When I do an overhang test, I always have this problem at about 35°. Does anyone have a suggestion what could be causing it?

  • Slicer: Orca
  • Layer height: 0.2mm
  • Infill: 0% (this has improved it a lot, I think the infill was causing bulging)
  • Outer walls: 2
  • Overhang speed: 10 or 20mm/s (both look the same)

Solution: I mistakenly thought overhang speed in Orca was based on overhang angle, it is percentage instead (which makes much more sense for different layer heights). My 10-25% overhang speed wasn’t set to slow down and that must translate to about 35° at 0.2mm layer height. I now have it set to 30mm/s and it now looks great 👍 And sorry, I was wrong when I stated the overhang speed 😅

    • Valmond@lemmy.worldEnglish
      51·
      9 months ago

      I came here to say augment the print temperature! Look at those non binding “tubes” that are laid down every layer! They should melt into each other or it’s just crap and they’ll break under their own weight.

      Upping the fan is not needed here (yet, see below). It’s good when doing overhangs or printing without support and stuff start to sag down. When anything sags down probably :-)

      So up the temp for the overhangs, if they become too “liquid” then up the cooling(so fan speed).

      • UnH1ng3d@lemmy.worldOPEnglish
        3·
        9 months ago

        Thanks guys. I will try both and see what works. My layer adhesion is good / parts are strong though.

  • JoShmoe@ani.socialEnglish
    2·
    9 months ago

    Looks like the deformation is happening on the same layers where the overhangs of the number 35 are.

    • UnH1ng3d@lemmy.worldOPEnglish
      3·
      9 months ago

      It starts just underneath actually, but it still could be related 🤔 Maybe I need a test without numbers.

      • damiumEnglish
        4·
        9 months ago

        If 35° (or something close to it) is the slicer setting for overhang detection it likely changes the cooling/speed/flow settings. If that is the case you can set it to a lower detection value and maybe get better results or change the normal cooling/speed/flow to be closer so it isn’t as drastic of a change.

        • UnH1ng3d@lemmy.worldOPEnglish
          2·
          9 months ago

          You may actually be right even though I thought I had checked this. Orca’s overhang speeds are based on overhang percentage and not angle, I previously just looked at the number and assumed it was degrees 🤦‍♂️I will match the speeds for all overhang percentage ranges and see if that solves it 🤞

        • UnH1ng3d@lemmy.worldOPEnglish
          1·
          9 months ago

          This was it! I had my 10-25% (not degrees 😅) overhang speed set not to slow down at all. I now have it set to 30mm/s and I have a perfect result. Thank you 👍😁

      • JoShmoe@ani.socialEnglish
        1·
        9 months ago

        I believe that if your layers are printing fast enough, the softer material would bend according to where the top layer is printed.

        • UnH1ng3d@lemmy.worldOPEnglish
          1·
          9 months ago

          Sorry, I didn’t follow that. Top layer of what? Not the actual top, top layer right?