XY calibration cross

A simple model for accurate measurement of printed X and Y axes. Designed to eliminate possible printing errors such as elephant foot, protruding corners and other defects that could affect the accuracy of the measurement. In the same way, the cross is based on a 100 mm circle so that the measurement is accurate even in the case of a wrongly placed gauge. I recommend using a digital slider with which it will be possible to measure the part accurately to a few hundredths. Place the seams of the individual layers outside the tops of the cross.