PrimoGraf Drawing Machine
The PrimoGraf is a hand cranked drawing machine. Using wooden gears with prime number based gears an infinite array of drawings can be made. It comes complete with 7 gears, 2 set of rods and penholders so you can create many variations. Different setups can be achieved instantly by simply picking different holes.
Made of walnut, basswood, and solid brass. All the wooden parts and gears are made in our studio here in Portland, Oregon.
This new version differs from the photograph since the box now has walnut sides.
See it in action in a Youtube video: