Calibration Test Strip

Determining the dimensional accuracy / shrinkage ratio of a printer requires a large object that prints fast. Here is a thin 200mm test strip with hexagon ends. This avoids errors that might be introduced by over / under extrusion on a 20mm calibration cube.

I should credit Thomas Sanladerer with the idea. He makes calibration sticks in various sizes, however, he uses round holes, and is somewhat more pessimistic about the accuracy of consumer 3d printers. https://www.youmagine.com/desig