In the automatic packaging process of composite film coils, it is often necessary to perform positioning heat sealing and positioning cutting, and an electric eye cursor is required for positioning. There are certain differences in the size of the cursor and the different screw packaging opportunities. Generally, the width of the cursor is greater than 2 mm and the length is greater than 5 mm. The cursor generally uses a dark color that has a large contrast with the background color. Zui is easy to use black. Generally, you cannot use red and yellow as the cursor. You can't use the color code of the same color as the photoelectric eye as the cursor color. For example, the light of the photoelectric eye is green. Light, you can not use the light green color as the color of the electric eye cursor, because the green photoelectric eye can not recognize the green color. If the background color is a darker color (such as black, dark blue, deep purple, etc.), then the cursor should be designed to hollow out the light white cursor.
The electric eye system of the general automatic screw packing machine is a simple identification system, and cannot have the function of intelligent fixed length like the bag making machine. Therefore, in the longitudinal range of the electric eye cursor, the film film is not allowed to have any disturbing characters and patterns, otherwise it will Caused an identification error. Of course, some of the more sensitive electric eyes, the black and white balance can be finely adjusted, for some light color interference signals can be removed by adjustment, but the color is similar to the cursor or the darker pattern interference signal can not be removed.
The spacing between the cursors is used to lengthen, so the error between the actual spacing and the design value should not be too large, and generally only 0.5 mm error is allowed. For many automatic packaging equipment, the negative deviation is better than the positive deviation tracking, so it is recommended to design a negative deviation.
Aluminized or pure aluminum has strong specular reflection, which will affect the recognition of the electric eye. It is recommended that the composite film cursor be printed on a white background. For transparent composite films, it is also recommended that the cursor be printed with a white background due to the color of the item in contact with it, thereby reducing interference.