I’ve been noticing some delamination (layer separation), but only on solid infill and top layers, and only on larger surfaces

Initially, I tried reducing speed, but didn’t notice any improvement

There are no noticeable issues on short lines, so I think this is something to do with acceleration, which I didn’t realise was a thing, but there are indeed settings for this in OrcaSlicer

Update:

Reducing acceleration does seem to have resulted in less severe delamination, but it hasn’t gone away completely

So I think I need to reduce it just a little bit more

  • jokeyrhyme@lemmy.mlOPEnglish
    2·
    7 days ago

    okay, just viewing the job layer by layer, i can see that the first solid infill layer after the sparse infill is treated as an overhang/bridge and triggers 100% cooling fan (otherwise it’s at 0% for the rest of the print)

    and on some items, i can see where the delamination on this layer caused problems on the next couple of layers on top

    but, on other items, there’s still delamination happening on the very top layer even without any issues beneath it

    • teotwaki@lemmy.worldEnglish
      3·
      6 days ago

      The very top layer would also have high cooling fan, no?

      It could be your cooling fan is just waaaay too powerful, and causing the plastic to not flow and bond correctly to the lower (or following) layers.

      • jokeyrhyme@lemmy.mlOPEnglish
        1·
        5 days ago

        According to the print visualisation, there is no cooling at all on the top layer, only on the 3rd-from-the-top layer, which is right above the last sparse infill layer (I have top shell thickness set to 3 layers)