Some general questions for setup



  • Hi,

    this is my first post so I would like to introduce my project. After starting with an Anet A8 I decided to build my own (cartesian) printer and selected the Duet 3D WiFi for controlling. Most important parts are already builtup and now I want to finalize the important details.

    In this context I have some questions where you hopefully can help me

    • For z-axis I would like to use two endstops: One at start which is also used for auto bed leveling and the other at the other side. Is it possible to define two endstops for one axis?

    • When using two motors besides the (shared) connector for Z: Is the by M906 selected current for each motor or combined for both?

    • I am using glass bed and a piezo for triggering. So for bed compensation Mesh compensation is not really needed. Isn't there a possibility to use a linear compensation? With only some measure points mesh will cause some oscillation in interpolated bed surface? What are your recommendations?

    Best regards
    Holger


  • administrators

    Welcome to the forum!

    Although it's possible to use 2 Z endstop switches by temporarily creating an additional axis in the homing files, it's easier to use just one and to do side to side levelling using the Z probe to adjust the motors individually. See https://duet3d.com/wiki/Bed_levelling_using_multiple_independent_Z_motors.

    The current set by M906 is per motor.

    You can use mesh levelling with just 4 points near the corners of the bed.



  • Hi,

    thanks for your answers! Regarding the 2nd Z endstop I would like to use it as a safety enhancement, which should also work while printing or other activities. So - there I would have to use a mechanical barrier for this?

    Best regards
    Holger


  • administrators

    Depending on the leadscrew pitch/lead you use, perhaps motor stall detection would be suitable?

    If you do want to use multiple Z endstops, see https://www.duet3d.com/forum/thread.php?pid=10946#p10946 and subsequent posts in that thread.


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