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    Heated chamber faults when opening door

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    • cpirius
      cpirius last edited by

      I've recently upgraded to 3.4.0 and am having trouble with my heated chamber config. At first my M307 parameters didn't work at all, I would get a "heating to slowly" fault after a few seconds. I ran auto tune (which took 5+ hours to complete for my heavily insulated chamber...) and changed to the new M307 parameters. Those seem to work great, but have one major problem. If I open the door to get a better look at the print (or whatever) the heater faults in a few seconds. It's impressive that it can be modeled so accurately, but I need a way to loosen the restrictions for the chamber heater.

      How can I adjust the settings so that it wont be so particular about the temp control? The chamber heater really doesn't need to be so accurate or fault for relatively small inconsistencies.

      Thanks!

      dc42 1 Reply Last reply Reply Quote 0
      • Phaedrux
        Phaedrux Moderator last edited by

        I suppose you could add a switch to the door so that when you open it the chamber heater is turned off and re-enabled when it's closed via conditional gcode.

        Z-Bot CoreXY Build | Thingiverse Profile

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        • dc42
          dc42 administrators @cpirius last edited by dc42

          @cpirius you can use the M570 command to increase the permitted temperature excursion. See https://docs.duet3d.com/en/User_manual/Reference/Gcodes#m570-configure-heater-fault-detection. Or do as @Phaedrux suggests.

          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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          • cpirius
            cpirius last edited by

            Thanks @Phaedrux and @dc42 !

            Using a door switch is a clever idea, I may look into that.

            M570 looks like it will work for what I need. Thanks for pointing that out.

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