Calibration Sphere

thingiverse

We've all printed the XYZ calibration cubes, but they have their limitations. They're great for testing dimensional accuracy, z-wobble, ghosting, and other issues when printed in straight mode. However, some filaments print beautifully on the cube's edges, while problems arise with rounded or curved surfaces. To overcome these challenges, I've designed a high-resolution, 20mm hollow sphere with a flat bottom. Its 0.8mm thick walls are optimized for printing with a 0.4mm nozzle. Printing at 40mm/sec takes about an hour and uses approximately 4g of filament.