Our company has been used for many years to detect the pneumatic sensor of the cling film rewinding machine, but the sensing and control elements in this system are the gas and oil way, so the reaction speed is slow.In addition, the accuracy of rectifying control of gas-liquid servo - oriented system is low.With the development of printing materials and the improvement of printing speed and precision, in the 1980s, the electronic guidance system was developed rapidly and developed greatly.

1. In the electronic guidance system of  cling film rewinding machine, the error detection is usually carried out by photodiode or ultrasonic sensor;Amplification link adopts IC amplifier;The execution link adopts the dc motor with controllable silicon rectifier.The electronic guidance system photoelectric sensor can be used for the edge orientation of opaque materials.For transparent materials, the photoelectric sensor can detect the printed datum line, control the color interlock and guide it in the rewinding or parting.Neither visible light nor infrared photodiodes can be used for edge detection of transparent materials.The ultrasonic sensor can be used in order to meet the requirement of uncoil orientation detection.Working principle of ultrasonic sensors and pneumatic, photoelectric sensor is similar, but the test medium is adopted by the ultrasound, so whatever transparency on membrane materials, can be tested.

2. Basic composition of the electronic guidance system of the cling film rewinding machine.The error signal detected by the sensor is amplified by the amplifier and then entered into the controller.The controller can amplify the power and output the control signal, and the strength of the control signal is proportional to the error size.The translation drive mechanism consists of dc motor and transmission system.The intensity of the control signal determines the rotational speed of the dc motor, and the rectifying adjustment of the corresponding error value can be obtained.

In the actual application of the cling wrap machine, the electronic guidance system also includes some auxiliary functions, such as the translation drive mechanism to return automatically from the end of the trip;Zero display;And the speed feedback system used to control the speed of rectifying speed and the running speed of the bearing material.Equipped with the corresponding actuator, the electronic guidance system can be used to uncoil, center, rewinding, etc.