ender3 calibration first layer
thingiverse
Decided to make my own calibration file. This will basically draw a single layer around the perimeter (210mm box), then draw a small square in each corner, than a bigger square in the middle. This will not only show if you have any corner off, but if your bed has any center warp.
Download Model from thingiverse
With this file you will be able to print ender3 calibration first layer 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 ender3 calibration first layer.