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Mosquito and blobs at the end of perimeter

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Tuning and tweaking
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  • undefined
    SIam
    last edited by 15 Jan 2020, 20:36

    the pics are very unsharp i would say you should calibrate your extruder (over extrusion) and maybe temperature

    Hypercube-Evolution-Hybrid, Piezo Orion, Orbiter
    Duet WiFi 1.02 or later + DueX5
    RepRapFirmware for Duet 2 WiFi/Ethernet 3.4.0beta4 (2021-09-27 11:30:36)
    Duet WiFi Server: 1.26
    Duet Web Control 3.4.0beta4 (2021-09-27)

    undefined 1 Reply Last reply 15 Jan 2020, 20:58 Reply Quote 0
    • undefined
      skayred @SIam
      last edited by 15 Jan 2020, 20:58

      @SIam parts are small so I couldn't focus coreectly, sorry 😞
      but if same extrusion and same plastic worked with different hotend, will the picture actually be different with the new one?

      PS - temperature seems to be okay as the overall surface quality is great

      undefined 1 Reply Last reply 15 Jan 2020, 21:06 Reply Quote 0
      • undefined
        SIam
        last edited by 15 Jan 2020, 21:04

        if you change the filament ... you have to calibrate the extruder (not every filamentis exactly 1.75 mm not every filament is exactly round etc.)

        if you change the hotend you should calibrate the temperature and the extruder

        Hypercube-Evolution-Hybrid, Piezo Orion, Orbiter
        Duet WiFi 1.02 or later + DueX5
        RepRapFirmware for Duet 2 WiFi/Ethernet 3.4.0beta4 (2021-09-27 11:30:36)
        Duet WiFi Server: 1.26
        Duet Web Control 3.4.0beta4 (2021-09-27)

        undefined 1 Reply Last reply 15 Jan 2020, 21:15 Reply Quote 0
        • undefined
          deckingman @skayred
          last edited by 15 Jan 2020, 21:06

          @skayred 0.63 PA is a pretty big number and would indicate that you have a Bowden tube in excess of a metre long. Is this the case?

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

          undefined 1 Reply Last reply 15 Jan 2020, 21:10 Reply Quote 0
          • undefined
            skayred @deckingman
            last edited by 15 Jan 2020, 21:10

            @deckingman nope, it is 400mm. There was another my topic about not-working PA, so it started being really visible only on these high values. But I am pretty sure something is wrong for sure

            undefined 1 Reply Last reply 15 Jan 2020, 21:15 Reply Quote 0
            • undefined
              skayred @SIam
              last edited by 15 Jan 2020, 21:15

              @SIam will try to do but dimensional accuracy at least is okay

              1 Reply Last reply Reply Quote 0
              • undefined
                deckingman @skayred
                last edited by 15 Jan 2020, 21:15

                @skayred Try disabling PA completely - just to see what difference that makes. On a small part with short moves, it's unlikely that you get much of a pressure build up in any case.

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

                undefined 1 Reply Last reply 15 Jan 2020, 21:16 Reply Quote 0
                • undefined
                  skayred @deckingman
                  last edited by 15 Jan 2020, 21:16

                  @deckingman will try tomorrow. What could be an effect? And is 10x10x10mm cube okay or some other shape is better?

                  undefined undefined 2 Replies Last reply 15 Jan 2020, 21:20 Reply Quote 0
                  • undefined
                    deckingman @skayred
                    last edited by 15 Jan 2020, 21:20

                    @skayred Pressure in a hot end builds up over the course of a move. The longer the move, the more pressure will build. Therefore it follows that the effect of pressure will be more noticeable the larger the part.

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

                    1 Reply Last reply Reply Quote 0
                    • undefined
                      Phaedrux Moderator @skayred
                      last edited by 16 Jan 2020, 00:07

                      @skayred said in Mosquito and blobs at the end of perimeter:

                      is 10x10x10mm cube okay or some other shape is better?

                      Try a 100x100x100 cube to get up to speed.

