CubeStormer II solves the Rubik’s Cube puzzle faster than the human world record.
This ARM Powered robot was designed, built and programmed by Mike Dobson and David Gilday, creators respectively of CubeStormerhttp://youtu.be/eaRcWB3jwMo and Android Speedcuber http://youtu.be/ylFb4pqAUd8.
The mechanics are constructed entirely from LEGO, including four MINDSTORMS NXT kits, with the addition of a Samsung Galaxy S II smartphone running a custom Android app as the robot’s brain. Both the MINDSTORMS NXT kits and the Samsung Galaxy SII use a variety of ARM –based processors.
The robot set a new record of a 5.270 seconds to complete the puzzle earlier this month, shaving a massive 58.73 seconds off the previous world record of 64 seconds.
The app uses the phone’s camera to capture images of each face of the Rubik’s Cube which it processes to determine the scrambled colours. The solution is found using an advanced two-phase algorithm, originally developed for Speedcuber, enhanced to be multi-threaded to make effective use of the smartphone’s dual-core ARM Cortex-A9 1.2GHz processor. The software finds an efficient solution to the puzzle which is optimised specifically for the capabilities of the four-grip mechanism. The app communicates via Bluetooth with software running on the ARM microprocessors in the LEGO NXT Intelligent Bricks which controls the motors driving the robot. During the physical solve, the app uses OpenGL ES on the phone’s ARM Mali-400 MP GPU to display a graphical version of the cube being solved in real time.
Human speedcubers’ solve times only include the physical manipulation of the cube and don’t include some time which is allowed to “inspect” the cube beforehand. Times recorded by CubeStormer II are for the total solve including: image capture, software solution calculation and physical solve.
In the video below we talk to its makers Mike Dobson and David Gilday about how they built Cubestormer II and what it means to them to be world record holders.
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