Ceramic Universal Printer Accuracy Test

Within the maximum printable format of the printer, print a rectangular frame. After printing, use a ruler to measure whether the lengths of the diagonals are the same. According to the rule of quadrilateral diagonals, if the diagonals are the same length, this is a standard rectangle. , if the lengths are not equal, it means that it is no longer a rectangle, but a rhombus or a trapezoid. If the printed lengths are not equal, it means that the printed rectangle has been seriously moved, and the printing accuracy does not meet the qualified requirements.