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Tension Control Tension control is the control of the strip can be sustained on the device when the tension transmission capacity. Any such control the speed of the machine must remain valid including the machine's acceleration deceleration and constant speed. Even in the case of an emergency stop it also has the ability to ensure the strip does not produce the slightest damage. Gravure printing machine tension control are basically manual tension control open loop-style semi-automatic fully automatic tension control and closed loop tension control three categories. Tension control is a manual winding or unwinding in the process when the roll diameter changes to a stage by the operator to manually adjust the power supply unit thereby to control the tension of purpose. But modern gravure printing machine manual tension control system has basically been eliminated but merely as a closed loop automatic tension control system in one mode of operation exists. Open-loop tension control also known as semi-automatic roll diameter detection style tension control which is installed in the scroll at the proximity switch to detect the scroll speed scroll through the set initial value of the diameter and material thickness cumulative demand have to charge the current volume or put the diameter of rolls roll diameter changes in the corresponding output control signals to control the winding or unwinding torque braking torque thereby adjusting the tension of the strip. Because the roll each turn the volume will occur 2 times the diameter of the strip thickness. Without external stimulation such tension control the impact of stable tension control can be implemented. However due to changes in the torque transmission device linear and mechanical wear and tear and other factors that the absolute accuracy of tension control is poor.
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