Cutting apparatus for sheet-like materials

A cutting apparatus for sheet-like materials comprising:

• traveling means having a traveling support member movable above a sheet-like material, cutting means hanging from said traveling support member of the traveling means and movable in directions perpendicular to traveling directions of the traveling support member, first detecting means for detecting positions of said cutting means in the traveling directions of the traveling support member, second detecting means for detecting positions of said cutting means in directions perpendicular to said traveling directions of the traveling support member, and arithmetic means including a signal converter and a digital arithmetic unit for obtaining a cut line of said sheetlike material obtained from the positions of said cutting means on co-ordinates with the aid of signals detected by said first and second detecting means, and further obtaining an approximate straight line of said cut line and an angle of the straight line deviating from a predetermined line along which said cutting means is to be moved.