I was looking through the book, Design and the Elastic Mind, which accompanied the eponymous exhibit, and came across Hektor. I had seen this somewhere before, or something like it anyways, on my Internet travels, but glad I was reminded of it, as it is surely worth a post.
Hektor is a simple 2-motor controlled plotter that has toothed belts and a can holder that handles regular spray cans. By programming a graphic in Illustrator using the Scriptographer plugin, you can have Hektor output nearly anything. It was created in close collaboration with engineer Uli Franke for Jürg Lehni’s diploma project at écal (école cantonale d’art de Lausanne) in 2002.