Printing Testpart for RepRap Machines

I published this on the RepRap buliders blob http://builders.reprap.org/ some days before and was asked to publish it here also.. so here is my post from the Builders blog...

nspired by a paper from Kruth et al. (2005, Benchmarking of different SLS/SLM processes as rapid manufacturing techniques) I also designed a benchmark model for the RepRap. It looks quite random but by printing it you can check whether your RepRap prints geometrically correct. I included the following features:

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