The software files can be read automatically after figure to fold the corner, tell the user adjacent corner distance, Angle. The user can from multifarious error-prone manual calculation of the length on out. Besides its biggest advantage is built-in length compensation function, can according to machining tool radius and the bottom of the thickness of the material on the length of the intelligent compensation, to avoid the direct users according to the length of the file glyph calculated words and floor matching the poor.