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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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Joined 3 years ago
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Cake day: July 20th, 2023

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  • FWIW, FreeCAD does not use the GPU for geometry calculation at all. That’s done purely in software and insofar as I’m aware it’s not even multithreaded. Your GPU is only used in any capacity for final display, i.e. spinning the already calculated model(s) around in the preview window which it does via OpenGL. Otherwise it’s all CPU.

    Spinning a complicated model around at 244 FPS (my monitor’s maximum display frequency) makes my GPU peak at all of… around 3.5%. Doing a total recalculation on said model or changing a feature on it spikes CPU load momentarily but doesn’t register on GPU usage at all. Doing the same on my laptop which instead has the usual early-gen Intel Graphics Decelerator in it doesn’t provide much of anything different in the speed and usability department. OP’s problem therefore surely lies elsewhere.





  • From TFA:

    Manufacturers may comply through three methods specified in Section 6(2) of the bill: integration of the algorithm in the printer’s firmware, integration in preprint software, or a handshake authentication design between software and printer.

    Nobody’s going to do this in the printer itself; the spyware will be built into the slicer.

    Ultimately this will be trivially easy to defeat no matter what moronic legislators who possess no technical knowledge think. The real dangers are more subtle, not least of which being the chilling effect if this passes effectively instructing all 3D printer manufacturers not to sell anything in Washington state since total compliance as the bill proposes is indeed effectively impossible, and the penalties for presumed lack of compliance are high. The most realistic outcome for a private individual vis-a-vis potentially printing a ghost gun is not necessarily having their printer tattle on them, but the state having yet another byzantine felony they can charge people with if they get caught after the fact with whatever-it-is they have. Never mind the 1st and 2nd amendments, the only realistic avenue for enforcement of this on private individuals will run afoul of the 4th.



  • I’m in agreement with the others. This is a printer issue, not a model design issue. Any current printer in good working order and running non-insane settings should be able to print a 90 degree inside corner like that with no problem.

    Some possibilities:

    Your Z offset may be set too high, so that your first layer height is too tall. This will result in the first layer’s extrusions not sticking to the bed and each other, peeling off in strings like you see here.

    Flip this over and show us the bottom of it. The effects of a too-high first layer should be readily apparent. That’s where my money is.

    Your printer may also be attempting to round the corners too fast. You could slow down your print speed, or adjust your linear advance settings. If you are using Prusaslicer or a derivative thereof (Orca, Qidi, etc.) there are built-in calibration prints you can run that will provide you a range of values to inspect my physically printing them, and allowing you to choose from the value that produces the best looking result. Ideally your linear advance/pressure advance setting should be tuned for each spool of filament, but in reality most people (myself included) don’t bother until they observe an issue. I use the same settings for all PLA, and a different set of settings for all PETG, and another for ABS, etc.







  • Qualified immunity protects government actors from civil penalties (lawsuits) as a result of their actions while on duty and when not violating the constitutional/civil rights of citizens (that’s the “qualified” part). I.e., you can’t sue the cops for the damage to your doorframe after they kick your door in serving a warrant. It does not protect government actors from criminal prosecution and does not grant them license to violate existing laws, and it never has.

    This is also true for ICE, which is why Vance and Stephen Miller are suddenly so keen to start screeching that they think ICE now magically has “absolute” immunity, which there is also no legal basis for whatsoever. Those pulling the strings know that ICE is in fact routinely breaking the law, and they’re desperately trying to get out ahead of it while anyone believes that any shred of equal protection under the law still exists.


  • He may be deranged, and he probably is, but Trump does not want Greenland for spurious reasons. Pretending that this whole situation is unfolding just because he’s Ol’ Mr. Sillypants is exceedingly dangerous. Trump wants Greenland because Putin wants Trump to take it, and the inevitable fallout will also lead to the US withdrawing from NATO. As it stands now, Putin cannot pass his navy through into the north Atlantic without it easily being blockaded by NATO from the coast of Greenland to the coast of Norway.

    Having half of that stretch of ocean conveniently occupied by nearby US ships instead which is conveniently currently nonagressive with Russia would be very beneficial for Putin.