White Castle will test fry-cook robot, Flippy, in September, in its newest incarnation as a robotic arm on a rail. With White Castle, Flippy's starting as a 24-hour-a-day French fry-making machine, ...
On most consumer 3D printers, the print head moves by sliding horizontally along rails, and vertically along rods. The Plybot is different, though, in that it "holds" its head in two robotic arms.