In order to produce the sort of program a CNC machine can execute, you don't simply "export" the CAD model to the router or mill; you need another piece of software, called "CAM" for Computer Aided Machining which breaks the model down into toolpaths for specific tools and machining operations. Deskproto is an example of a CAM program with a fairly simple interface. 3D printers are similar; they require a "slicer" and there are lots of them available for download. Repetier and Cura are a couple of popular slicers you could check out.