63 Dart bezels and 3D printing?

Nice. My curiosity about this is. When you print this, what is the code that it is either programmed with or that the machine reads? I have CNC capability for medium sized objects and never thought to find out if the two cross over.

So I created a 3D cad file (igs) for the part and export a (STL) file. The 3D printer accepts STL files and creates a "slicer" program for coordinates to printer. My son does the conversation (his printer/free software) so I don't know what final file format is. Does that answer your question?
I know some printers accept G-Code, not sure if his is one of them or not.