A simple 20mm calibration cube with labelled x, y & z axis. Great for calibrating your steps per mm
This is a simple calibration test cube for your 3...D printer with X, Y & Z written on the axis.
To further calibrate your 3D printer print one out and you can then measure this models dimensions against the expected dimensions.
Once this is done you are able, if your 3D printer allows it, to adjust your Steps per mm in your printers firmware.
if:
e= expected dimension
o = observed dimension
s = current number of steps per mm