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    Layer fan not working

    Duet Hardware and wiring
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    • COMMLXIV
      COMMLXIV last edited by COMMLXIV

      Hi,
      I've just recently finished a rebuild of my printer, the major change is a 24V high pressure layer fan (BerdAir 24V). The fan takes a PWM signal from the Duet but is powered straight from the PSU. It works flawlessly from the main control but seems to be having issues when instructed by GCode (see picture), basically it won't run during an actual print. If I start it manually it runs for about one second before being stopped.

      http://tinypic.com/r/30cq547/9

      Any ideas on what's upsetting Duet?

      T3P3Tony 1 Reply Last reply Reply Quote 0
      • T3P3Tony
        T3P3Tony administrators @COMMLXIV last edited by

        @commlxiv how do you mean the fan runs from the main control but not during a print? If you use
        M106 Pnn Svv where nn is the fan number and vv is the speed what happens?

        www.duet3d.com

        1 Reply Last reply Reply Quote 0
        • COMMLXIV
          COMMLXIV last edited by

          Tried that just now, it works fine. But during a print the fan doesn't run and the Duet control screen just shows a series of error messages.

          T3P3Tony 1 Reply Last reply Reply Quote 0
          • T3P3Tony
            T3P3Tony administrators @COMMLXIV last edited by T3P3Tony

            @commlxiv what command worked exactly? Compare that to what is actually in the gcvode file you are trying to print.

            From the image it looks like its sending M106 with no parameters?

            www.duet3d.com

            1 Reply Last reply Reply Quote 0
            • COMMLXIV
              COMMLXIV last edited by

              Interesting, the GCode from KISSlicer just seems to send M106 then M107. I guess the slicer software needs to be configured to send a proper M106 command with parameters?

              1 Reply Last reply Reply Quote 0
              • COMMLXIV
                COMMLXIV last edited by

                I found a setting in KISSlicer, ticked a box for "Fan can do PWM" and added "P0" to the fan on command to specify the layer fan. I'll see how it goes but it seems like the right track. Thanks for the help!

                T3P3Tony 1 Reply Last reply Reply Quote 1
                • T3P3Tony
                  T3P3Tony administrators @COMMLXIV last edited by

                  @commlxiv Thsat sounds very likely to be the issue!

                  www.duet3d.com

                  1 Reply Last reply Reply Quote 0
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