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Joined 3 years ago
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Cake day: July 2nd, 2023

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  • G Code is basically a geometric scripting languge and isn’t Turing complete in basic implementations. Every manufacturer pretty much also has their own dialect that is Turing complete.

    Gcode with control commands and variables is called, no shit, Macro G Code. It’s Turing complete. That form of variable names is normal and is inherited from hardware registers/banks and TTL.

    It’s not unusual for a save dialog to be labelled Punch as it has a direct lineage from punch tape.

    Kind of like assembly and a graphing calculator had an abortion together.


  • Trichocereus bridgesii, monstrose form. Called penis cactus or toothpick cactus depending on spines. T. bridgesii contains higher levels of alkaloids, including mescaline, than the more commonly used T. Pachnoi “San Pedro”. The monstrose form is said to be particularly potent, although it is slower growing.





  • Machinist@lemmy.worldtoScience Memes@mander.xyzMagnificent
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    4 months ago

    I very much agree. It is held up as this wonderful parable of how you should live. It’s the sort of thing that the powerful use to take advantage and abuse the weak.

    This kind of puerile shit is bad for children and is just like a lot of the Jesus crap that gets pounded into kids.










  • Correct! Insects have spiracles that basically passively exchange air. Max size is basically determined by this.

    IIRC, some caterpillars only stop growing and pupate when they run out of a growth hormone.

    I always wondered what would happen if you grew them in a high oxygen tank and supplemented their diet with the hormone.

    Maybe get a Mothman that way.


  • Machinist@lemmy.worldtoMicroblog Memes@lemmy.worldEvolution
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    6 months ago

    The midpoint to the end of Evolution, humans basically devolve and ultimately go extinct.

    It’s been awhile since I’ve read anything by him as well.

    I remember another book where artifically created people inside a dwarf star were dying due to solar harvesting, IIRC. I remember it being depressing but fascinating. Don’t remember how it ends.




  • This is a very sharp article. Think I first saw it on Hackaday. I should be using the checklist more often. If there is to be a 3D print bible like Machinery’s Handbook, this article is foundational.

    In particular, chamfers and fillets and their relationship to strength by reducing stress risers is often missed on amateur designs.

    I need to look at crush ribs and ribs for screws/bolts more.

    The idea of a sphere being the most efficent shape is counterintuitive when most mechanical design is inherited from subtractive manufacturing. Also, speed holes reducing strength and increasing material usage is wild. These are powerful ideas that are going to cause almost a philosophical change in manufacturing. It’s going to take decades. Absolutely mind-blowing stuff when you really think about it.

    DFM, in general, is a woefully underappreciated aspect of engineering. One of the great things about 3D printing is that the designer is generally forced to eat their own dog food.

    MEs should recieve more education about DFM. 3D printing would be an easy way to force them to understand the difficulty poor design causes. Of course, DFM for subtractive is a larger and more complex subject, but printing would at least teach the lesson with a little sting.