Controller for cutting sheet material
AssigneeMitsubishi Jukogyo Kabushiki Kaisha
InventorAkihisa Fujita
Life of this patent
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Abstract
A controller for cutting sheet material so that inferior or incomplete sheet material is eliminated is characterized by the provision of means for detecting a length of sheet passing through a rotary cutter which continuously cuts the sheet material, means for calculating a length of sheet moving until the sheet is cut after a shear is started, and means for controlling the start timing of the shear so that a cut portion of sheet cut first by the shear coincides with a cut portion of sheet cut by the rotary cutter.
Claims11
A controller for cutting sheet material so that inferior sheet material is eliminated, comprising means for detecting a length of sheet passing through a rotary cutter, means for detecting a velocity v of the sheet, means for detecting completion of cutting operation of the rotary cutter, means for calculating a length f(v) of the sheet moving until a velocity of a cutting edge of a shear is equal to a velocity of the sheet after the shear has been started on the basis of the velocity of the shear, delay time setting means for calculating a delay time x at the starting of the shear so that a cut portion of sheet first cut by the shear coincides with a cut portion of sheet by the rotary cutter, and timing control means for controlling a start timing of the sheet on the basis of an output of said setting means.
Dependencies are inferred from the claim text.