X,Y calibration
thingiverse
Simple X,Y calibration test part with notches for calipers, can scale to fit your print bed.
Download Model from thingiverse
With this file you will be able to print X,Y calibration with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on X,Y calibration.