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The Japanese created a self-assembled Rubik’s cube

Human Controller / YouTube 2018

The Japanese engineer created the Rubik’s cube, which is able to independently build all the segments of the same color on one side thanks to the built-in motors and the rotation sensors along the axes. The device’s drawings and photographs are posted on the DMM.make website.

Rubik’s Cube is not only a puzzle for independent entertainment, but also an object of competition. Usually they are conducted among people whose task is to solve the puzzle in the minimum time. For example, in May, Australian Felix Zemdegs (Feliks Zemdegs) broke the world record with a result of 4.22 seconds. In addition to people, this task is also solved by robots, and thanks to computer vision and fast servomotors, they do it much faster – the current record for a robotic assembly of the Rubik’s cube is 0.38 seconds.

The Japanese engineer chose a more unusual approach and created not a robot manipulating a conventional Rubik’s cube, but a robotic cube collecting itself. The first prototype he  introduced last year, but he was quite large and slow, and most importantly – required an external oscilloscope, which recorded the rotation of the segments based on data from the sensors of the angle of rotation.

The new prototype has standard dimensions for the Rubik’s cube and works completely autonomously. At the heart of the device is an engine mechanism, in which for each side there is a separate electric motor and gears transmitting the force to the axis with the segments fixed on it. In addition, in the inside of the cube, printed on a 3D printer, there are several microcontrollers and a battery.

On the video you can see that the cube is able to independently build all segments of the same color on one side from an arbitrary state.

The engineer does not disclose the technical details of the cube’s work. For example, it is not known exactly how the device tracks turns and whether it can independently determine the initial location of the segments while it is off.Previously, engineers created other unusual implementations of the Rubik’s cube with electronic components. For example, recently at Kickstarter thefundraising for the smart Rubik’s cube with Bluetooth, allowing to track the speed of assembly and other parameters, was completed. In addition, to solve this puzzle there are also software developments, including anaugmented reality application that imposes assembly instructions on the cube, as well as an algorithm for assembling a cube that has learned it independently for 44 hours.

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