• 26 Posts
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Joined 3 years ago
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Cake day: June 13th, 2023

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  • Those two would probably never have gotten started if not for how easy the Bambus are. It took me a month to get decent results off my first printer and they were up and running in a few hours tops.

    I’ve got to admit, I’ve never understood that sort of issue. I’ve owned two 3D printers, a Monoprice MP Select Mini (bought back when it was the only ‘cheap’ printer in existence… holy shit, probably almost a decade ago) and a Creality Ender 3 V3 SE (because it was the best ‘cheap’ printer as of a couple years ago), and both of them gave me decent prints pretty much out of the box. After bed leveling, obviously, but without any other weird hardware adjustment or excessive experimentation with slicer settings.

    I feel like the vaunted ‘superior ease of use’ of the Bambu stuff is overblown, but IDK, maybe I’ve just been lucky.





  • Even in the context of having only experienced certain other CAD software a little bit (e.g. SolidEdge for one class in college, SketchUp for making maybe a handful of models, total), FreeCAD really is worse to use. It’s not just the UI, (although it is partly that and it is genuinely worse, not just neutrally different), it’s that stuff just starts breaking whenever you try to do anything even slightly complex (even after the “topological naming fix”), and that the workflow is just annoyingly internally inconsistent.

    For example, you can make a sketch and then apply constraints to it and it’s all well and good, but then you extrude it and suddenly you have to declare the height by setting the properties of the extrude instead of using a constraint or dimension. I assume there’s some kind of workaround involving declaring variables in the data table thing I can’t remember the name of or how to access right now, but it shouldn’t have to be that way. You ought to be able to do things like create a cube by declaring an X edge to be the same length as a Y edge to be the same length as a Z edge using the same tool to set both relationships.

    And this is coming from somebody who refuses to use proprietary CAD as a matter of principle at this point, and therefore really, really wants to like FreeCAD.








  • Gas exchange also doesn’t happen in your arteries or veins, but in your capillaries. Your capillaries are small enough to just barely fit a single red blood cell (the RBC often need to bend to fit through) and that close contact of RBC and capillary wall allows fast and near complete gas exchange. The tightness of a capillary is a feature, not a bug. So it could be that you don’t have consistent contact with the same RBC for long, and mostly are in contact with blood plasma?

    Ah, so more or less the opposite of my guess. Man, I love Cunningham’s Law!



  • I’m not so sure induced demand is a thing for blood vessels, but LOL

    I think it’s more that, following Bernoulli’s equation for fluid flow in pipes, widening the artery while holding the flow rate constant means the velocity has to decrease. Maybe that means that the oxygen has more time to diffuse out before it reaches the point where it’s supposed to, so that tissue doesn’t get properly oxygenated?