Hacked milling machine spreads graffiti poetry around town.
We tend to think of graffiti as being a semi-permanent mark left by an unauthorized artist, but Dutch sand writing artist Gijs van Bon wants his work to be ephemeral, so he designed a machine that he calls Skryf that writes on the sidewalk using sand.
Skryf started life as a CNC milling machine used for woodworking, but Van Bon hacked it so that instead of cutting wood, it lays down a thin line of fine white sand as it goes. The computer controlled cutting head now holds the sand dispenser, and moves so that the letters are laid down as neatly as any typewriter.
http://www.dvice.com/2014-1-31/hacked-milling-machine-spreads-graffiti-poetry-around-town
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