Concentric Ring Fit Test

This is a very tight tolerance concentric ring fit and calibration test. It was designed around PLA but should be applicable to any material. It is assumed that the printer on which the test is run can hold a tolerance of 0.1 mm. It is highly recommended that the basic filament calibration test found here http://www.thingiverse.com/thing:1037301 be run before you try this one.

This calibration and fit test consists of three rings that match up and fit inside each other to test different parameters. This will test the fit between two walls, the fit inside a single wall, and flushness on the inner walls from one part to the next. If your X or Y axis are not calibrated properly you will print an oval which will not allow the parts to fit properly. This will also test short span 4 mm radial bridges. If you are getting any sag in any direction the middle ring will not fit flush.

Once printed the only post processing that might need to be done is first removing the lip sometimes