Under the condition of large elastic-plstic bending, no mater how different the original bending degree, the CNC precision leveling machine uses the "Bauschinger effect" of the material to bend the plate repeatedly, gradually reduce the bending deflection, and gradually change the origina curvature into a single curvature, and finally level it to achieve the leveling accuracy required by the process. After a series of alternating bending, the sheet metal is controlled by the motor and the PLC to accurately control the lower pressure of each leveling drum,elminating the internal stress, and fundamentally solving the unsatisfactory leveling effect caused by the different stress in each part of the sheet metal, thus achieving high precision leveling. MHT20 Series sheet metal CNC precision leveler parameter table Machine Model MHT20-400-19 MHT20-600-19 MHT20-800-19 Roller Diameter 20mm 20mm 20mm Roller Number 21/23 21/23 21/23  Nominal Leveled Width 0-400mm 600mm 1000mm Rated Plate Thickness 0.3~1.2mm 0.3~1.2mm 0.3~1.2mm Max, Plate Thickness 2.0mm 2.0mm 2.0mm Shortest Workpiece 40mm 40mm 40mm Applicable Object Tape Coiling. Strip Steel, Sheet Metals,etc.