See a robot solve Rubik's Cube in 3s

March 17, 2014 // By Nick Flaherty
A robot using ARM technology has set a new world record of 3.253 for solving a Rubik’s Cube
CUBESTORMER 3 is the result of 18 months of effort by co-inventors David Gilday and Mike Dobson who worked on the project in their spare time. The new record was set at the Big Bang Fair in Birmingham, UK, and beats the existing time of 5.27 seconds set two years by the same team. David Gilday is a principle engineer at ARM, the world’s leading processor design company based in Cambridge, and co-inventor Mike Dobson, a security systems engineer for Securi-Plex.

"We knew CUBESTORMER 3 had the potential to beat the existing record but with the robot performing physical operations quicker than the human eye can see there’s always an element of risk," said David Gilday, "In the end, the hours we spent perfecting the robot and ensuring its motor and intelligence functions were properly synchronized paid off. Our big challenge now is working out if it's possible to make it go even faster."
The record-breaking robot employs intelligence from a Samsung Galaxy S4 smartphone powered by an Exynos 5 Octa application processor with an eight-core ARM big.LITTLE implementation featuring four Cortex-A15 and four Cortex-A7 processors. The phone analyzes the cube, calculates the correct sequence of moves and instructs four robotic hands to do the manipulations. ARM9 processors also power the eight LEGO MINDSTORM EV3 bricks which perform the motor sequencing and control.
"The robot demonstrates just how fast a Samsung Galaxy S4 can think," said Gilday. "As well as working out the solution, the ARM-powered Exynos processor has to instruct the robot to carry out the moves. This is more complex than it seems because CUBESTORMER 3 uses a speed cube which allows twists before the sides are fully-aligned. It means the robot is effectively mirroring the same kind of judgment and dexterity that a human speed cuber has to apply."
Additional features include a precision independent braking system that delivers significant speed benefits and software optimized to take