When our program-controlled paper cutting machine has good working performance, if its cutting surface is curved, it may be due to the improper angle of its cutting edge. In the actual operation process, if the ordinary offset paper should be cut for coated paper, but the cutter is not replaced, the blade angle will be inappropriate, so the size of the cut paper will not be the same. Suitable. But when we replaced its cutter, the paper it cut out was normal again. At the same time, after measurement, we found that the blade angle of these two types of cutters is only 2 degrees, but the difference in the size of the cut paper is more obvious, which also shows that in the program-controlled cutter, There is a close relationship between the choice of mouth angle and the quality of the product cut out.