E3V2 centering (Offset)

This is a simple 210x210x1 mm square that I use to make sure my nozzle is centered on the print bed.

It's simple to use, just center the print in your slicer by entering 0,0,0 in the X,Y,Z move dialog box or simply right click the print and click center

if You don't want to wait for the whole thing to print then you can cancel it after a few layers if you like. then simply use a dial or digital caliper to measure how well centered the square is on you print surface

Keep in mind that your printer needs to be well setup to print this, for example if your bed isn't level you might run into adhesion problems because the lines are only two layers wide

Note: You can probably use the resize feature of your slicer to adjust this to fit any size print surface