With the increase in printing speed, the detection system has been rapidly developed in the processing industry. Today, 100% fully automatic fault detection technology has been realized. Today, you can hear the word "fault detection" in almost all industries. Used in the printing and packaging industry, it can help us find all defects on printed products, and can be applied to different printing methods.
In terms of printing quality inspection, countries such as Europe, America and Japan have made great progress. As early as the 1970s, there were already manufacturers actively working on the use of image processing systems to digitize visual information, to realize "seeing" and "cognition" of print quality through computers, and to perform high-speed, high-precision 100% real-time detection completely eliminates human errors and establishes a unified and quantifiable detection standard. At present, BOBST in Switzerland, PROIMAGE in the United States, DAC and TOKIMEC in Japan can provide automatic printing quality inspection equipment.
At present, there are two basic types of detection systems for fully automatic printing fault detection technology, namely 100% sampling type and 100% comprehensive type.
The 100% sampling system refers to repeatedly selecting a printed part within a period of time and performing 100% monitoring on the part. The repetition time can vary from a few seconds to a few minutes. The 100% comprehensive system monitors each part of the product processed on the printing press 100%. These two systems use diametrically opposed camera technologies: progressive scanning (using a linear array CCD camera) and block-by-block scanning (using a general CCD camera). The 100% comprehensive inspection system based on block-by-block scanning is relatively new in technical content, and its application in some packaging is better than the line-by-line scanning technology.
The 100% sampling system will only detect the faults that the camera sees on a specific printed part at a specific moment. To be precise, the 100% sampling type detection system does not have the function of finding faults on the entire printed product. Their advantage lies in their ability to accurately monitor certain specific characteristics of processing quality, such as color, overprint, streaks, and repetitive failures. The 100% comprehensive detection technology can help you find the lack of the entire printed product, but the investment of this system is more than 3 times that of the usual type. The customer must prove that there is a real need before the investment can have a tangible return. Printing manufacturers must do some investigation before actually purchasing the inspection system. They must investigate the types and causes of the printing waste they are currently facing, and choose the appropriate inspection system according to different reasons.
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