Printer Calibration Cubes Free 3D print model

cgtrader

After several failed attempts to print parts that are supposed to be mated together, they didn't fit, so I figured out that I don't fully understand my printer's error rate in each axis yet. So I designed these cubes which can be used to create an error profile for your printer. For every print setting you want to test (speed, number of shells, layer height, etc), print this out, and use a caliper to take 5 measurements on each of the 3 pieces and compare to the expected sizes. Measure: X-inner (hole) width, X-outer (peg) width, Y-inner (hole) width, Y-outer (peg) width, Z height. I expect that if you tell your printer to print a cube with X-axis size S, the actual printed size, T, will have both constant error, c (like 0.28 mm), and multiplicative error, m (like 4.6%). Therefore, you technically only need two pieces to get two (S,T) pairs that can be plugged in and solved for m and c. I print three because I want to do the calculation between each pair and confirm the answers match approximately. Notes: The X and Y dimensions of the cube are the same size, but only X is marked in the diagrams. My printer does have different errors in X and Y, so be sure to measure and compute them separately. The notches in the upper-right corner are simply to maintain XY-orientation after you've removed them from the build platform. Without it, you may not remember which direction was X and which was Y. You could probably figure out inner sizes just from the outer sizes technically, but I wanted more-direct measurements, since part of the reason I'm doing this is so I can make pegs and slots that fit on the first try.