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    Would be nice to set FAN target speed by RPM instead of PWM

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    • BoAundefined
      BoA @theruttmeister
      last edited by

      @theruttmeister OK. Perhaps You are right. I build a mass flow sensor once, but for 3d printing it might be an overkill. Just looking on how the blowers are made I thought the major difference is RPMs capability.

      dragonnundefined theruttmeisterundefined 2 Replies Last reply Reply Quote 0
      • dragonnundefined
        dragonn @BoA
        last edited by

        @BoA In my opinion they is only one, good 5015 fan - Sunon MF50151VX-A99
        I put it in all my printers and recommend to every one.
        Even that it is 12V only it is worth the hassle to add a step-down to run it.
        It maybe not the quietest at 100% but is super powerful and if you need to be more quite just run it slower.

        Vetiundefined 1 Reply Last reply Reply Quote 1
        • Vetiundefined
          Veti @dragonn
          last edited by

          @dragonn said in Would be nice to set FAN target speed by RPM instead of PWM:

          Sunon MF50151VX-A99

          what about he MF50152VX-1L01C-Q99?

          24V and pwm.

          dragonnundefined BoAundefined 2 Replies Last reply Reply Quote 0
          • theruttmeisterundefined
            theruttmeister @BoA
            last edited by

            @BoA said in Would be nice to set FAN target speed by RPM instead of PWM:

            @theruttmeister OK. Perhaps You are right. I build a mass flow sensor once, but for 3d printing it might be an overkill. Just looking on how the blowers are made I thought the major difference is RPMs capability.

            The original request, setting fan speed in rpm not pwm %, is still a good one!

            Isolate, substitute, verify.

            1 Reply Last reply Reply Quote 0
            • dragonnundefined
              dragonn @Veti
              last edited by

              @Veti said in Would be nice to set FAN target speed by RPM instead of PWM:

              @dragonn said in Would be nice to set FAN target speed by RPM instead of PWM:

              Sunon MF50151VX-A99

              what about he MF50152VX-1L01C-Q99?

              24V and pwm.

              No idea, first time I see that model. But it isn't available outside in regular shops, only on aliexpress. I am buying A99 in a regular electronics store and paying less for that one.

              1 Reply Last reply Reply Quote 0
              • BoAundefined
                BoA @Veti
                last edited by

                @Veti Can I connect MF50152VX-1L01C-Q99 directly to 4pin fan header on duet3? With 24V voltage?

                Vetiundefined 1 Reply Last reply Reply Quote 0
                • Vetiundefined
                  Veti @BoA
                  last edited by

                  @BoA
                  the duet 3 has 4 pin fan connectors for pwm fans.
                  check that the fan voltage is set to vin.

                  BoAundefined 1 Reply Last reply Reply Quote 0
                  • BoAundefined
                    BoA @Veti
                    last edited by BoA

                    @Veti That is clear. My concern was voltage on tacho pin and pwm pin. Well... perhaps only tacho.

                    Vetiundefined A Former User? 2 Replies Last reply Reply Quote 0
                    • Vetiundefined
                      Veti @BoA
                      last edited by

                      @BoA
                      i think the hardware overview makes it pretty clear

                      https://duet3d.dozuki.com/Wiki/Duet_3_Mainboard_6HC_Hardware_Overview

                      6 PWM controllable fan channels. 3 of these support 4 wire fans including tacho reading. These can be run from either the input voltage, from 12V, or from external power for added flexibility. Also one always-on fan connector supplied with VIN voltage.

                      BoAundefined 1 Reply Last reply Reply Quote 1
                      • BoAundefined
                        BoA @Veti
                        last edited by

                        @Veti Ok. I will give it a try soon 🙂

                        1 Reply Last reply Reply Quote 0
                        • A Former User?
                          A Former User @BoA
                          last edited by

                          @BoA said in Would be nice to set FAN target speed by RPM instead of PWM:

                          My concern was voltage on tacho pin and pwm pin.

                          they're generally active low to avoid voltage issues

                          1 Reply Last reply Reply Quote 0
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