I’m trying to diagnose what tuning I need to get a smooth top layer on a solid print.

The picture you see is a 50mmx50mmx1mm square (cube([50,50,1]); in openscad) printed with a .4 nozzle. (5 layers)

For tuning on the problem, I have looked into:

  • z_offset – tried all kinds of values and if I reduce it anymore, it doesn’t squish into the bed and the center part is exactly 1mm – so unlikely to be that.
  • bed level – bltouch is working well
  • extrusion (esteps or rotational_distance) - played with this a great deal and any less and i start to have under-extrusion in the center area.
  • different filament – same with PLA, PETG and ABS
  • Different slicer – same with PrusaSlicer or Cura
  • Different speeds – one on the left was printed at 20mm/s – the right was printed at 150mm/s

I also cant find any guides out there that show this issue. Anybody with some suggestions or threads I can pull?

  • tenzen@lemmy.caOP
    link
    fedilink
    English
    arrow-up
    2
    ·
    edit-2
    1 year ago

    I agree, not just the perimeter but also when it’s going back and forth to fill in the centre area. I’m not sure how to address it – maybe the pressure advance settings LazaroFilm suggested. I’ve also tried printing at a series of different temperatures…

    • de_ninja@lemmy.world
      link
      fedilink
      English
      arrow-up
      1
      ·
      1 year ago

      That’s what I meant, have you tried just decreasing the printing temp by 10 degrees and then printing another square and comparing the result?