Offset Typical Troubleshooting

The so-called offset fault refers to an abnormal phenomenon in the production or operation of the machine. As offset press operators and managers must master the law of the occurrence of offset printing faults and troubleshooting methods, so that production can proceed smoothly.

The biggest features of offset printing are:

1. Comprehensiveness and complexity

Offset press is a complex machine. Its power system is composed of motor and air pump. Its movement is composed of paper feeding, positioning, ink delivery, water delivery, embossing, and paper collection. During this period, there are numerous cooperations. With the transfer, in addition to the use of printed materials, the final image is printed on the surface of the substrate. In this process, the fault can be generated at any time in any component and any process, or between its associated relationships, which determines the comprehensiveness and complexity of the offset fault.

Its comprehensiveness and complexity are also reflected in the fact that the same failure can be caused by different reasons. For example, misprinting may be caused by misalignment by the positioning mechanism, or it may be caused by unreasonable lining or improper use of the wetting fluid. Conversely, the same cause may also cause different failures. For example, excessive use of wetting fluid can cause overprinting, back sticking, and poor drying. Due to the comprehensiveness and complexity of the printing failure, it was decided that the offset printing operator should develop from one-way thinking to multi-directional thinking.

2. The practicality of offset printing faults

Offset faults are manifested in the printing production process. With understanding of offset faults, based on theoretical understanding, it is impossible to obtain deep understanding and intuitive judgment on offset printing faults, and it is impossible to obtain the ability to eliminate faults. Must be familiar with the actual performance of various faults in practice, and then analyze the reasons on the basis of the accumulation of the ability to eliminate the fault, troubleshooting, offset printing or printing materials need to make some adjustments. This adjustment relies on theoretical guidance and practical experience, but the adjustment process is the performance of operating skills, whether the adjustment is reasonable, whether it is in place, it must be a specific breakdown of the specific analysis. The failure of the same substrate in different models is not the same. Therefore, the analysis of printing failure is not only a technical theory, but also a practical skill.

3. Regularity of offset printing failure

Offset printing faults have both comprehensiveness and complexity, but they also have their regularity. As long as you master the rules of failure and clarify your thinking, then complex faults can be eliminated in time. The law followed by the offset printing fault is essentially the principle of offset printing process and the law of operation control technology. Any printing that conforms to this rule will normally proceed. If not, a variety of failures will occur. Regularity. Generally speaking, a failure occurs. The first classification is device fault or process fault. If it belongs to a mechanical fault, it must be followed by mechanical fault analysis and exclusion. Otherwise, it is analyzed and eliminated according to the law of process faults. Types also have different laws. For example, the fault laws produced by sheetfed and web offset presses are different. Similarly, the faults produced by single-color offset presses and multi-color offset presses are not the same. Offsets produced by offset presses and semi-satellite drum offset presses are not the same. Therefore, to master the commonness of printing faults, it is important to understand their personalities so that they can be targeted.