First of all, you should look for the problem of the jumbo roll on the BOPP tape slitting machine. The uneven coating of the jumbo roll will be easy to break. Next, look at the edge of the tape to see if there are any gaps. Check the three aspects. 1. Check if the knife is sharp. 2. When the knife is infeed, whether the knife is shaking (the knife holder is shaking or the holder is shaking) 3. When the spindle rotates, check whether the spindle is beating.