Z axis calibration and verification using 0.100" (2.54mm) pitch headers

thingiverse

This calibration object helps with printing header probes that require precise accuracy in the z-axis. Created to calibrate a 3D printer for printing a specific probe, this object ensures the header probes are spaced correctly by requiring accurate z-height axis. To calibrate, print this object and measure the 40mm and 20mm walls to ensure they are sized correctly. If printed properly, you can fit standard 0.100" (2.54mm) pin headers into the holes. If not, measure the longest length. The maximum height is 40mm, so if your printer calibrates via a 20x20x20mm cube, halve the 40mm to get the z-height calibration result. The 40mm size was chosen to make the 20mm cube data entry more accurate after division by two. For sanity checking, there is also a 20mm z-test on this object. This object was printed with an 0.8mm nozzle diameter and a 0.2mm layer height.