                      Z-Bot CoreXY Build | Thingiverse Profile

                      1 Reply Last reply Reply Quote 0
                      • undefined
                        skayred
                        last edited by 16 Jan 2020, 09:53

                        So I decide to print 20x20 cube just because 100x100 was too long, here is photos (left one without PA, right one with 0.64):

                        photo_2020-01-16_11-49-13 (3).jpg photo_2020-01-16_11-49-13.jpg photo_2020-01-16_11-49-13 (2).jpg

                        I don't see so much difference but the right one looks slightly better. And, most importantly, those results are not as bad as ones from the first post. Next step is to calibrate the temperature, it seems that I need to set it a bit lower

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                        • undefined
                          skayred
                          last edited by 16 Jan 2020, 20:38

                          well, lower temperatures brought no difference. So, I have no idea what else to check/calibrate

                          1 Reply Last reply Reply Quote 0
                          • undefined
                            Phaedrux Moderator
                            last edited by 16 Jan 2020, 21:53

                            What slicer are you using?

                            Z-Bot CoreXY Build | Thingiverse Profile

                            undefined 1 Reply Last reply 17 Jan 2020, 06:05 Reply Quote 0
                            • undefined
                              skayred @Phaedrux
                              last edited by 17 Jan 2020, 06:05

                              @Phaedrux Simplify3d 4.1

                              1 Reply Last reply Reply Quote 0
                              • undefined
                                Phaedrux Moderator
                                last edited by 17 Jan 2020, 16:07

                                Have you seen this guide yet?

                                https://duet3d.dozuki.com/Guide/Ender+3+Pro+and+Duet+Maestro+Guide+Part+4:+Calibration/40

                                It goes through initial calibration of things like the extruder.

                                Your cubes still look a little hot and over extruded, but that could just be due to the fact they are such tiny objects. Try either printing a larger object or print two cubes at once separated on the bed to allow for longer layer times.

                                Z-Bot CoreXY Build | Thingiverse Profile

                                undefined 2 Replies Last reply 18 Jan 2020, 10:58 Reply Quote 0
                                • undefined
                                  3DPMicro
                                  last edited by 18 Jan 2020, 09:13

                                  Since you changed hotends (and nozzle? ) is it possible that the nozzle is not the diameter you think it is? If you extrude into air, what is the diameter of that material and is it consistent?

                                  Duet controlled Lathe, micro mill, 3d printer and 1992 Haas VF2 VMC

                                  undefined 1 Reply Last reply 18 Jan 2020, 10:54 Reply Quote 0
                                  • undefined
                                    skayred @3DPMicro
                                    last edited by 18 Jan 2020, 10:54

                                    @3DPMicro yep, nozzle is brand new e3d 0.4, extrusion is consistent and of the proper diameter. I started thinking, maybe the problem is not in the hotend but in mechanics? When updating the hotend, I slightly changed the configuration of my carriage sliders, they look more or less stable but could that provoke blobs?

                                    1 Reply Last reply Reply Quote 0
                                    • undefined
                                      skayred @Phaedrux
                                      last edited by 18 Jan 2020, 10:58

                                      @Phaedrux that is actually a good idea, last time I calibrated the extrusion rate when I was using AiO EVO hotend that actually has consistent underextrusion

                                      1 Reply Last reply Reply Quote 0
                                      • undefined
                                        skayred @Phaedrux
                                        last edited by 18 Jan 2020, 12:16

                                        @Phaedrux that is quite curious, extrusion width in vase mode was 0.55-0.6, going to try a complex model with 0.87 extrusion multiplier. My extruder is calibrated to be completely accurate, so how overextrusion is even possible?

                                        1 Reply Last reply Reply Quote 0
                                        • undefined
                                          skayred
                                          last edited by 19 Jan 2020, 12:39

                                          Okay, that is even more curious - I decided to experiment with the retraction speed, and lowering speed actually fixed the problem, no idea how is that even possible.

                                          On this photo, I change the retraction speed from 100 to 25 each 5mm, so speeds from 25 to 75 provide best results.
                                          photo_2020-01-19_14-35-33.jpg

                                          undefined undefined 2 Replies Last reply 19 Jan 2020, 17:14 Reply Quote 0
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