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    Bad Benchy Bottom

    Scheduled Pinned Locked Moved
    Tuning and tweaking
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    • SIamundefined
      SIam
      last edited by

      hi,
      i would say your printig temperature is to hight and/or your component cooling is to low, which material on which temperatur you try to print?

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      • wannathermalundefined
        wannathermal
        last edited by

        Slam
        Thanks for the quick response. I have found my problem, my Z axis threaded rods have some bad threads. I will replace them and move on!

        Corexyundefined 1 Reply Last reply Reply Quote 0
        • Corexyundefined
          Corexy @wannathermal
          last edited by

          @wannathermal said in Bad Benchy Bottom:

          Slam
          Thanks for the quick response. I have found my problem, my Z axis threaded rods have some bad threads. I will replace them and move on!

          What sort of rods are they?

          That may be an issue, but there's likely some temp and extrusion issues in play here too. I'd really have a close look at your extruder esteps and extrusion multiplier as well.

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          • supernovaeundefined
            supernovae
            last edited by

            I have this same issue in Cura with benchy...

            20200228_230819763_iOS.jpg

            this one is more pronounced than others i did, but the top part prints beautifully.

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            • supernovaeundefined
              supernovae
              last edited by

              here is a less pronounced one - (printing at finer resolution)

              20200227_160730761_iOS.jpg

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              • supernovaeundefined
                supernovae
                last edited by

                I've printed test cubes and they look fine.. printing a tall 20x20x400mm tower in vase mode right now to eliminate screw problems

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                • supernovaeundefined
                  supernovae
                  last edited by

                  Prusa slicer isn't anywhere near as pronounced with defects.

                  20200228_233724054_iOS.jpg

                  Trying another with lower temps to see if it is too hot

                  Phaedruxundefined 1 Reply Last reply Reply Quote 0
                  • Phaedruxundefined
                    Phaedrux Moderator @supernovae
                    last edited by

                    @supernovae Probably fan speed settings differences between prusaslicer and cura. The bow is a very steep angle and needs a lot of cooling. The benchy is so tiny that it's prone to overheating. Try printing two at once in cura and I bet the bow will look much better.

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                    • supernovaeundefined
                      supernovae
                      last edited by

                      I checked cura, its set to be 100% fan on layer 2 - but it doesn't seem to be doing that. I'm going to try another benchy now in cura and see if i hear the fan at 100% or see if it gets louder progressively..

                      i guess i could just also read the gcode and see what the fan is set to as well heh. off to try that too

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                      • supernovaeundefined
                        supernovae
                        last edited by

                        Just to update, i swapped out cooling ducts - what a huge difference. I also tossed out this white PLA and used another brand and its now printing perfectly. I had to print the old white much hotter than i thought necessary to avoid jams but in doing so it stressed out a bad cooler. fixed both and happy now 🙂

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