BLtouch mode (M558 P9) on alternate endstop connector



  • I use BL Touch sensor on some machines including in the field. Wanting to try the new P9 setting as I have had some issues in the past with consistency of probing (touch probe re-deploying and hitting glass mid-probe cycle)

    Problem is that the M558 P9 assumes the BLTouch signal is wired up to the probe connection, while mine is wired up to the E1 endstop.

    Is it possible to get the P9 retract/redeploy behavior on a different end-stop connector? I am not able to update the wiring as many machines are in the field. Firmware/config updates are not an issue.

    If not, could a future parameter be added to the M558 command to independently map the endstop to the probe (rather than being assumed in the P command?) Looking for something similar to the M582 (configure external trigger) command, which allows selection of end stops.

    Here is an example of my current config.g probe section

    M307 H7 A-1 C-1 D-1
    M558 P6 H5 F120 T6000
    G31 P100 X0 Y0 Z1.36

    Any help is appreciated. Thanks!


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