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The CNC bending is effected on the bending machines GASPARINI XP 50/2000 and GASPARINI PBS 105/3000. The move of the main cylinder is electronically synchronized by means of a linear measuring of the CNC control system which guarantees a high accuracy bending. During bending a true geometric strain of a bending beam of a pressing machine is scanned by means of special sensors and according to the actual deviation from the ideal shape a hydraulic cylinder equalizes the lower bending beam in a current bending time. An operator does not need to interfere or adjust the machine. The production rate is very high. The bending machine can bend sheets of the maximum of 3000 mm long with a bending force of 1050 kN.