Error: Calibration failed, computed corrections: nan nan nan nan



  • Hi,
    I'm trying to use the manual bed levelling assistant but I'm getting this error:

    "Calibration failed, computed corrections: nan nan nan nan"

    does anyone have this problem with the last firmware - 2.03 (2019-06-13b2)?

    This is my code:

    config.g

    ; Manual Bed leveling assistant prerequisite
    M671 X35:275:275:275 Y35:35:275:35 P0.2     ; adjusting screws at front left (35,35), front right (275,35), rear right (275,275) and rear left (275,35), thread pitch 0.2mm
    

    bed.g

    M561 ; clear any bed transform
    G28  ; home all axes
    G30 P0 X35 Y35 H0 Z-99999
    G30 P1 X275 Y275 H0 Z-99999
    G30 P2 X275 Y35 H0 Z-99999
    G30 P3 X35 Y275 H0 Z-99999 S4
    

    Changing the last S4 from bed.g to S-1 I get

    G32 bed probe heights: -0.500 -0.100 -0.450 -0.500, mean -0.387, deviation from mean 0.167
    

  • administrators

    The last X and Y coordinates in your M675 command are wrong. This has made 2 of your leadscrew coordinates equal, resulting in a singularity when the matrix is solved for the corrections needed.



  • @dc42
    Thanks for the clarifications, I was doing it all wrong ☹ all my coordinates are wrong.



  • Try

    M550 PSteam
    

    then run the assistant twice, followed by

    M117 Hey Hey-ey Goodbye
    

    (SCNR)


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