Online printed sheet scanning guidance and control technology is a fully automatic detection and control method suitable for high-speed printing that combines printed sheet scanning detection technology and printing quality control technology.
The advantages of this technology are mainly as follows: online detection is fast and accurate, and the repeated process of sheet extraction, measurement and control is replaced by closed-loop measurement and control, which greatly shortens the time for the printed sheet to reach the target density value; the quality evaluation of the online detection system is independent Due to the operator's subjective judgment, the quality control function is implemented more quickly and conveniently during operation. At the same time, when the quality defects of printed sheets are found, the operator can solve them in time on the spot to ensure the stability of the printing quality. The manager can also track the production process according to the test results and improve the management efficiency.
Online printed sheet scanning guidance and control technology uses LED flash illumination and standard RGB polarizing color filters to measure the printing quality control strips on the printed sheet and collect color information of all printing ink areas. The measured color can be up to 7 colors. Then, the information to be inspected collected on the printing production line is transmitted to the system for comparison and analysis with the standard color information preset in the system to check whether the color value of the printed sheet is correct. Finally, the operator or the system automatically adjusts the printing ink supply to achieve online guidance and control of the quality of the printed sheet.
With the development of inspection and guidance technology, printing color and registration have been integrated into a complete online sheet scanning guidance and control system, which can achieve online color measurement, without manual sampling to measure and control the quality of the printed sheet, greatly reducing Color registration and calibration time. At present, the detection time of the printing sheet of 740mm × 1040mm format only needs 3 printing sheets to complete the detection, and the correction of the ink amount in the ink area takes only a few seconds. The automatic online printed sheet scanning guidance and control system can help printing enterprises greatly improve printing efficiency and bring considerable economic benefits.
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