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

hmmatos

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

dc42

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.

hmmatos

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

vwegert

Try

M550 PSteam

then run the assistant twice, followed by

M117 Hey Hey-ey Goodbye

(SCNR)