Accuracy Block

I am uploading this very simple but very useful object due to repeated requests. This accuracy block is used in conjunction with the calibration pieces found here: http://www.thingiverse.com/thing:1037301.

This block is used to determine the dimensional stability and accuracy of a calibrated filament. After calibrating the filament using the interlocking "C" shapes in the link above you then print this block using the same settings. The dimensions of 0.5" x 1.0" x 2.0" are important. While being dead on is always desirable the real intent is to make sure that dimensional variance in any direction stacks up consistently. For example a variance of .001 in the half inch direction should show up as a .002 in the 1" direction and .004 in the 2" direction. You want these values to be proportional for a good filament. If they are within .0005" for me then I consider it good. See the pictures.

The STL file is Cura scaled and oriented for printing.

I have been able to use this