3DPrinting
3DPrinting is a place where makers of all skill levels and walks of life can learn about and discuss 3D printing and development of 3D printed parts and devices.
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I did some reading before asking and ASA was mentioned as also having difficulties with warping. Has this not been the case in your experience?
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?
Fully enclosed.
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.
Thanks for the second opinion. Sounds like ASA is on the menu for a couple tryout prints.
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.
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.
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.
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.