Help needed to remap fan1



  • I had a wire break on my hot end fan and the wires shorted and fan1 port is no longer working. Can I use fan2 for the hot end and how?

    Duet2 maestro and firmware v3

    In advance thank you
    S. Rolin



  • There should be a line in your config.g looking something like:

    M950 F1 C"fan1" Q500 ; create fan 1 on pin fan1 and set its frequency

    you can change "fan1" to "fan2" and it will use that connector instead.



  • @bondus thank you I will try that.



  • @bondus That did not work, did i miss somthing?

    ; Heaters
    M308 S0 P"bedtemp" Y"thermistor" T100000 B4138 ; configure sensor 0 as thermistor on pin bedtemp
    M950 H0 C"bedheat" T0 ; create bed heater output on bedheat and map it to sensor 0
    M143 H0 S120 ; set temperature limit for heater 0 to 120C
    M307 H0 B0 S1.00 ; disable bang-bang mode for the bed heater and set PWM limit
    M140 H0 ; map heated bed to heater 0
    M308 S1 P"e0temp" Y"thermistor" T100000 B4138 ; 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
    M143 H1 S280 ; set temperature limit for heater 1 to 280C
    M307 H1 B0 S1.00 ; disable bang-bang mode for heater and set PWM limit

    ; Fans
    M950 F0 C"fan0" Q500 ; create fan 0 on pin fan0 and set its frequency
    M106 P0 S0 H-1 ; set fan 0 value. Thermostatic control is turned off
    M950 F1 C"fan2" Q500 ; create fan 1 on pin fan1 and set its frequency
    M106 P1 S1 H1 T45 ; set fan 1 value. Thermostatic control is turned on

    ; Tools
    M563 P0 D0 H1 F0 ; define tool 0
    G10 P0 X0 Y0 Z0 ; set tool 0 axis offsets
    G10 P0 R0 S0


  • Moderator

    @S-Rolin said in Help needed to remap fan1:

    That did not work, did i miss somthing?

    Did you also move the fan port for the hotend fan to Fan2 port?



  • Yes i did, mabye it is blow to 😞


  • Moderator

    Have you checked the fan fuse?
    Does the fan work when connected to the always on fan port?



  • @Phaedrux yes it does, that what i've done to keep the printer running. where would i find the fan fuse?

    sorry for alle the questions.

    /Soren


  • Moderator

    Sorry, I see now that you're using a Duet Maestro, so no replaceable fan fuse.

    Since this is the hotend fan, you could still use the always on fan port. If fan port 1 and 2 are no longer working.

    Actually. the fan 2 block has it's own voltage select jumper, how is it set? Perhaps it's not set properly and that's why your Fan2 port isn't working as expected.

    https://duet3d.dozuki.com/Wiki/Duet_2_Maestro_Wiring_Diagram


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