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    Auto bed levelin using 3 independent Z-Axis and Precision Piezo

    Tuning and tweaking
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    • KevinO
      KevinO last edited by

      Hello,

      Iam very new in this forum and not very familiar with die RepRapfirmeware…
      The first Printer i built runs on Marlin and is very stable, the second one runs Repertier and now the third one should run RepRap but i have some issues configurating it...
      I Managed to REmap EXT0 and EXT1 for my Z2 and Z3 and now i would like to install the Precision Piezo.

      Is it possible to level the bed automatically with 3 independent Z Motors?

      In Repertier it is posible and on my second printer it works an looks like this:
      https://www.youtube.com/watch?v=76bUTPKNloM

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      • DjDemonD
        DjDemonD last edited by

        As far as the piezo side of things goes, as long as the sensor is correctly installed and tuned, it will function to provide the data required to adjust the 3 leadscrew motors to level the bed. However I have not set up this system myself as my corexy bed is only supported on 2 smooth rods.

        Others have successfully done this though and I'm sure someone will chime in with how to do it.

        Piezo probes are ideal for this purpose due to being nozzle contact sensors with no offsets.

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        • whosrdaddy
          whosrdaddy last edited by

          Yes this is possible and is described in the documentation:

          https://duet3d.dozuki.com/Wiki/Bed_levelling_using_multiple_independent_Z_motors

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          • KevinO
            KevinO last edited by

            thanks a lot ! those are the lines i was searching for.. where i can define the positions of the 3 independent Z-Motors

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            • whosrdaddy
              whosrdaddy last edited by

              It's all there, read the docs! 😉
              You must create a file called bed.g and use G30 commands to define the lead screw positions.

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              • kraegar
                kraegar last edited by

                The 3 point leveling works very well, just gotta be precise in your leadscrew positions. I routinely get it down under 0.01mm across the bed.

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