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Joined 2 years ago
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Cake day: July 1st, 2024

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  • I mean, this was my first question as well. If you say “I don’t trust that guy with my kids,” then you also should not be leaving that person alone with your kids. If you do leave him alone with your kids, people aren’t wrong to say that you very much are trusting him with them.

    So I think it’s legitimate to ask whether they mean they “don’t trust Chinese and US firms with their data” in the sense that they do not provide their data to them, or just in the sense that they do give them a bunch of data, and then feel misgivings about it.

    Which, y’know, it’s something you have a limited degree of control over, certainly, and we don’t want to fall too much into blaming the victims. But as someone who didn’t manage to actually get off Facebook until last year, I definitely felt for a long while before that like I was complicit in my own exploitation, and contributing to a societal problem. I think even the people still there know that cancelling it is the low-hanging fruit in terms of reducing the amount of data in the hands of dubious firms.





  • I built one, but it was a (top-down) resin printer, so I don’t think I have any useful advice to offer. Also, I kinda burnt out on the project after I came in one morning and found the resin had melted the vat and leaked onto the floor–somehow I just totally failed to consider that the solvents in the resin could obviously dissolve a lot of plastics. Huge mess, huge pain to remediate. At least it was a concrete floor. I got a replacement vat in glass, but I never worked up the will to work on it again. It did basically print before that, but I had a lot of off-layer curing and didn’t get to do much work on tuning that in before the accident.














  • I sincerely think that China’s massive government investment in solar panel production is the biggest thing our species has done about climate change. It’s the reason it’s now cheaper to build a new solar plant than to continue to operate an existing coal-powered plant. (Though we’re not doing that in the US, because we’ve bottlenecked grid connection requests, which is holding up a ton of new solar buildouts.)

    I mean it’s not enough yet, but it’s made a huge dent in the problem. Economics actually favor shifting to renewables at this point. It’s just the entrenched interests working against it we have to overcome now.


  • Thanks! I haven’t actually published these pieces yet. (Well, the slide-glide cyclide thing was published by someone else, but I think it was later taken down–there may be plans for the original mathematician to sell them?) The puzzle box is just a little too kluged together to really publish; I modified a lot of things after the fact to get it together, and I’m not comfortable publishing it in that state, but I also don’t really want to put in the work to finish it. The kaleidoscope would actually be okay, but it’s limited–it’s a bit tricky to actually cut the mirrors, and it really only works to reflect things right up against it. I want to design an adapter for it that will hold an acrylic sphere (which you can get inexpensively from China) so that you can use it to look at scenes as well. But I haven’t actually gotten around to that yet either. I’ll give some thought to publishing it as-is, though.


  • I dunno. I agree with this to some extent for sure–I don’t print a lot of the meme models that are everywhere on 3d printing forums. But there are toys that would not exist without 3d printing that I think are pretty great.

    I designed a kaleidoscope that reflects things not to tile a plane, but instead to tile the surface of a disdyakis triacontahedron: https://imgur.com/gallery/i-made-kaleidoscope-P4atHey I had to cut the mirrors from acrylic by hand, but the templates for them and the shell that holds them in place are all 3d printed. And that thing is a pretty great toy.

    This thing: https://imgur.com/gallery/make-of-cyclidial-iris-by-vergo-henry-segerman-XHN4MC0

    is a math sculpture that I didn’t design, just printed, but it’s completely beautiful, and it’s had real staying power as both a toy and a decoration. It sits out on our coffee table all the time, but my niece plays with it every time she’s over here.

    And this puzzle box I designed: https://imgur.com/gallery/i-made-puzzle-box-nieces-birthday-U1q408R

    was a big hit with her too. I’m not sure if she’ll continue to play with it long-term, but based on my own tendencies as a kid, I think she might end up investigating the mechanisms involved for some time to come.

    Things that you could buy at the store you’re generally better off buying at the store. But there are things it’s not economical to mass produce, and it never used to be possible to design and make your own toys. Both ideosyncratic toys and bespoke toys are pretty great uses of 3d printing in my opinion.