Each NC Slitter becomes automatically set within 30 seconds by a +0.1mm range of error while the slitter knife position is changed constantly and continually. .Adjustment is easy and position change program can be input without stopping JIPIL when the knife should be changed or its life should be extended. Program control centralization enables ease of operation, asa well as continuous precision that decrease the risk of defective goods caused by human error.It is designed and manufactured to control programs quickly and accurately. It complements the existing program, is cost-effective and can easily be attached to existing machines.