Yet Another Calibration Cube

thingiverse

I think it's a rite of passage to design your own calibration object; this one is mine. It is small, measuring 25mm on each side, and primarily designed to test dimensional calibration, but also allows you to evaluate overhangs and bridging to a limited extent. It's not as quick to print as a featureless 20mm cube, but it's got more going on. Print Settings Printer: MP Select Mini Rafts: No Supports: No Resolution: .2 Infill: 15% Notes: There are integral "supports", so you don't need your slicer to add them. I believe it's preferable to print with a skirt rather than brim if you want to measure elephant foot. That said, you may find that a brim is necessary for the support cylinders to stand. The print shown above was done with a small negative "horizontal expansion" in Cura, which was enough to cause the center hole and edge cutouts to intersect. Post-Printing Measurements you can verify with a set of calipers: Overall LxWxH = 25mm Diameter of all holes = 15mm Distance from edge of hole to face = 5mm Cut corners = 5mm or 10mm, making remaining distance 20 or 15mm Diameter of integral support cylinders = 2.7mm Height of support cylinders = 4.95mm and 9.95mm By taking the 15, 20, and 25mm measurements on any axis, you can find out whether your size error is constant-value (more likely to be corrected by adjusting flow or "horizontal expansion"; or bed leveling/Z0 in the case of height) or constant-factor (more likely to be corrected by adjusting axis scale).