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    Recommendation on Duet Part Cooling Issue

    Scheduled Pinned Locked Moved
    Duet Hardware and wiring
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    • jrwaters2undefined
      jrwaters2 @Phaedrux
      last edited by

      @Phaedrux can't wait to try the Sunon.

      Based on what you all have said, I ordered a few Mosfets and there is a little computer repair shop near here that I'm going to talk to.

      1 Reply Last reply Reply Quote 0
      • jrwaters2undefined
        jrwaters2 @jrwaters2
        last edited by

        @jrwaters2 Carriage.jpg Carriage Fans Removed.jpg

        Here is the carriage configuration. I think heat and angles shouldn't be a problem.

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        • jrwaters2undefined
          jrwaters2 @Phaedrux
          last edited by

          @Phaedrux Struggling to find any Sunon 24v blowers in stock :-(. I'll keep looking. But, the blowers at digikey seem like a notch up from what I've been using so, if I can't find a 24v Sunon, I'll probably try one of these:

          https://www.digikey.com/en/products/filter/fans/dc-brushless-fans-bldc/217?s=N4IgjCBcpgLFoDGUBmBDANgZwKYBoQB7KAbXAFZyAmADggF0CAHAFyhAGUWAnASwDsA5iAC%2BBWADYEIZJHTZ8RUiFgAGAOxUAzDRDiN29XpUGt5Y2s1ap42GdXn9VrRdPwn2qsYkBOcvZBGEFZ2Lj4hUQJ1H1VpWXlcAmJIMi0qVVgqIwI0jOsLdUktWJz0u0cQXLtdIJDITh4BYRExEHNoYKgwZiYoKnIWoA

          mrehorstdmdundefined 1 Reply Last reply Reply Quote 0
          • mrehorstdmdundefined
            mrehorstdmd @jrwaters2
            last edited by mrehorstdmd

            @jrwaters2

            If you look at page 11 of 14 in the linked pdf file (@Phaedrux post), item 7 specifically says not to use PWM on either + or ground to control speed.

            I recall seeing something a while back about the Sunon fans with mag-lev bearings not working well with variable speed via PWM. These fans have something called "vapo bearings".

            https://drmrehorst.blogspot.com/

            Phaedruxundefined 1 Reply Last reply Reply Quote 0
            • Phaedruxundefined
              Phaedrux Moderator @mrehorstdmd
              last edited by

              @mrehorstdmd And yet it works perfectly well down to about 15% speed.

              Z-Bot CoreXY Build | Thingiverse Profile

              jrwaters2undefined 1 Reply Last reply Reply Quote 0
              • jrwaters2undefined
                jrwaters2 @Phaedrux
                last edited by

                @Phaedrux and @mrehorstdmd this is part of what I love about 3d printing. There is as much devil and as much detail as you could ever want . . .

                jay_s_ukundefined 1 Reply Last reply Reply Quote 0
                • jay_s_ukundefined
                  jay_s_uk @jrwaters2
                  last edited by

                  @jrwaters2 some sunon fans don't play well with PWM and are either on or off. I believe the feature is "auto restart" and the fan reboots if it's not spinning when it thinks it should. Essentially you need a sunon without a letter A at the end of the model number

                  Owns various duet boards and is the main wiki maintainer for the Teamgloomy LPC/STM32 port of RRF. Assume I'm running whatever the latest beta/stable build is

                  jrwaters2undefined 1 Reply Last reply Reply Quote 1
                  • jrwaters2undefined
                    jrwaters2 @jay_s_uk
                    last edited by

                    @jay_s_uk that is extremely helpful - thank you! Most 24v Sunon's are out of stock. I did find one from Mellow on Ali Express that claims to be a genuine Sunon and even has information on how to tell a genuine from a fake. Its the same price as from DigiKey but they have in stock

                    https://www.aliexpress.us/item/2255800678887752.html?spm=a2g0o.cart.0.0.7ecd38daMmPAYm&mp=1&gatewayAdapt=glo2usa&_randl_shipto=US

                    73debcdc-cc34-4e25-877f-1b8fd33cd6c4-image.png
                    I was going to order from someone like DigiKey or Filastruder or Matter Hackers but that doesn't seem to be an option at the moment.

                    Interestingly, the Mellow one states "Upgrade: New fan support voltage to adjust wind speed"

                    jay_s_ukundefined 1 Reply Last reply Reply Quote 0
                    • jay_s_ukundefined
                      jay_s_uk @jrwaters2
                      last edited by

                      @jrwaters2 the mellow ones are ok as far as I'm aware.

                      Owns various duet boards and is the main wiki maintainer for the Teamgloomy LPC/STM32 port of RRF. Assume I'm running whatever the latest beta/stable build is

                      jrwaters2undefined 1 Reply Last reply Reply Quote 0
                      • jrwaters2undefined
                        jrwaters2 @jay_s_uk
                        last edited by

                        @jay_s_uk thanks - I ordered one today so will see how it goes.

                        1 Reply Last reply Reply Quote 1
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