UNSOLVED Working on wiring BL touch and now hotend fan runs continuous.



  • I recently switched my printer over from a 12v PSU to a 24v PSU and after all the rewiring that I had done there was a problem with my BL Touch. I was trying to trace down where the problem was with my BL touch and while checking the wires for the 4 or 5th time I decided to try moving the heater pin being used from 7 to 3.. but this time I neglected to turn the power off when I switched the pin, 😖 and now my hotend fan runs at all times as soon as the printer is turned on.

    Turns out there was an intermitent wire connection between the wire and pin of the connector that I am using to hook up the BL Touch that was causing the issue. I got that sorted out and it is working correctly now.

    Running Duet Wifi V1.01 . I am hoping I didn't break something but who knows. Any suggestions on how to check if this is broken?
    I was getting ready to pull the trigger on a Duex5 and larger display from Filastruder but before I do want to get this straightened out first in case I need to order a new main board.

    Fan section in cofig for ref.

    ;Fans*******************************************************************
    M106 P0 S0 I0 F500 H-1 ; Set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned off

    M106 P2 S1 I0 F500 H1 T60 ; Set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned on

    M106 P3 S0 I0 F500 H-1


  • Moderator

    The config looks correct. I think you've blown something.

    Are the fans also 24v?



  • No the fans are 12v, I have them running through a buck converter wired per
    https://duet3d.dozuki.com/Wiki/Connecting_and_configuring_fans#Section_Using_12V_fans_when_VIN_is_24V
    #1


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