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0.8 Nozzle not bad for the first try bt I need your help

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Tuning and tweaking
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  • undefined
    claustro
    last edited by 25 Jan 2022, 00:26

    Hi guys ,
    I am trying a 0.8 nozzle for big print but I am having some problems of perimeter gaps.
    Perimenter and internal gap are separated by abot 0.1mm space
    Any idea how can solve this problem.

    My setting for this print
    PLA
    nozzle 0.8 vulcano
    temperature 220
    extrusion multiplier 1.02
    extrusion width 1.0
    layer eight 0.5
    top solid layer 3
    bottom solid layer 3
    outline perimeter 3

    1643069767427 (Piccola).jpg 1643069767414 (Piccola).jpg

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    • undefined
      Phaedrux Moderator
      last edited by Phaedrux 25 Jan 2022, 04:01

      Are you perhaps exceeding your hot end melt rate?

      https://duet3d.dozuki.com/Guide/Ender+3+Pro+and+Duet+Maestro+Guide+Part+4:+Calibration/40#s177

      See the steps beginning here to find your max extrusion rate. Once you know the max extrusion rate you can find your max speed based on the height and width you want to use.

      Also with larger nozzles you may need to increase the overlap setting and retune pressure advance and retraction.

      Z-Bot CoreXY Build | Thingiverse Profile

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      • undefined
        Touchthebitum
        last edited by 25 Jan 2022, 06:48

        I use 0.8 nozzle size too for large prints. I have this problem too but it seems that acceleration may be modified. Be careful with speed because extruder motor has to provide more speed for the print. So try to lower your print speed 😉

        Sparkcube XL V 1.1 300x300x190, Radds, Raspberry, Keenovo silicone bedheat 220v, Big Booster Extruder, DIY building
        BLV Cube 665mm Direct Drive with Duet3/SBC (RPi 4) Mosquito Magnum/Bond Tech Extruder/Vanadium Nozzle, Keenovo silicone bedheat 220v

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        • undefined
          claustro
          last edited by 25 Jan 2022, 09:41

          @phaedrux Thank you I am in the range / max speed 50mm/s printing at 40 mm/s.
          I am goiong to try overlapp seting and reducing the sped a bit

          undefined 1 Reply Last reply 25 Jan 2022, 09:47 Reply Quote 0
          • undefined
            deckingman @claustro
            last edited by 25 Jan 2022, 09:47

            @claustro Also, if you use pressure advance, disable it or set it to really low value. Any pressure build up that you might see with a 0.4mm nozzle will be much reduced with a 0.8mm nozzle.

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

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            • undefined
              oliof
              last edited by 25 Jan 2022, 13:14

              Depending on your slicer you may increase infill overlap for the holes in the top layer, and tune Z seam settings for the gap at the seam.

              <>RatRig V-Minion Fly Super5Pro RRF<> V-Core 3.1 IDEX k*****r <> RatRig V-Minion SKR 2 Marlin<>

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