Uploaded October 2023 | Updated September 2026, 2 weeks ago

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Test your machine for squareness and correct in software or... tram again!

I have been using this test for a few years now and it's fast and easy.

thingiverse.com/thing:6164754
klipper3d.org/Skew_Correction.html
marlinfw.org/docs/gcode/M852.html
Compute AB : SQRT(2*AC*AC+2*BD*BD-4*AD*AD)/2
XY_SKEW_FACTOR : TAN(PI/2-ACOS((AC*AC-AB*AB-AD*AD)/(2*AB*AD)))