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Joined 3 years ago
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Cake day: June 12th, 2023

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  • The right flowrate for dimensional accuracy is likely not the right flowrate to end up with solid parts where internal lines are properly smushed together. The sides of a 3D printed object aren’t flat, so if you adjust the flow rate so that the bits that stick out the most are exactly where you asked the slicer to put the edges of the wall, you end up with your internal lines just barely touching each other instead of properly bonded. You want to tune your flow rate to get solid parts when you ask for them, set the line width a little wider than your nozzle to give space for material to flow outwards (which happens whether or not you want it to, but things work better if you tell the slicer it’s going to happen), and then when you’ve got a part that really needs the dimensional accuracy to be right, maybe temporarily use Orca Slicer instead to get its precise wall feature.



  • They stock things they make more profit on. If the margins on sugar water are much higher, then they don’t need to sell as much to make it worth stocking it instead of juice. If the margins are higher because consumers are unaware they’re being sold a cheaper-to-manufacture product for the same price because the packaging is deceptive to anyone who hasn’t been told they have to look or is in too much of a rush to have time to look, then shops end up full of sugar water that few consumers actually want.








  • Modern nukes contain a subcritical mass of fissile material and require an injection of tritium to arm them, and also require tritium for their second stage to get most of their rated yield. Tritium doesn’t last very long, so needs regularly topping up. If you’ve secretly buried a nuke, you’ll have to dig it up pretty often, undermining the advantages of secret burial. There’s also not much point in having a better nuclear deterrent than your enemy knows about, as the goal is to make them know you can destroy them so they’re too scared to attack you rather than to actually destroy them.



  • For plenty of industries, that kind of thing is true, but there are loads of manufacturers of batteries so forming a cartel and agreeing not to bother with any new technologies is impractical, and buying out new competitors with new technology and stifling it only works if your competitors also stifle everything new that they buy. There are a bunch of nation states backing their domestic battery producers and desperate for any way for them to outcompete those of other countries, and cartels tend not to form between state-backed companies from geopolitical rivals.

    The big thing stopping new technology appearing is that we’re pretty good at making lithium-based batteries, so you generally end up with a better battery for less R&D effort by making a small improvement to lithium batteries than coming up with something new, even if the theoretical limits for the new thing would blow modern batteries out the water. Sodium batteries have the advantage that lots of the knowledge that applies to lithium batteries is still useful, so the road from theoretical to good is much shorter, and we’re already using all the lithium we can extract and that’s representing a large fraction of a battery’s cost, so there’s a market for something cheaper even if it’s worse.