Check the product of the previous process for wrong cutting.If there is no mistake, the short one should be measured from the bottom to 20±1mm, and the long one should be measured from the bottom to 40±2mm.
Check the product of the last operation again for cutting the wrong foot, if there is nothing wrong, short from the bottom amount to retain 20±1mm, long from the bottom amount to retain 40±2mm.
Check the products of the previous process to see if there is any shearing error. If there is no mistake, the short one should be kept 20 ± 1 mm from the bottom, and the long one should be kept 40 ± 2 mm from the bottom<br>