Quick Calibration Square

** The provided picture shows before and after calibration. It is worth noting you should always start with the mechanics of your printer to ensure everything is square, tightened and lubricated properly. **

This is what I use to calibrate the accuracy of my printers. Its a fairly quick print and should measure 40x40mm at the X and Y axis, and 5mm & 10mm at the different elevations for the Z-Axis. The circle in the middle will let you know if something is skewed (if it prints as an oval). and the axis labeling gives a sense of detail and stringing.

Print - Measure - Adjust - Repeat until you are consistent within 0.02-0.04mm. Here is the process:

1. Print Square and measure/note X, Y and Z dimensions.
2. In terminal (Pronterface, Octoprint, etc.) type M92. This will give you your current steps per mm settings.
3. Take both measurements for each axis and plug them into a steps per mm calculator. (I use this one: https://www.maxzprint.com.au/stepps per-mm-calculator).