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    Help to understand what is going on...

    Tuning and tweaking
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    • briskspirit
      briskspirit last edited by briskspirit

      Printer type: Cartesian (Replicator/FlashForge clone)
      DuetWifi 1.04 FW 2.02
      Material: PETG, temp 230C, bed 80C first layer, after - 70C
      Slicer: Simplify3D 4.1.1
      Layer height 0.2mm, 2 outlines, 3/3 bottom/top layers, speed 50-70(tried both), outlines/infill/bridges 71% from main speed.
      Print fan ON
      Pressure Advance is OFF

      Jerk XY 600, accel XY 2000 and 600(tried both)

      Everything prints good, good retractions, good bridges and etc but getting the nose of 3Dbenchy like melting... If i try 220C nose will be a bit better but layer adhesion is almost gone. And nose melting do not depend from bed temp.

      0_1546536734871_IMG_1802.jpg

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      • R3play
        R3play last edited by

        What kind of part cooling fan do you have?
        I'm thinking that it can't reach or has a difficult time to reach that spot and cool it.

        briskspirit 2 Replies Last reply Reply Quote 0
        • briskspirit
          briskspirit @R3play last edited by

          @r3play I have made it for turbofan. Maybe you could be right and I need to change it's design...

          0_1546539456307_Capture.PNG

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          • briskspirit
            briskspirit last edited by

            Ideas how to improve? I only have 5mm of clearance to make that fan, so it is so "flat"

            0_1546539982868_Capture.PNG

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            • Wyvern
              Wyvern last edited by

              Maybe ditch the side vents and just make two large slits on the opposite ends.

              briskspirit 1 Reply Last reply Reply Quote 1
              • briskspirit
                briskspirit @R3play last edited by

                @r3play bulls eye! Thanks for your idea 🙂 Redone my cooling fan and now everything is good even at 70mm/s with PETG 🙂

                R3play 1 Reply Last reply Reply Quote 0
                • briskspirit
                  briskspirit @Wyvern last edited by

                  @wyvern This worked:

                  0_1546559686111_Capture.PNG

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                  • R3play
                    R3play @briskspirit last edited by

                    @briskspirit Awesome to hear!
                    It was a wild guess from my side, but it seems I was right 😄

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                    • Wyvern
                      Wyvern last edited by

                      My ft5 was useless with one 360 blower. It would cool the nozzle so much it would error or the layers were like stacks of straw.

                      briskspirit 1 Reply Last reply Reply Quote 0
                      • briskspirit
                        briskspirit @Wyvern last edited by

                        @wyvern Mmm... explain please. Which one are you using now?

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                        • Wyvern
                          Wyvern last edited by

                          I was using a backpack blower on the stock hotend which was too high on the block. Someone made a modified one for the Volcano hotend and that worked perfectly, I have since switched to a MK10 hotend and now use a Thorped turbine cooler that works well, however because I had to mirror the part, I couldn't use the stock fan mounting position, I Macgyvered it with some blue tack- hey, 100 hours later and it's still firmly attached.

                          One day I will design my own, but my cad skills are still pretty limited.

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