I've been trying to etch QR codes in copper. I like the way they look and had thought it would be a easy thing to do with my CNC. What I did not expect was how difficult it was to convince Inkscape to cut away the proper areas rather than just trace the bitmap patterns. I have yet to producing a working QR code in copper, but wanted to share with you the results thus far. Anyone have a favorite qr code to gcode converter?