Perpetual motion - not quite - A mathematical, mechanical model
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I got the idea for this model from a YouTube video, so the principal layout isn't mine. Can't find the video for reference. The mathematics behind it is not terrible hard. But when it turns it's somehow mesmerising. As a lot of these kind of mathematical objects do. https://www.youtube.com/watch?v=lMXZbg5l0MU Use good filament and a good printer to print it. Stringing in the channels of the disc or inaccurate holes will need sanding or drilling. Tolerances are small by design. One millimetre front to back, all in all. 0.2 for the nuts and the holes. You will need additional hardware. Two M3 screws, four washers and two lock nuts. I'm in no way a fan of printing nuts, screws, axles, and so on. It's a fine model to test your printer. Especially the crank is very filigree. For me it clips together nice and worked out of the box. I did not need to sand any part, but needed slightly force to press in the bolds. All in all a snug fit, I'm happy with this. No glue at all. Don't break anything! Ah, and turn the "Triangle" upside down for printing. Sorry about that. That wood filament I used is awful. It expands after it's extruded and is stringy as hell (as wood filaments usualy are, I know). And it cloaks the nozzle and the PTFE tube. Not nice. But yes, it looks very nice. My first multi color print. Except for the wood one, it scratches, the others work very quiet. If you like the Fusion 360 files drop me a note. Maybe you like to enhance the stands, the design is standard at best.
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