Super Calibration Cube

thingiverse

This is an ultra-precise calibration cube, consisting of a stack of four layers with dimensions 10mm x 10mm, 20mm x 20mm, 30mm x 30mm, and 40mm x 40mm. To calibrate your printer, print this cube and then use a caliper to measure the accuracy in the X direction for each layer, resulting in four pairs of numbers: (10, "10 measurement"), (20, "20 measurement"), (30, "30 measurement"), and (40, "40 measurement"). Repeat this process for the Y and Z directions by turning the cube over. Next, plot a line through these points. If your printer is extremely accurate, the resulting line will pass through the origin at a 45-degree angle from 0 to 40. However, if your printer has some inaccuracies, the line may not be perfectly straight or aligned with the origin. To correct for these errors, you can use your slicer software or printer driver to adjust the calibration. This typically involves adding a correction factor to move the line to the origin and adjusting the slope of the line to match 45 degrees. Mathematically, this is equivalent to solving the equation y = P1x + P2 for x and y. If you have advanced slicer software or printer driver capabilities, you can even fit the data to a curve rather than a straight line, which may provide additional accuracy gains for your printer. Note that the labels on the cube are 3mm high letters, which might not print clearly on FDM machines but work well on resin printers like Formlabs.