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    Map general PWM-I/O pins on extension header as fan

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    • AndreS
      AndreS last edited by

      Hi,

      is it possible to use PWM capable I/O pins on the extension header that are configured as I/O pins as fans?

      Fan 0 and 1 on my Duet 0.8.5 are in use. I disabled Heater 4 and 5 on the extension header and use them as PWM outputs for 2 more fans, but can't control them thermostatically (only manually with macro). So a mapping as fans would be convenient.

      André

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      • DjDemonD
        DjDemonD last edited by

        Yes this would be useful something equivalent to Arduino's M42 Px command.

        Simon. Precision Piezo Z-Probe Technology
        www.precisionpiezo.co.uk
        PT1000 cartridge sensors NOW IN, just attach to your Duet board directly!

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        • dc42
          dc42 administrators last edited by

          You can already control them with M42 Px. What AndreS is asking is to control them via M106 instead.

          AndreS , I'll add this to the firmware wish list. However, firmware 1.20 is planned to be the last release for the legacy Duets (0.6 and 0.8.5). Of course, if you build the firmware yourself then you can remap the fans to PWM channels as you wish.

          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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          • DjDemonD
            DjDemonD last edited by

            It would potentially be useful to be able to map M106 fan control to ANother pin, provided it was used carefully with appropriate external mosfets/diodes to protect the IO pin.

            Simon. Precision Piezo Z-Probe Technology
            www.precisionpiezo.co.uk
            PT1000 cartridge sensors NOW IN, just attach to your Duet board directly!

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            • AndreS
              AndreS last edited by

              Thanks David,
              it's sad that it could not be implemented to 0.8.5 where only 2 Fan outputs exists.
              I have a DuetWifi in another printer, maybe its of help there sometime.

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