Duet WiFi Can't get BLTouch to work after Upgrade to FW 3.2.2

  • Hey Guys, i am struggling to get my bltouch working ( again ) and hope you can help.

    I configured the probe as follows :config.g

    ; Z-Probe
    M950 H3 C"nil"
    M950 S0 C"exp.heater3" ; create servo pin 0 for BLTouch
    M558 P9 C"^zprobe.in" H5 F150 T6000 ; set Z probe type to bltouch and the dive height + speeds
    G31 P500 X20.14 Y29.88 Z1.5 ; set Z probe trigger value, offset and trigger height
    M557 X30:240 Y30:260 S40 ; define mesh grid

    When i power on the printer the probe does it's POST pin down and up thing.
    But I don't get any response from M280 P0 S10

    I wired the sensor this way : acede04a-e8b7-42ab-89da-a88cbf21a20b-grafik.png

    The BLtouch is an old version with metal pin. Strange thing is, on my other printer i have the same wiring and configuration but with FW Version 3.1.1 and the probe works flawlessly.

  • @Protoberance
    Try switching to exp.heater7.


    M950 H3 C"nil"

    Is not neccesary for that release.

  • DAMN ! How should i've known 🙂 Thank you so much, the pin is moving now. Let's check if can produce a heatmap.

Log in to reply