1: The optical recognition system is a fixed optical camera system. During the rotation process of the installation head, the contour of the components is recognized by the camera for optical imaging. At the same time, measure and record the center position and rotation angle of the components relative to the camera, and transmit them to the transmission control system to compare the XY coordinate position deviation and θ， Angle deviation compensation has the advantages of accuracy and flexibility, and is suitable for various specifications and shapes of components. It has a reflection recognition mode based on device electrodes, and the recognition accuracy is not affected by the size of the nozzle. Components such as SOP, QFP, BGA, PLCC generally use reflection recognition mode. The transmission recognition method is based on the shape of the component, and the recognition accuracy is affected by the size of the suction nozzle. When the shape of the suction nozzle is larger than the contour of the device, the contour of the suction nozzle will be recognized in the image.

　　Due to the use of the light source in the optical camera system for a period of time, the lighting intensity will gradually decrease. Due to the fact that the lighting intensity is directly proportional to the grayscale value converted by the solid-state camera, the larger the grayscale value, the clearer the digital image. Therefore, as the intensity of the light source decreases, the grayscale value will also decrease, but the grayscale value stored in the machine will not automatically decrease as the intensity of the light source decreases. When the grayscale value is lower than a certain value, the image cannot be recognized. Therefore, regular correction and testing must be carried out ①

　　Recalibration ②

　　Adjust the aperture focal length. The grayscale value is proportional to the light intensity of the light source. When the intensity of the light source is too weak to recognize the device, the light source must be replaced. At the same time, dust and devices on lenses, glass sheets, and reflectors should be regularly cleaned to prevent dust or devices from affecting the light intensity of the light source and causing poor recognition; On the other hand, it is necessary to set the relevant initial data of the camera correctly.

　　2: The whole piece attitude detection is achieved through a linear sensor installed on the rack, which performs high-speed scanning from the lateral side of the device to detect the suction state of the device and accurately detect the thickness of the device. When the thickness value set in the component library exceeds the allowable error range from the measured value, poor thickness detection will occur, leading to component loss. Therefore, it is crucial to correctly set the data of components in the component library and the benchmark data for thickness detection and control, and it is necessary to frequently retest the thickness of the components. At the same time, the linear sensor should be regularly cleaned to prevent the detection of the thickness and suction status of dust, debris, oil stains, and other devices adhering to it.