The automatic feeder refers to the automatic operation according to the specified requirements and the established procedures. The person only needs to determine the control requirements and procedures, and does not need the direct operation of the feeding mechanism. That is, the mechanism that automatically transfers items from one location to another, during which the process can be automatically and accurately completed without human intervention. Generally, there are a detecting device, a feeding device, and the like. It is mainly used for the transportation of semi-products of various materials and industrial products, and can also be used to automate production in the next process.