--Created this to check bed calibration. --Model walls are 1 mm wide. --Model is 1 mm tall. --280 mm dia. outside (white line on Onyx bed). --Small arrow in center points to front of machine. --Drawn in Fusion 360.

--Print 1st layer .4, rest at .2. -- Print... -- Let bed cool... -- Carefully remove... -- Measure thickness at different points to see how flat your machine is printing.

Attribution - Creative Commons

Calibration, RostockMAX, TrickLaser, HE280, Brian, TestPrint, Fusion360