Abstract
Aiming at the problem of easy tensile deformation of PET film in production process of the energy-saving windows film, the paper presents control requirements of constant tension, constant line speed during the winding and unwinding. Firstly, the article gives a brief analysis of the tension cause and dynamics equation, and then establishes a mathematical model of the process of unwinding. Finally, starting from the model, the paper designed a control scheme to meet the constant tension, constant line speed using PLC and inverter technology. The field operation proves that the control system has achieved the expected effect of the control.Key words: Energy-saving Windows Film;Tension Control;PLC;inverter technology
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