I really have a sweet spot for drawing machines. Sandy Noble developed his own version: the Polargraph. He was heavily inspired by Hektor, the spraycan robot, but also by the AS200 drawbot and Harvey Moon’s drawing machine. I really like the style of the drawings, which is probably defined by the dual-polar coordinates the system uses internally.
I guess it’s no surprise that he used an arduino board and processing to build the Polargraph.

found at triangulation blog