Here's a gif of the replay, because we can't stop watching it: The Contraption managed to solve the puzzle in just 21 moves. This keeps them from trying to make simultaneous moves, and, in turn, prevents the Rubik's Cubes - they used very cheap ones - from exploding. The pair also built custom motor drivers and a custom AND board to make sure none of the motors are operating at the same time. The cameras are just two PlayStation Eye cameras. The six motors are Kollmorgen's ServoDisc U9-series, which Katz noted can be obtained relatively cheaply on eBay, as well as optical encoders on the back, also from eBay. The new Rubik's Contraption, as Katz and DiCarlo call their robot, uses a combination of custom parts, and easily acquirable ones. Previously, the world record was held by a machine called the Sub1 Reloaded, which solved a Rubik's Cube in 0.627 seconds in late 2016. Engineers and roboticists have been developing Rubik's Cube robots for some years now, and they've got it down to a fine art: a combination of cameras and actuators for the physical aspects of handling the cube, and software that is programmed to recognise the colours and return them to the correct sides.
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