Hod Lipson didn’t set out to revolutionize manufacturing. He just wanted to design a really cool robot, one that could “evolve” by reprogramming itself and would also produce its own hardware—a software brain, if you will, with the ability to create a body. To do this, Lipson (below, center) needed a rapid-prototyping fabrication, or “fabber.” Picture a 3D inkjet printer that deposits droplets of plastic, layer by layer, gradually building up an object of any shape. Fabbers have been around for two decades, but they’ve always been the pricey playthings of high-tech labs—and could only use a single material.
“To really let this robotic evolutionary process reach its full potential,” says Lipson, a Cornell University computer and engineering faculty member, “we need a machine that can fabricate anything, not just complex geometry, but also wires and motors and sensors and actuators.” Lipson and his grad student collaborators, Dan Periard (right) and Evan Malone, decided to put the problem to the people. They developed a low-cost, open-source fabbing system—Fab at Home—and encouraged experimentation by starting an online wiki for hobbyists. People report printing with everything from food (Easy Cheese, chocolate), to epoxy, to metal-powder-impregnated silicone to make conductive wires.
A Fab at Home kit costs around $2400. Lipson compares it to early kit computers such as the MITS Altair 8800, which democratized computer technology in the 1970s. At-home fabrication, Lipson says, “is a revolution waiting to happen.” As for that robot? Wait a year, he says, and it really will walk out of the machine.
