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    Fast Response Part cooling fan

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    • bubblevisorundefined
      bubblevisor
      last edited by

      I am finding with higher temperature chambers printing bridges with ABS is becoming difficult. Has anyone else experienced and solved this?? Is this just a inherent side effect?

      Here's one thought: Slicers do a good job facilitating increased cooling settings for bridging features and ramps up the fan appropriately. HOWEVER, I believe often the printer part cooling fan cannot respond/spool up quick enough to fully utilise/capitalise on this control feature. This photo shows a part that used to have perfect bridges when the chamber was 55C, but now at 72C, bridges are poor. Can a closed loop controlled fan be employed to provide faster spooling up and therefore deliver cooling as soon as its needed?

      What about the bird air cooling method? Would that be useful for this issue?

      bridge.jpg

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      • MintyTreborundefined
        MintyTrebor
        last edited by

        Are you already utilising the features available in some slicers specifically for managing fan ramp-up? ... eg superslicer:
        ab95b296-99b5-4741-a23f-21f8ff2f55bd-image.png

        NodeDSF - Native Node-Red integration with Duet boards.
        BtnCmd - Customise DWC with user defined buttons/layouts/panels (DWC Plugin)
        ReleaseMgr - Duet update info inside DWC.
        Repo

        bubblevisorundefined 1 Reply Last reply Reply Quote 0
        • bubblevisorundefined
          bubblevisor @MintyTrebor
          last edited by

          @mintytrebor No, is this available in prusaslicer?

          MintyTreborundefined 1 Reply Last reply Reply Quote 0
          • MintyTreborundefined
            MintyTrebor @bubblevisor
            last edited by

            @bubblevisor Sorry I don't use it. But Superslicer is based on PrusaSlicer so maybe... Some-one else here will know I'm sure.

            NodeDSF - Native Node-Red integration with Duet boards.
            BtnCmd - Customise DWC with user defined buttons/layouts/panels (DWC Plugin)
            ReleaseMgr - Duet update info inside DWC.
            Repo

            bubblevisorundefined 1 Reply Last reply Reply Quote 0
            • bubblevisorundefined
              bubblevisor @MintyTrebor
              last edited by

              @mintytrebor The option for kickstarting the fan is not in prusaslicer, however I wonder is it already has been employed behind the scenes. Does superslicer have this feature enabled as a default?

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              • MintyTreborundefined
                MintyTrebor @bubblevisor
                last edited by MintyTrebor

                @bubblevisor In SuperSlicer its available in Printer Settings - General (With Expert or Advanced view enabled). It is a default feature, but not enabled by default (defaults are zero).

                I think printer profiles/configs are compatable between the two slicer skews, so you could always give Super Slicer a try as another option.

                NodeDSF - Native Node-Red integration with Duet boards.
                BtnCmd - Customise DWC with user defined buttons/layouts/panels (DWC Plugin)
                ReleaseMgr - Duet update info inside DWC.
                Repo

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                • whosrdaddyundefined
                  whosrdaddy
                  last edited by

                  Yes it is an inherent side effect.
                  There are some options though.
                  a) let the heater blow constantly air at the printed layer (not easy do this consistent), I believe I saw one concept here in the forums but can't find it atm
                  b) berd air (this works but to get it 100% dialed in is not easy as you really need to aim the air just under the nozzle and make sure you do not cool other parts of the print as this will lead to thermal stress)
                  c) use support material (the better option), if you have 2 independent heads or a toolchanger you even have the option to print your support in another material (like pve or pla)
                  I print all my ABS prints with full supports and while it is a bit tedious to remove the support material, it simply delivers the best prints.

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                  • oliofundefined
                    oliof
                    last edited by

                    The speedboaters found certain Sanyo Denki 4028 fans to be quite fast to react. Other fans in this form factors can take up to two seconds to get up to speed. So you may have some luck trying quality fans even in other form factors.

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

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                    • bubblevisorundefined
                      bubblevisor
                      last edited by

                      Do 3 wire fans (with RPM sense) provide a faster response and better RPM fidelity?

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                      • bubblevisorundefined
                        bubblevisor
                        last edited by bubblevisor

                        For ideal printing conditions you want a hot chamber but cold, focussed cooling air.

                        Perhaps I can use a low volume flowrate, tightly focussed, cold air source berd air setup. So the inlet is drawn from outside the chamber. Does anyone know the volume flowrate of and effective berd air system? I'm concerned it will overly cool my passively heated chamber.

                        3DPMicroundefined 1 Reply Last reply Reply Quote 0
                        • 3DPMicroundefined
                          3DPMicro @bubblevisor
                          last edited by

                          @bubblevisor I thought about focused cooling at one point. Using compressed air (from an air compressor) and a solenoid seemed like it would be worth a try. If you already have a compressor its pretty simple from there.

                          Duet controlled Jet Lathe, scratch built micro mill and 3d printer. 1992 Haas VF2 VMC retrofit

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