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5mm Calibration Steps
This is a simple calibration object designed to test accuracy of your x, y and z axis linear travel, angular alignment and slicing settings, with some small bridges thrown in.
Original by MCroucher at http://www.thingiverse.com/thing:24238
Duplicated to Youmagine by tjb1 at https://youmagine.com/designs/5mm-calibration-steps