Large calibration star

Unless you've modified your printer's drive-train, this print should simply confirm correct calibration. Any 'errors' here are most likely due to damage to the toothed-belt, different drive wheels or different steppers. It's also possible that your steppers are skipping, or the belys are jumping.

To check calibration of X and Y, this is as large as can be comfortably measured with a 6" vernier. X and Y at 140mm, with diagonals as well. Any error in X and Y ought to contribute 0.707 to the error in the diagonals (which ought to be equal for any cartesian print)

Ends are undercut to avoid problems with the first layer. This means that you ought to run to layer 6 or 8 even for a 'quick' test using this part (which is where the individual X and Y may come in handy for a post-adjustment test. The two are of course the same (except for the rather fine labeling)

Takes about 1:30 to print at 0.2 mm, depending on layer and wall settings.

Be sure to let it cool before removing for be