Comment on Better filament than ABS

• Badabinski@kbin.earth ⁨2⁩ ⁨weeks⁩ ago

  ASA can still warp, but an enclosed and warm build chamber should do a lot to squelch that. Are you printing on an open bed slinger? Or do you already have a build chamber?

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  • RememberTheApollo_@lemmy.world ⁨2⁩ ⁨weeks⁩ ago

    Fully enclosed.

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• dual_sport_dork@lemmy.world ⁨2⁩ ⁨weeks⁩ ago

  That’s because everyone starts with PLA, and PLA has the lowest shrink and warp of all commonly available materials… which is why it’s so common and everyone starts with PLA.

  Basically anything is going to warp more and compare poorly against PLA, but ASA’s shrinkage after cooling is less than half of ABS, so it compares favorably to ABS in particular. 1.6% vs 0.7% or something similar. PLA’s shrink rate, meanwhile, can be as low as 0.3% for competently manufactured blends. Shrinking while cooling is what causes warp, especially on broad flat objects.

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  • RememberTheApollo_@lemmy.world ⁨2⁩ ⁨weeks⁩ ago

    Yeah, PLA is easy, it just doesn’t have the temp resistance and durability of better filaments. It’ll warp on a hot car seat in the summer.

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    • dual_sport_dork@lemmy.world ⁨2⁩ ⁨weeks⁩ ago

      Yes. And I suspect due to its low temperature resistance (this an intuitive guess; I’m not exactly a materials science engineer) it also exhibits very poor cold creep/permanent deflection characteristics. ABS is actually the best of the bunch there, probably hand in hand with ASA.

      However, one thing people are often surprised to learn or discover about boring old PLA is that it actually has among the highest layer adhesion strength of the commonly available materials, I believe second only to polycarbonate, and it’s also the most rigid of the commonly available (non-filled) materials. At least at room temperature, anyway. It turns out that printing the screws for e.g. my Rockhopper or Adélie in anything but PLA amounts to being a fool’s errand.

      It’s tempting to think of the litany of plastics available in filament form to consumers as a simple linear and escalating spectrum with “cheap, flimsy, easy to print” and one end and “expensive, strong, difficult to print” at the other. In reality as you know it’s not quite so simple. If anything, the hypothetical graph describing the properties of PLA, PETG, PET, ABS, ASA, Nylon, polycarbonate, etc. would have to be three dimensional.

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      • RememberTheApollo_@lemmy.world ⁨2⁩ ⁨weeks⁩ ago

        All makes sense, of course. If I want a “pretty” non-structural print PLA is always a top choice. Fine, smooth, easily bonded with CA glue. ABS is a lot more finicky, but strong.

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• Natanox@discuss.tchncs.de ⁨2⁩ ⁨weeks⁩ ago

  Not the person you asked, but in my experience good (!) ASA is way better manageable. It still shrinks and can be annoying, but way less than ABS. As with ABS especially a good print bed and heated chamber is doing wonders.

  On a glass plate + 3DLac + Brim it goes absolutely nowhere. Quite the opposite, I have to further cool down the plate and use a scraper to get it off. There might be better plates available, I just went with the oldschool structured glass because I wanted things to fucking work during print.

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  • RememberTheApollo_@lemmy.world ⁨2⁩ ⁨weeks⁩ ago

    Thanks for the second opinion. Sounds like ASA is on the menu for a couple tryout prints.

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