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    Tool fan turning off during print

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    • Arakahnundefined
      Arakahn
      last edited by Arakahn

      Hi all,

      Finally recently decided to update to v3 of the firmware, and for the life of me I cannot figure out the following issue:

      I have a simple setup of a single tool with an E3D v6 (tool fan connected to fan0 pins) with a single part cooling fan (connected on the fan1 pins).

      If I'm starting a print, it seems to be using the tool fan like it was the part cooling fan (example, if I print with the part cooling fan off, when the print starts the tool fan turns off).

      Here is my config:

      M308 S1 P"spi.cs1" Y"rtd-max31865" ; configure sensor 1 as thermistor on pin e0temp
      M950 H1 C"e0heat" T1 ; create nozzle heater output on e0heat and map it to sensor 1
      M307 H1 B0 S1.00 ; disable bang-bang mode for heater and set PWM limit
      M143 H1 S285 ; set temperature limit for heater 1 to 285C

      ; Fans
      M950 F0 C"fan0" Q500 ; create fan 0 on pin fan0 and set its frequency
      M106 P0 H1 T50 ; set fan 0 value. Thermostatic control is turned on
      M950 F1 C"fan1" Q500 ; create fan 1 on pin fan1 and set its frequency
      M106 P1 S0 ; set fan 1 value. Thermostatic control is turned off

      Using Cura, Extruder 1 is configured to use Fan Number 1

      2022-02-07 15_20_32-Machine Settings.png

      I realized that 45 minutes in a print last night, I'll spare you the damage details 😕

      dc42undefined 1 Reply Last reply Reply Quote 0
      • dc42undefined
        dc42 administrators @Arakahn
        last edited by dc42

        @arakahn you have gone against our advice, which is to use fan 0 as the print cooling fan in single-nozzle setups and use fan 1 as the thermostatic hot end fan.

        What fan control commands did Cura write into the GCode file?

        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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        • Arakahnundefined
          Arakahn
          last edited by

          Oups! I must've missed that advice 😕 Apologies

          Here is what Cura is generating (still runing v4.6 as latest versions keeps crashing on me).

          M107 P1

          I'll invert the pins see if it resolves it

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          • Arakahnundefined
            Arakahn
            last edited by

            Well problem solved.

            Thank you @dc42 , that was a prime case of an error code18.

            Lesson of the day kids; read the documentation properly and ALWAY follow the devs advice.

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