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    Obvious improvement from pressure advance on my direct extruder

    Tuning and tweaking
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    • Shen
      Shen last edited by

      I just want to share my experience with you guys. Today I decided to try pressure advance, and I see obvious improvement on my flexion direct extruder.
      I printed a 70mm calibration tower. Here is the how I setup my test:
      0 to 10mm: 0
      10 to 20mm: 0.01
      20 to 30mm: 0.02
      30 to 40mm: 0.04
      40 to 50mm: 0.08
      50 to 60mm: 0.16
      60 to 70mm: 0.32
      Here is the result: https://www.dropbox.com/s/dstatwv0jja359z/IMG_0744.JPG?dl=0
      It's very obvious that 0.04 gives me the best result. Right now I'm printing another tower using values from 0.03 to 0.06 to find a more precise value.
      This is the model I used for this test: http://www.thingiverse.com/thing:729703

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      • dc42
        dc42 administrators last edited by

        Thanks for sharing that result. That's the best demonstration of the effect of pressure advance that I've seen. I'll try printing that model on my printers.

        What perimeter printing speed did you use, and did you specify inside-out or outside-in perimeters?

        Duet WiFi hardware designer and firmware engineer
        Please do not ask me for Duet support via PM or email, use the forum
        http://www.escher3d.com, https://miscsolutions.wordpress.com

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        • Shen
          Shen last edited by

          The perimeters are printed at 75mm/s. I'm printing inside out. Also I used 0.42 extrusion width with 3 perimeters, the print is almost 100% filled, not sure if that helps magnifying the effect.

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          • deckingman
            deckingman last edited by

            That looks to be a very good way of tuning pressure advance. Thanks for sharing.

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

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