Printing Testpart for RepRap Machines

thingiverse

Inspired by Kruth et al.'s (2005) paper, a RepRap benchmark model was designed to test its geometric accuracy. The model features vertical holes for M3, M4, and M8 screws; hexagons suitable for corresponding nuts; horizontal teardrops and hexagons for M3, M4, and M8 nuts; sharp edges with 15, 30, and 45-degree angles; thin walls of varying thickness; sloped walls with various angles for stair-effect testing; round corners with radii ranging from 4mm to 16mm; and gear teeth. The model can also be used to assess perpendicularity and parallelism of printed objects. STL and AoI files are available on SourceForge, and it takes approximately two hours to print. However, the initial model needed adjustments: a complete horizontal hexagon for M8 nuts was removed due to height restrictions, gear teeth were not as expected, 0.5mm thin walls are missing, and 1.5mm walls consist of only two parallel strings with a small gap between them in both directions.