Fan not staying disabled



  • I am designing a part cooling adapter. In this process I have a fan connected but until my design is finished I set override the fan value to 0%. I have however noticed that the fan sometimes starts ramping up before the Duet realizes it should keep it at 0% and stops it again.

    This seems rather incorrect behavior to me.


  • administrators

    Please provide details instructions for how to reproduce this



  • I believe the override is only sent by DWC when it get a response from the Duet.
    If override is selected and the reported fan speed is not the same, then it will issue the command.
    Therefore the fan will always start by the running gcode before it's stopped by DWC


  • administrators

    When you connect DWC, it sets the fan slider to the value reported by the Duet, and you can change it from there. If you want to prevent the fan turning on at all then there are better ways to achieve this than relying on connecting DWC, for example by mapping to an unused fan in the tool definition.



  • @dc42:

    Please provide details instructions for how to reproduce this

    I have not found a set pattern yet. As soon as I can easily reproduce the issue I will post.

    @dc42:

    When you connect DWC, it sets the fan slider to the value reported by the Duet, and you can change it from there. If you want to prevent the fan turning on at all then there are better ways to achieve this than relying on connecting DWC, for example by mapping to an unused fan in the tool definition.

    I am not using this as a permanent fan disable, just while I designing/printing my new fan mount. The slider seems like a simple way to achieve what I want, without changing my slicer/config files.


 

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