Cut first 20CM from the roll. After that, cut 2 pcs to measure length, make sure length and hole positon is within spec and check first article. If qualified can lot cut. Half roll of backsheet check 1 piecs, making sure no bur, no dirt and length is correct. Check the last 2 piecs of backsheet in this way. Any piece out of spec is not allowed to be used. Stop machine and inform equipment. When dimensioning, place backsheet on table, alignment “0”.