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  1. #1
    Staff Engineer old man emu's Avatar
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    Oct 2013
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    Narellan, New South Wales, Australia
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    912

    What is G29 used for?

    I haven't quite reached the point where I need to go into the G29 command, so I haven't been reading that threat. However, can someone give me a simple outline of what G29 does, and why we want to zero in on it?

    Old Man Emu

  2. #2
    Super Moderator Roxy's Avatar
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    Apr 2014
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    Lone Star State
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    G29 is like the G28 command except on steroids. It probes multiple points on the bed and then uses that information to find the normal vector to the X & Y axis. It produces a 3 x 3 bed correction matrix that can be used by all the movement routines. When a specified coordinate (vector) in the GCode is multiplied by the correction matrix it produces a new coordinate in the new space that is properly located given the bed might not be flat.

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