Post Ax3SlT2SAgS8Q7k5LM by wolf480pl@mstdn.io
(DIR) More posts by wolf480pl@mstdn.io
(DIR) Post #Ax3NM4kOqga44XN3Gy by gigabecquerel@chaos.social
2025-08-11T07:34:09Z
1 likes, 0 repeats
There are a lot of warnings for CF / GF loaded 3D printing filaments, so I wanted to see what's going on.I printed a piece of Prusament PP-CF and it felt like a Kiwi fruit! The @FabLabMuc SEM Pics explain why: There are tons of exposed Carbon Fibers on the surface! It's pretty rough overall, doesn't look like any other 3D print I've seen before.I'm surprised how many of these fibers just stick out, like they're not embedded in the plastic at all!The last pic is of a broken edge.
(DIR) Post #Ax3NM6GhC60amzUMFc by wolf480pl@mstdn.io
2025-08-11T07:42:31Z
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@gigabecquerel @FabLabMuc do you know how that compares to a carbon fiber + resin composite that was cut and/or sanded down after hardening?
(DIR) Post #Ax3NhEyxzTnfteHD84 by gigabecquerel@chaos.social
2025-08-11T07:46:21Z
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@wolf480pl @FabLabMuc Nope, I have zero experience with those.I'm guessing (hoping!) resin embeds the fibers better than whatever this is.
(DIR) Post #Ax3PIrBb0rZd3HgVG4 by cjd@pkteerium.xyz
2025-08-11T08:04:20.709977Z
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I don't know this for a fact, but I think filament doesn't bond that well with carbon fiber, compared to epoxy resin. Epoxy graphene is stronger than steel, but from what I've seen, PLA graphene is really unimpressive.My instinct is that if you want really strong stuff, it's better to print molds and then cast it from good composites.
(DIR) Post #Ax3PnKcAAAEf0hdtQW by wolf480pl@mstdn.io
2025-08-11T08:09:53Z
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@cjd @gigabecquerel @FabLabMuc right, but that requires a fiber-layup-and-resin-soaking skill in addition to the 3D printing skill. Which it makes sense to in if yiu're making model aircraft or rockets, but I see how someone who's mostly into 3D-printing and just needs one part that's a bit stronger would be tempted to use CF-containing filament
(DIR) Post #Ax3QOM5FfC9WHVu1tQ by cjd@pkteerium.xyz
2025-08-11T08:16:32.580300Z
1 likes, 0 repeats
True enough. Something that rattles around the back of my head is how to make composites easier to cast. Layup sucks, it's always a manual process, carbon fiber just really doesn't "pour". I'm really intrigued by graphene because it's like 1/2 % of dust added to your liquid and it gives you a wildly stronger result. But there's other stuff you want in a composite that doesn't flow so well. Stuff like silicon carbide is incredibly cheap if you buy it in bulk, and the hardness is almost at the level of diamond, but these are typically sesame seed sized stones you need to somehow include into your mold...
(DIR) Post #Ax3QldF42GPI9oak1g by gigabecquerel@chaos.social
2025-08-11T08:20:44Z
1 likes, 0 repeats
@wolf480pl @cjd@pkteerium.xyz @FabLabMuc Ah, now I see where you're coming from!I'm not a mechanical engineer, so I can't speak to the properties of CF FDM versus CF Resin... when I need strong parts I just machine them out of metal 😅 Also, keep in mind, I have no idea of the fibers sticking out are a (health) issue at all, I was just very surprised by them. I can't imagine being exposed to them is good for you, but I simply have no knowledge in that regard.
