Hollow 20mm Cube for 3D Printer Calibration

This is a hollow 20mm cube for calibrating your 3D printer! Cubes are popular for calibrating axis linear travel, but this hollow design also allows you to calibrate bridging and extrusion flow, while minimizing the amount of time and filament used for your print. It has 1mm thick walls on all sides, measures exactly 20mm on all outer faces, and has a hollow interior, all without the need for support material.

Instructions:

• Download and print (without support material).
• Measure all sides and adjust stepper motors in your firmware accordingly, by dividing 20mm by your measurement for that axis, then multiplying your stepper's settings by the result.
• Inspect the roof and adjust the bridging speed (e.g., I had to slow mine down to 10 mm/sec to get a flat roof).
• You could also stop a print halfway to measure the cube's wall thickness to fine-tune your extruder steps.
• Repeat these steps until you have a perfect 20mm cube.

Post a picture showing off your cube under the