Calibration Coin
thingiverse
I made this to test my Ender 3 firmware tweaks. Its quick and only takes a couple minutes to print. the single coin file prints one coin width of 1cm and the other will print a coin with the dimensions of a quarter. (24.26mm wide and 1.75mm high)
Download Model from thingiverse
With this file you will be able to print Calibration Coin 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 Calibration Coin.