Some time ago the guys at Fablab Italia in Turin joined a city exhibition of art, design and related. The exhibition is hosted in Vanchiglia, a neighborhood of Turin, and it’s called Vanchiglia Open Lab (LOV). The project they managed to bring to the Open Lab is really interesting: a digital lathe which lets you interact physically with a 3D program and print your own sketch with the 3D printer.
You need 5 potentiometers hooked up to the first five Analog pins of Arduino. 4 of them are used to modify the shape, the fifth is used to change the step & resolution of the shape. An Hoberman-style sphere lets you control the rotation of those 5 pots in a different way.
Wanna try? Donwload project files (Arduino, Blender, Laser Cutter) from Fablab Italia’s Wiki.