Navigation

    Duet3D Logo

    Duet3D

    • Register
    • Login
    • Search
    • Categories
    • Tags
    • Documentation
    • Order

    MCU Temp controlled fan, config issue?

    Duet Hardware and wiring
    2
    3
    865
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as topic
    Log in to reply
    This topic has been deleted. Only users with topic management privileges can see it.
    • janjoh
      janjoh last edited by

      So, I had an old discussion about this ( https://forum.duet3d.com/topic/4531/allow-me-to-introduce-project-full-metal-delta/14 ).

      Now we've had a bit of a heat wave here, and I am starting to see 50-60C MCU temp when doing long prints, especially with ABS given bed temperature.

      So, I thought i would wire this up. But, not really working. I have connected the fan per the enclosed screenshot, and i have sent

      M106 P2 H100:101 T45:55 L0.3

      But the fan seem to be "always full", despite reporting MCU temperature: min 32.5, current 34.1, max 36.2

      If i ground the PWM wire, the fan stops. So, What may I be missing here? Fan jumper set for Vin.

      0_1528624723104_Capture.PNG

      1 Reply Last reply Reply Quote 0
      • dc42
        dc42 administrators last edited by dc42

        When using 4-wire fans you need to invert the PWM control signal, using parameter I1 in the M106 command.

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

          Oh.. Or rather DOH...
          Thank you.

          1 Reply Last reply Reply Quote 0
          • First post
            Last post
          Unless otherwise noted, all forum content is licensed under CC-BY-SA