(DIR) Post #Ax3QthCtB5l4lrQ43M by wolf480pl@mstdn.io
2025-08-11T08:22:15Z
1 likes, 0 repeats
@cjd @gigabecquerel @FabLabMuc > layup is always a manual processUnless you're Thales Alenia and/or Boeing :P
(DIR) Post #Ax3RRVf2bzgSo8i8vo by wolf480pl@mstdn.io
2025-08-11T08:28:21Z
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@gigabecquerel @FabLabMuc OK so- clearly you're not seeing CJD's posts, his instance is probably blocked by yours- it was CJD that pulled it into the "what's practical to DIY" direction- I did get that you're unsure about safety of these sticking out fibers
(DIR) Post #Ax3RmXohn8EDZjGH2G by cjd@pkteerium.xyz
2025-08-11T08:32:07.419026Z
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I think even if they're using robots, it's still "manual" in the sense that a process expert needs to be monitoring it. What really makes it manual for me is that there's kind of an art to getting it right and if you screw up you get air bubbles and weakness...3d printing used to be "manual" but software has gotten so good that it's kind of broken through that barrier and become a "push the button" and walk away process.For me, "mix chemicals, pull vacuum, pour" can also be considered automatic because there really isn't any "art" to any of those steps. Anyone can mix a recipe on a scale, anyone can draw vacuum until the needle reaches a certain number, anyone can dump liquid into a funnel...
(DIR) Post #Ax3S5kYwcwICbk30K0 by wolf480pl@mstdn.io
2025-08-11T08:35:37Z
1 likes, 0 repeats
@cjd then there are those who wait until the resin has just the right viscosity and carefully paint with it... though IIRC that's more for fillets and stuff
(DIR) Post #Ax3SYKAPqPYz8oCR6W by cjd@pkteerium.xyz
2025-08-11T08:40:45.557828Z
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There are people who like woodworking and pottery - and that's fine, but personally I like things that I can tell someone else what I did and I know they can repeat the same results that I got.
(DIR) Post #Ax3SlT2SAgS8Q7k5LM by wolf480pl@mstdn.io
2025-08-11T08:43:10Z
1 likes, 0 repeats
@cjd do you think there's a way to attach a CF-composite fin to a CF-composite rocket with a method that has your preferred properties?
(DIR) Post #Ax3TkZFBiLP1KYpk6C by cjd@pkteerium.xyz
2025-08-11T08:54:10.319587Z
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This is exactly the kind of thing which is really frustrating because it's so hard to make it strong without resorting to artisanal techniques.If it can be done with chopped fiber then that's a big win, because chopped fiber can be stuffed into a mold, then the mold is squeezed, evacuated, and injected. Then the attachment to the rocket body can just be a mechanical connection such as a wedged dovetail, taper-lock, etc.Putting glue or a bolt on something which already self-aligns may be manual, but it's not artisanal.
(DIR) Post #Ax3mOE0NtgKcDZy9B2 by wolf480pl@mstdn.io
2025-08-11T12:23:04Z
1 likes, 0 repeats
@cjd speakng of artisanalDo you like writing artisanal software?
(DIR) Post #Ax3mhtoAhNStMzdcWG by cjd@pkteerium.xyz
2025-08-11T12:26:34.654055Z
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Absolutely. It's not that I dislike craftsmanship, it's that I want to craft information (software, recipes, designs) which can be trivially copied and used over and over (and improved upon).A beautiful wooden coffee table is beautiful, but only for the person who has it in his living room, and only for its useful lifetime. A beautiful piece of software is beautiful forever, even if it falls into disuse, it may train some AI, or be the source of further inspiration.
(DIR) Post #Ax3n3MWp73ReWcl3lg by meowski@fluf.club
2025-08-11T12:30:29.052282Z
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@cjd @gigabecquerel @wolf480pl industry is moving toward automated fiber placement with pre-preg fiber. casting requires short fiber length and more binder to flow enough for molding so it's not as strong
(DIR) Post #Ax3oWrkSDW95hhlY7k by thatguyoverthere@shitposter.world
2025-08-11T12:47:03.389704Z
1 likes, 1 repeats
@cjd @wolf480pl handmade furniture can be passed on to children and become an heirloom outlasting generations. There is no software equivalent.
(DIR) Post #Ax3p5IIc0XSDtc9xdg by cjd@pkteerium.xyz
2025-08-11T12:53:13.743818Z
2 likes, 0 repeats
Yes, handmade artisanal objects are valuable because they are one-of-one. There's no software equivalent because software does not have scarcity.That said, the probable impact on civilization of spending 10 years learning to make beauty out of wood is less than the impact of spending 10 years learning to make beauty out of information.So both are totally legitimate and I don't want to disparage the first, but I prefer the second.
