What is the principle of the automatic rectifying device of the compound machine? What sensors are commonly used (ultrasonic, photoelectric, pneumatic, etc.)? What is the difference in the range of use of these sensors?
The automatic deviation correction device is a system which can automatically detect and control the transverse position of the belt. It detects the edge or edge line of material belt (base material) by sensor, calculates and analyzes the fluctuation or error of its transverse position by control system, and sends out error correction instruction, and corrects the transverse position of strip by the actuator.
The commonly used sensors are ultrasonic sensor, photoelectric sensor and pneumatic sensor. Ultrasonic sensors are suitable for all materials and are generally used for heel. Photoelectric sensor is mainly used for tracking line, but it can not be used for the heel edge of transparent substrate. The pneumatic sensor is suitable for all kinds of materials, but its accuracy is low.

	ultrasonic sensor	Photoelectric sensor	Pneumatic sensor
Scope of applicable materials	Various materials	All kinds of material follow line, non transparent material heel edge	Various materials
accuracy	higher	higher	Lower
Heel line	Heel side	A heel or line	Heel side

Dongguan Beite packaging materials Co., Ltd. - located in Dongguan City, the world's manufacturing city, is a subsidiary of Beite packaging (China) Co., Ltd., with a plant area of 6000 square meters. It is a flexible packaging enterprise integrating R & D, production and sales. It has a complete set of domestic advanced production equipment, a scientific and humanized management system and a group of experienced technical personnel For backing, to provide customers with quality products and first-class service.
The company produces composite bags, roll film, fruit bags, aluminum foil bags, suction mouth bags, self-supporting bags, zipper bags, anti-static bags, special-shaped bags, etc., which are suitable for the internal and external packaging of food, daily chemicals, electronics, toys, medicine, cosmetics, industrial products and other industries.
We uphold the integrity of cooperation, good quality, good service business philosophy, won the industry's approval, products sold to all over the world; welcome friends from all walks of life to inquire, visit our factory to investigate guidance and business negotiations.