Troubles with fans on heater ports



  • Hello,

    I am trying to set up my fans and LEDs. I made a small board with mosfets for the expansion connector. In my config file I have:

    M307 H2 A-1 C-1 D-1 ;disable heaters
    M307 H3 A-1 C-1 D-1 ;
    M307 H4 A-1 C-1 D-1 ;
    M307 H5 A-1 C-1 D-1 ;
    M307 H6 A-1 C-1 D-1 ;
    M307 H7 A-1 C-1 D-1 ;

    ; Fans
    M106 P0 A2 S0 I0 F500 C"Part" ;
    M106 P1 S0 I0 F500 H1 T45 C"Hotend" ;
    M106 P2 A3 S0 I1 F500 H104 T45:50 C"PSU" ;
    M106 P3 A4 S0 I1 F500 H100:101:102 T45:65 C"BOARD" ;
    M106 P4 A5 S0 I1 F500 C"LED1"
    M106 P5 A6 S0 I1 F500 C"LED2"
    M106 P6 A7 S0 I1 F500 C"LED3"

    The problem I am having is that whenever I set the fan speed for the lets say LED1 fan it only works for a moment and then switches back to full speed. I don't think its a problem with my board because i can see the same behaviour on the output pin if i measure with an oscilloscope. the same thing happens on the PART fan which is connected to the Heater2 port. Its as if something is reseting the fans to full speed periodically.
    Any help with this would be appreciated. Thanx



  • OK, I figured it out. The config-override.g file was setting up the heaters again after i disabled them in the config file.


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