25mm penny & arch calibration cube

thingiverse

To practice SCAD coding and evaluate my 3D printer settings, I designed a test object in the form of a cube. The cube measures 25mm on each side and features two circular indentations that perfectly accommodate both US and Canadian pennies (due to their identical diameters). One indentation is at the top, labeled "T," while the other is on the side and has an inset cone. By inserting a penny into both indentations, you can quickly determine if any of your printer's axes require adjustment; if there's more than 0.5mm clearance in any direction, that axis needs calibration. Additionally, the inset cone tests filament handling and reduces print time by creating an empty cube space.