OK - Bed leveling test

thingiverse

This thing will help you check the leveling of your 3D printer bed. It consists of the word "OK", printed in the four corners and the center of the build plate. The model is 0.2mm high, so printing with 0.2mm layer height will yield a single layer. It is adapted for a 200x200mm build plate but can easily be scaled to fit any (square) build plate. Suggested use: Level the build plate as good as possible using whichever method you prefer. Print the OK test. Inspect the five OKs - if any of the prints comes down squished, lower the build plate in that corner slightly. If there are gaps between the lines, raise the build plate slightly. Print again. If the bed is level, all the OKs should look good. Since many prints only use a smaller area in the center of the build plate, it is often sufficient if only the center OK looks acceptable; but if you're planning on using the entire build plate, make sure all corners look good. Also included is a model containing only a single OK, if you want to place them yourself. I have provided a reference image showing one of the O's printed after and before calibration with this test. This was done on my Wanhao Duplicator i3 v2, in PLA, printed directly on a BuildTak surface. Print Settings Rafts: No Supports: No Resolution: 0.2mm Infill: 100% Notes: Don't use rafts or brims, print as is directly on the build plate.