(DIR) Post #Ax3po5gjk1nRobnwHo by dwaltiz@pleroma.soykaf.com
2025-08-11T12:54:22.781652Z
2 likes, 0 repeats
@thatguyoverthere @wolf480pl @cjd something something permacomputinghttps://web.archive.org/web/20221217064848/https://thedorkweb.substack.com/p/the-100-year-computer
(DIR) Post #Ax3pvtDO07u3RjnKjY by cjd@pkteerium.xyz
2025-08-11T13:02:43.648471Z
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> 100 year computerThe transistor after doing it's 735 quadrillionth CPU cycle:
(DIR) Post #Ax3r1nPKbaxz7vlJqa by wolf480pl@mstdn.io
2025-08-11T13:15:02Z
2 likes, 0 repeats
@cjd @dwaltiz @thatguyoverthere reminds me of https://en.wikipedia.org/wiki/Clock_of_the_Long_Now
(DIR) Post #Ax3raPjkbWPpqhovc8 by thatguyoverthere@shitposter.world
2025-08-11T13:21:19.060742Z
0 likes, 2 repeats
@cjd @wolf480pl I appreciate software development, but I find it unlikely that anything I build will have any longterm benefit for humanity.I think I've just resolved to living my small little life and making a difference where I actually can instead of wasting my life ignoring those around me in hopes I can help people I don't know (this isn't to disparage anyone who finds this persuit attractive although it may sound that way).I think there is an argument to be made that some of the great things people have built with computers have over time been used in less than great ways.Finally, and perhaps most importantly for me, I find wood working far less stressful and frustrating than software development. There is no end to the job of maintaining a piece of software. A piece of furniture still requires some maintenance, but it won't need to be completely rebuilt because of a change in the protocol of mortis and tenon joints.
(DIR) Post #Ax3sBFxBwOHQDnfufA by thatguyoverthere@shitposter.world
2025-08-11T13:27:58.537820Z
1 likes, 1 repeats
@wolf480pl @cjd @dwaltiz https://www.lookmumnocomputer.com/projects#/googol-counter that reminded me of this
(DIR) Post #Ax3sT0cLhOnprzOJX6 by cjd@pkteerium.xyz
2025-08-11T13:31:07.694406Z
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> Future historians discover machine from lost civilization> This thing must be some time travel shit or something> Hope it's time travel> Crank it up> Fucking clock.
(DIR) Post #Ax3serlIRxgTsaEL1U by wolf480pl@mstdn.io
2025-08-11T13:33:18Z
2 likes, 0 repeats
@cjd @dwaltiz @thatguyoverthere look, when we discover ancient machines from lost civilizations they're always clocks too...
(DIR) Post #Ax3skg9WWey9byKllY by cjd@pkteerium.xyz
2025-08-11T13:34:18.996988Z
1 likes, 0 repeats
Lol, you're not wrong...
(DIR) Post #Ax3t8FzpQTuPRH2fdA by thatguyoverthere@shitposter.world
2025-08-11T13:38:38.334130Z
1 likes, 2 repeats
@cjd @wolf480pl @dwaltiz Thousands of years making clocks, yet no real world benefit (we can't even agree on how long we've been making clocks).
(DIR) Post #Ax3tlqHOSY5DGO8Li4 by nicholas@aklp.club
2025-08-11T13:45:44.298059Z
2 likes, 0 repeats
What's the point in trying to conquer chronography with science and engineering when some moron politician is just going to come around and legislate that you have to change the time twice per year?
(DIR) Post #Ax3tsy125xcnHdsWZc by wolf480pl@mstdn.io
2025-08-11T13:47:03Z
3 likes, 0 repeats
@nicholas @cjd @dwaltiz @thatguyoverthere first of all: because it's difficult, which makes it funsecondly: that's why you put it inside the top of a mountain where politicians are unlikely to look