dual_sport_dork 🐧🗡️

Progenitor of the Weird Knife Wednesday feature column. Is “column” the right word? Anyway, apparently I also coined the Very Specific Object nomenclature now sporadically used in the 3D printing community. Yeah, that was me. This must be how Cory Doctorow feels all the time these days.

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Cake day: July 20th, 2023

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  • Suggestions here and elsewhere to have no infill on tall structural components that will have large flat surfaces such as large boxes and bins is hilariously bad advice. Yes, “StReNgTh aCtChUlLy cOmEs fRoM ThE WaLlS,” but unless you plan to use an absurd number of perimeters and probably not even then, you absolutely need to have some infill to connect the inner and outer walls, otherwise they will be prone to warp and collapse in on each other. If your item will be as tall as you suggest, this is likely to happen before the print even finishes. Given the shape of the bottom of most Gridfinity objects, printing it entirely with no infill is impossible anyway. You can’t have a floor suspended in midair of any significant dimensions without infill underneath it to build on top of.

    You probably don’t need much infill, probably only 5 or 10%. But it’s going to have to be there.

    Don’t overthink it. I print these relatively giant Gridfinity drawer shells standing upright, and I use 10% gyroid infill, 2 wall perimeters, and 3 top and bottom layers. It works just fine and they’re perfectly rigid enough to stack at least four units tall (the most I’ve bothered to hook together to far) while loaded to the gills with probably more weight than is wise worth of knives and nuts/bolts.

    I tried to print one without infill precisely once, and it collapsed and failed after about 30mm worth of height had been built up. This was with PLA which is the most rigid of the commonly available printable materials; the issue would be even worse with other plastics.


  • Theoretically, but it would probably be slower than dogshit if you tried to do it over e.g. USB, and the administration would probably also not be pleased with you spending the entire exam with an external storage device conspicuously bunged into your computer.

    You could grab a cheap (relatively, these days) low-ish capacity SSD in whatever flavor your machine takes and install Windows on that with your primary drive removed and safely stored away somewhere, though, and then just swap them back when you’re done.

    If you want something to do with your secondary SSD afterwards there are enclosures you can get that’ll convert an NVME SSD into a super fast USB flash drive sort of arrangement, albeit typically dangling on the end of a short cable rather than sticking directly into the port, which makes a good modern day stand-in for those portable laptop hard drive enclosures nerds used to carry around in the early 2000s.









  • Many, many years ago I took an A+ certification course because it was provided free by the state. And a fat lot of good it did me, but it was amusing for a while all the same. (I tried to opt to just take the stupid exam, but no, you have to sit through the course.)

    We were given various old office PCs to fiddle with, and would use them throughout the course for all of the electronic learning materials. In order to instill in us a sense of the Troubleshooting Spirit, I suppose, the course’s instructor would deliberately fuck with everyone’s machine overnight so you’d have to track down what he did in order to get yours working again. Naturally this resulted in much wailing and gnashing of teeth, whining, sulking, and impressive displays of learned helplessness from the class which was always amusing to watch.

    For me, anyway. I was the only person there with any computer chops and at the place I’d worked at prior to this I was the only IT person simply by default. I’ve been plugging computers together since I was big enough to hold a screwdriver. Have you ever smoked a motherboard by failing to put the two AT power plugs in with the black wires in the middle, relative to each other? Ever made your own cable select IDE ribbon by carefully chopping out pin 28’s wire with a razor blade? No? Then I don’t want to hear it.

    It didn’t take long before I was forbidden to help other people with their troubleshooting stuff. Fine, I’ll sit here and play Doom until everyone’s finally ready.

    I tried, and failed, to convey the notion that messing with my PC was a futile effort. Short of outright stealing some vital component from it, you weren’t going to keep me down for more than about a minute.

    Anyway, the moral of the story is that most of the problems deliberately instilled in people’s machines involved unplugging some cable or another, and motherfuckers never figured this out. It’s truly astonishing how resistant people will be to considering the most obvious of solutions and starting there. Mind you, this was basically the entire point of the class so I didn’t hold out much hope for the future IT careers of my peers, to put it mildly.

    One day I found that the instructor had backed my network cable out slightly but left it hanging in the socket, unclipped, just enough to look still plugged in but not make contact. Obviously the lack of blinkenlights on the jack was a major clue, but this stumped quite a few of our recruits. I must have given him a sarcastic look or something when I clicked it back in, because the next day he got clever and covered the contacts on the end of the plug with a piece of clear tape and fully plugged it back in. That was devious. Not only can you not trust the user to lie to you, but now we have to contend with active sabotage!

    I got him back, though. I got into his presentation computer one day and discovered there was an unused USB header on the motherboard. One header-to-port breakout cable later and I plugged the receiver for my wireless mouse and keyboard into his machine inside the case and started messing with his cursor surreptitiously. What goes around comes around, Mr. funny guy.