Robert Howsare’s Drawing Apparatus attaches a Sharpie to records spinning on a record player at different revolutions. It’s a good thing this video is only 1 minute 45 seconds, because I could watch it for at least 17 minutes and 6 seconds, and really who has the time?
Regarding my post about Tim Knowles’ work, Greg sent in a couple of links to similar projects. Olafur Eliasson created these drawings much like Knowles did with his Vehicle Motion Drawings, except he used the motion of his father’s fishing boat. William Anastasi has done drawings for almost 40 years by letting his pen drift on a piece of paper while riding the subway.