Gcode_Atc_Inch.PP is for automatic tool change which I don't have.I don't know if I should try the Gcode_Arc_Inch.PP or the Gcode_Inch.PP. I compared the post processor from autodesk which is lengthy with a lot of code and the post processor from aspire which seems very short with little code. Perhaps that's because Aspire outputs a vector, I think.Don't know enough about it to know if I should try the straight Gcode or the Gcode_Arc post processor. Or am I wrong and need a totally different post processor. Any one have any thoughts on what to try and what the arc one may mean? Joe