SOLVED BLTouch Works on power on but not with any commands



  • I am using a Duet Maestro and a genuine Bltouch. I did not originally have any issues getting the Bltouch setup. Suddenly it stopped deploying. At first it would only fail to deploy when on the far side of the print area, it would go through the first couple probes of the mesh probing cycle, and fail to deploy when it got to the far side of the bed. I thought it was a mechanical issue. So I re-wired the connection and made sure to give it plenty of strain relief. Now the bltouch is only deploying when the board gets power. It goes through its test cycle without giving the blinking red light so I assume everything with the wiring is ok.

    My config: https://github.com/kuhner/ratrig_idex_config


  • Moderator

    In my maestro config I have M950 S0 C"^zprobe.mod" so try adding the ^ to the servo control pin.

    It also sounds like an intermitent connection due to the positional nature of it, but if you've already replaced the wiring and verified continuity...



  • @kuhner1 said in BLTouch Works on power on but not with any commands:

    the bltouch is only deploying when the board gets power. It goes through its test cycle without giving the blinking red light so I assume everything with the wiring is ok.

    Well there are three wires on the connector that feeds power.

    If the power and ground connections are good but the "deploy" connection is not the probe will self test on power up but will not deploy when commanded.

    The behavior you described suggests the "deploy" wire is faulty.

    Frederick



  • @Phaedrux M950 S0 C"^zprobe.mod"

    I will try this again. That is actually what I had orgininally. I changed it trying to troubleshoot this issue.



  • @fcwilt said in BLTouch Works on power on but not with any commands:

    @kuhner1 said in BLTouch Works on power on but not with any commands:

    the bltouch is only deploying when the board gets power. It goes through its test cycle without giving the blinking red light so I assume everything with the wiring is ok.

    Well there are three wires on the connector that feeds power.

    If the power and ground connections are good but the "deploy" connection is not the probe will self test on power up but will not deploy when commanded.

    The behavior you described suggests the "deploy" wire is faulty.

    Frederick

    @fcwilt Helpful info ty, do you know which wire is the "deploy" wire?


  • Moderator

    I believe it's the yellow wire that goes to the zprobe.mod pin.



  • @Phaedrux @fcwilt Thank you both. This has been resolved. It was the "deploy" wire. Surprisingly it wasn't actually my wiring, although it may have been my abuse that caused it. The orange deploy wire somehow had a broken connection. Visually it looked fine but the multi-meter said otherwise. Cut soldered etc and it works.


  • Moderator

    Glad you figured it out.


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