Inovance Film Blowing Machine Friction Winding System Control Solution - Inovance Blown Film Blowing Machine Special Inverter
Abstract: When tension is generated by speed difference, the inverter works in the open-loop vector control speed mode, and the dynamic response is fast. It overcomes the situation that the torque of the torque motor is too small and the deceleration tension is too large. In the speed control, the motor has a constant torque output. When the linear speed and the tension are constant, the speed of the winding roller is kept constant, and it will not change due to changes in the material diameter, load, and the like.
Process requirements:
â– The thickness of the extruded film is achieved by changing the ratio of the speed of the main motor to the draw motor. Therefore, the steady-state speed accuracy of the inverter is required to be high, and the fluctuation of the speed will cause uneven film thickness.
â– Tension and two nip rollers are required. Tension control is required between the two nip rollers and the left and right winding. Different materials have different tension requirements, and the tension must be able to adjust independently;
â– The material receiving shaft leans against the rewinding roller and relies on the friction between the rewinding roller and the receiving shaft to drive the receiving shaft to rotate, so that the material is received on the material shaft. The material tension is independent of the reel diameter.
plan description:
â– Tension control using speed difference method;
â– Use the high-speed pulse port to ensure the basic synchronous ratio between the draw, the two nip rollers and the take-up roller, and then use the tension potentiometer to give a stacking speed to make the speed difference with the system speed to form a tension;
Program advantages:
â– The tension is generated by the speed difference, and the inverter works in the open-loop vector control speed mode, and the dynamic response is fast, which overcomes the situation that the torque of the torque motor is too small and the deceleration tension is too large;
â– Motor constant torque output during speed control. When the linear speed and tension are constant, the speed of the winding roller is kept constant and will not change due to changes in the material diameter, load, etc., thus overcoming the torque motor's constant adjustment of the output torque in order to maintain a constant tension during the torque motor from empty to full winding. Shortcomings. System operation is simple.
Transmission schematic
Control schematic
Wanwei Industrial Control provides blown film machine friction control system control program - Huichuan blown film machine special inverter for winding
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