MASTER slitter ensures a total control of slitting process. Data concerning slitting of various materials are stored and automatically recalled in case of repeated jobs. The software of the slitter is designed so that it is possible to set easily various tensions on different sections of the slitter. In addition, the system identifies possible problems, advices about methods of solving problems, informs about maintained jobs and stores information concerning job of the slitter. Lower run of material allows placing additional modules such as a laser to cut between unwind and rewind. The customer focused on innovations can optimally use advantages of modular construction.