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10 March 2018, 05:46 | Jodi Jackson
Image source You Tube Video Screenshot
The researchers used another savvy, albeit 'counterintuitive, ' trick that helped them solve the puzzle in record speed. "We noticed that all of the fast Rubik's Cube solvers were using stepper motors and thought that we could do better if we used better motors", Di Carlo wrote in a blog post.
The speed improvement over previous attempts came as a result of the pair's decision to use better motors than previous competitors (Kollmorgen ServoDisc U9-series motors, if you're a hardware nut).
The video below demonstrates the Rubik's cube in an unsolved position and after that the actuators bounce vigorously, slamming squares into place like some kind of crazed version of Will Smith's character in The Pursuit ofHappyness.
"The machine can definitely go faster", Katz writes in a blog post, "but the tuning process is really time consuming". "It took tightening the cube way past what intuitively felt appropriate, in order to stop the camming action from happening". The algorithm used typically needs 19 to 23 moves to solve a cube. The creator also noted that several cubes were broken during their tuning process. According to the duo, the data provided by their tests suggest that the robot could complete the puzzle within 0.25 seconds.
Every movement of the robot takes just 15 milliseconds.
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