This is a adhesion / warp test (stress & calibration) thing, which is quick to print.
Every part of the thing is designed to warp in different ways, testing your printer and setting to the max.
#The model will very likely fail but you can learn from each failure.
To make it even more difficult print it in the corners of the heated bed.
I will happily try to help with any calibration questions; please include the following info when asking for advice; -Material (FYI i only use PETG) -Recommended manufacturers extruder temp -Recommended manufacturers bed temp -Any bed cleaning method / glue / tape. (i use only a clean bed) Please be careful as PETG can stick too well and damage the bed! -First layer extruder temp -Other layer extruder temp -First layer bed temp -Other layer bed temp -First layer height -Layer height -First layer width -Default layer width
Note before trying this test, -Make sure your bed is a flat as possible <.2mm variance. -That your z height is optimal. -Extrusion multiplier is the correct value.
Some helpful things; https://www.thingiverse.com/thing:1622868 https://www.thingiverse.com/thing:2753088