5 ms·
Robot smashes Rubik’s Cube record with 0.38-second solve
- mrguyorama 9y agoThey discuss "tightening up the cube", but it also looks like it's been modified in other ways, most significantly; rounding the corners of individual pieces of the cube. Has that rounding come naturally just due to use? Or did they round the corners intentionally?
- jackhack 9y agoGood observation. It's clearly not a stock out-of-the box Rubix's Cube. My recollection from childhood was that it took considerable tuning (with sandpaper) and greasing afterwards to loosen one up to move smoothly. From the comments : "With a bit of practice and almost any other brand of Rubix cube (the Rubix branded ones suck)" It's interesting that the bot rotates the centerpoint, while human hands would grasp the edges and compress the blocks together. The slow-motion camera .05x view was amazing. The inertia of the blocks is evident. We see this sort of problem in motion control routines for robots. A motion needs an acceleration/deceleration rate or parts get over-stressed and tend to blow up, or at the least overshoot targets.
- JHonaker 9y agoIt looks like its just a standard speed cube. Here's [1] a model that looks almost identical to the one they have. There is an entire industry of Rubick's cube makers that make cubes specifically designed for people that like to try to solve them as fast as possible. They're typically much smoother to turn with a lot more flex in the joining mechanism before it all pops apart. The increased flex allows you to turn the cube along a different axis even if you haven't perfectly aligned the cube to neutral yet. [1] https://speedcubeshop.com/collections/3x3/products/cyclone-boys-feijue-m-3x3 https://speedcubeshop.com/collections/3x3/products/cyclone-b...
- mrguyorama 9y agoIndeed that looks like the exact correct product. Interesting how cheap it is for a "precision" and niche product