I have some very consistent issues with warping when printing ASA/ABS, which is really annoying since I’m trying to print my voron parts. It’s not warping massively, but enough to mess things up.

I print with these general settings, on a textured PEI flex-plate.

  • heated chamber @ 45-47C (can’t go much higher)
  • bed temp @105C
  • first layer 255C, other layers 245C
  • fan off, unless it’s an overhang >=50% or layer time is <10s. Fan maxes out @70% unless bridging.
  • speed 200/120 mm/s inner/outer walls
  • first layer 50mm/s, 80mm/s infill

I’ve tried both with my regular Z-offset which creates a good uniform first layer, and slightly lower to kind of push it more on to the plate (but worse looking)

  • I’ve cleaned the plate with pure IPA
  • I’ve tried glue stick
  • I’ve tried brim both skirts/mouse ears, which help but don’t eliminate it. (5mm, 0.15mm space)

ABS seems to be a little easier to print than the ASA. I’m using filament from Polymaker

  • @[email protected]English
    6•1 month ago

    Yikes you should consider replacing that screw terminal with a new one. With all the charring, it’s possible that it’s not making a great connection between the board and wire, which causes higher resistance and the terminal to heat up further.

    • @[email protected]English
      1•1 month ago

      I have more terminals to swap in but I’ll be replacing the board anyway. The other identical board never did this but I also never tried pushing the limits on that one.

        • @[email protected]English
          2•1 month ago

          I had an issue I caught early when I swapped my prusa from a Rambo to an skr mini, used the same power wires which didn’t have ferrules, I got “lucky” that the power supply shut itself down, one wire had worked itself a bit loose, enough to potentially arc.

          I’ve replaced everything with new 14 awg wire with solid ferrules and I inspect semi regularly, I trust my crimps here but I don’t mess around with potential fire hazards. I think there’s a tendency to think, oh it’s low voltage, it’s fine, but there’s a lot of energy going through those wires, treat it with the same respect you would mains power. Take your time, double check everything, and invest in good crimping tools.