[voidUpdate]

CNC is CNC, if you can put an attachment on it, it'll probably work. If you replace the hotend with a router and make the extrusion wires turn the router on and off, you have a CNC router. If you use a swivel knife, you have a vinyl cutter

[IdiotSavage]

Only in theory. A 3D printer doesn't need to sustain lateral forces - a router does. It might not be built for this.