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    Inconsistent extrusion

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    Tuning and tweaking
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    • Haggan90undefined
      Haggan90 @deckingman
      last edited by

      @deckingman Yes I am, same speed all the way.

      1 Reply Last reply Reply Quote 0
      • themelleundefined
        themelle
        last edited by

        Had the same effect recently.
        Turned out to be a partly-blocked nozzle. Once cleaned, layers returned to look like what they used to be 😉

        Haggan90undefined 1 Reply Last reply Reply Quote 0
        • Haggan90undefined
          Haggan90 @themelle
          last edited by Haggan90

          @themelle I've tried nozzles between 0-4 - 0.8mm and same artifacts no matter what 😃
          All were brand new as well. USing a E3D Volcano.

          deckingmanundefined 1 Reply Last reply Reply Quote 0
          • deckingmanundefined
            deckingman @Haggan90
            last edited by

            @haggan90 Do you see any temperature fluctuations for the hot end? is it a nice straight line? How about your extruder - is it a Titan and maybe suffereing from the dreaded bearing issue?

            Ian
            https://somei3deas.wordpress.com/
            https://www.youtube.com/@deckingman

            Haggan90undefined 1 Reply Last reply Reply Quote 0
            • Haggan90undefined
              Haggan90 @deckingman
              last edited by

              @deckingman Well if I look at the curve in DWC it's a ery stright line, I'm using a 50W heater.
              I got a Bondtech BMG with aproximatly 50cm of capricorn tube, so there's no slipping what so ever.

              deckingmanundefined 1 Reply Last reply Reply Quote 0
              • deckingmanundefined
                deckingman @Haggan90
                last edited by

                @haggan90 I wasn't thinking about the curve fit as such, but rather is the temperature stable during the print or does it fluctuate?

                Good news about the extruder - I use them too and find they are much better than the Titans I used to have (not that any of that helps you).

                Ian
                https://somei3deas.wordpress.com/
                https://www.youtube.com/@deckingman

                Haggan90undefined 1 Reply Last reply Reply Quote 0
                • Haggan90undefined
                  Haggan90 @deckingman
                  last edited by

                  @deckingman I can't say that I see any fluctations in the temperature, but ofc it can have something to do with the temp. But I think it's such a strange behavior...

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                  • Sethipusundefined
                    Sethipus
                    last edited by

                    What sort of printer is that from? The first several lines appear to have the same period, which reminds me of Z-axis leadscrew wobble that I had to deal with on my original cheap cartesian printer, which had leadscrews directly hard-coupled to the stepper motors. Simply swapping out the hard links to those helical spring links made that go away on that printer. Are you seeing this effect on tall towers and whatnot, consistently?

                    Haggan90undefined 1 Reply Last reply Reply Quote 0
                    • Haggan90undefined
                      Haggan90 @Sethipus
                      last edited by

                      @sethipus Hi, I'm using a self-made printer.
                      The printer uses belts for the Z axis, so there's no wobbel on the Z axis at all.
                      I would say it's not very consistent at all.

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                      • Sethipusundefined
                        Sethipus
                        last edited by

                        Is it possible you're using some cheap filament with fairly strongly varying diameter? Maybe if it varies from, say, 1.70 to 1.76mm or whatever over its length that would make enough of a difference in extruded volume to generate these line thickness differences?

                        Haggan90undefined 1 Reply Last reply Reply Quote 0
                        • Phaedruxundefined
                          Phaedrux Moderator
                          last edited by

                          Compare the lines to your gcode preview, do they match where the slicer has tried to hide the seam?

                          Z-Bot CoreXY Build | Thingiverse Profile

                          Haggan90undefined 1 Reply Last reply Reply Quote 0
                          • Haggan90undefined
                            Haggan90 @Sethipus
                            last edited by

                            @sethipus Iv'e tried several diffrent brands with same result.

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                            • DocTruckerundefined
                              DocTrucker
                              last edited by DocTrucker

                              Looks like sections where the printer has either been slowing down because of a minium layer time feature of the slicer or perhaps the oposite where there is a significant slow down in layer time.

                              Do the bands line up with changes of geometry?

                              Try disabling any minimum layer time slow down features on the slicer and just add more parts to slow it down instead.

                              Running 3 P3Steel with Duet 2. Duet 3 on the shelf looking for a suitable machine. One first generation Duet in a Logo/Turtle style robot!

                              Haggan90undefined 1 Reply Last reply Reply Quote 0
                              • Haggan90undefined
                                Haggan90 @Phaedrux
                                last edited by

                                @phaedrux no not really, same result when printing in vase mode as well.

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                                • Haggan90undefined
                                  Haggan90 @DocTrucker
                                  last edited by

                                  @doctrucker Hi,

                                  I've tried printing in vase mode with consistent speed and still the same deflection in the layer lines.
                                  It should be said the the picture is taken in the worst angle possible, if you look at the print straight on you don't see the variations at all.

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                                  • Haggan90undefined
                                    Haggan90
                                    last edited by

                                    Could this has something to do with the fact the I have 50cm ow capricorn bowden tube?

                                    JamesMundefined 1 Reply Last reply Reply Quote 0
                                    • JamesMundefined
                                      JamesM @Haggan90
                                      last edited by

                                      @haggan90
                                      It's quite possible since capricorn tube has tight tolerances and if you don't use high quality filament that itself has tight tolerances it could be binding in the capricorn tube. I tried capricorn tube early on and gave up on it on my Ender 3 and went back to normal white PTFE tubing until I went direct extruder.

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