IR sensor not triggering Z Home But Triggers Probe

  • i have just received my Mini differential IR sensor and having problems due to conflicting information on how to install

    i have it installed to the Z probe socket on the duet wifi board

    Vin to 3v
    Gnd to Gnd
    Signal to Z Probe In
    Zprobe MOD Unconnected

    Config file
    ; Endstops
    M574 X1 Y2 S1
    M574 Z1 Z0 S0
    M558 P1 X0 Z0 H5 F120 T6000
    G31 P500 X0 Y0 Z1
    M557 X15:185 Y15:260 S20 0

    the light on the board triggers and the Zprobe at untriggered is 0 and on triggered is 537

    but in the end stop hit it is not showing anything just stays at NO

    i have just noticed on a M119
    Endstops - X: not stopped, Y: not stopped, Z: not stopped, Z probe: at min stop

    but on a home all the Z Axis won't stop

    when i click Home All It wont Stop


    ok i think i understand is the IR sensor not a home all endstop?

    as i have put my old one back on and it works but the IR sensor just seems to be for the auto mesh
    or am i wrong

  • administrators

    The IR sensor is a Z probe and as such can be used for various purposes such as Z homing, mesh bed compensation, automatic leadscrew adjustment, telling you how much to adjust the bed levelling screws, and even X homing on some printers. To use it for Z homing, see

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