Balanced Calibration Die
thingiverse
This die is what I use to calibrate my printer and get something useful out of the calibration. The die should be 30mmx30mmx30mm exactly. The material displaced by each sides holes has the same volum, as the total area is the same. Each side has its circle area derived from this function: r = sqrt(Atot/(T*pi)). r = radius, Atot = is total area, T = holes on the side.
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