Understanding the Thirty Factors that Cause Plate-making Equipment Failures

The pre-printing plate equipment has a high proportion of faults due to external factors. The reasons for this are various, and the solution must be determined according to the actual situation. In the course of maintenance, the author summarizes the 30 factors that are likely to cause the failure of plate-making equipment. These factors are inextricably linked with equipment failures. Of course, there may be some other important factors that may not be included. However, careful analysis of these factors can ensure that The normal operation of equipment and the rapid release of faults are briefly described below:

1. Dust: The plate making equipment, especially the late electricity and photocopying equipment, is a precision equipment. Dust is the biggest natural enemies to such machines. Dust can cause great harm to the equipment. Therefore, in daily maintenance, clean. Most important.

2. Oil pollution: Due to the influence of precision mechanical friction, almost all equipment uses different types of lubricants. In the long-term lubrication process, affected by temperature, dust, and the powder generated during friction, the oil is extremely likely to form oil and directly cause mechanical obstruction and local temperature increase, which is also an important factor causing mechanical failure of the device.

3. Contamination: Contaminated items include two aspects, one is oil contamination, and the other is contamination caused by the combination of debris or accumulated debris and moisture in the air during equipment operation. Initial contamination does not generally have a major impact on the equipment, but long-term accumulation can easily cause damage to the equipment locally, such as dirty spots on the monitor.

4. Raw material adhesion: The raw material adhesion performance is more serious in the development machine and the proofing machine. It is the development process of the developing machine. After the chemical reaction between the film surface material and the developing solution, it is easy to adhere to each roller. If the proofing ink is improperly cleaned, it can easily adhere to the ink roller and the rubber roller. Therefore, maintaining regular cleaning is a good way to solve the problem of raw material adhesion.

5. Wear: Most of the wear occurs in the parts where machinery is often active, such as various plate-making equipment bearings and active screw clamps, etc. The most effective way to reduce wear is to add more oil.

6. Vibration: Vibration will not only cause the equipment itself to malfunction, but also may cause problems with the quality of the product. After effectively ensuring the correct installation of the equipment, it is also necessary to constantly check its stability and level.

7. Loosening: Most of the loosening causes are caused by external factors, such as the vibration of the equipment. During daily maintenance, it is necessary to check the tightness and fixation of each screw.

8. Leakage: refers to the leakage of the protective liquid after the aging of the components of the prepress equipment or the impact caused by the impact, so that the temperature of components rises and burns, such as the circulating cooling water in the SCREEN P-641-FW duplicator lamp.

9. Corrosion: Most non-metal devices with volatile liquids have varying degrees of damage. Substances that are attached to the surface of the device and are not removed in time are the main cause of corrosion.

10. Creep: The process of creep is generally not easy to express because creep can be expressed both mechanically and electronically. Therefore, minor changes in equipment parameters should be taken into account when testing equipment.

11. Stress deformation: Stress deformation is a physical phenomenon that occurs more often at work in equipment. After the work is completed, the lack of timely adjustment of the equipment is an important factor affecting the deformation of the mechanical and circuit board slots of the equipment.

12. Scratches: The equipment in operation is scratched by the collision of external objects. Scratches can directly cause major equipment failures and may also affect product quality, such as roller scratches on electrical extensions.

13. Cracks: The main cause of cracks is the long-term stress or gravity of the equipment. In the event of a crack, under normal circumstances, do not repair, in order to prevent secondary cracking equipment damage.

14. Fever: After the electronic equipment is powered on, there is generally a phenomenon of heat generation, and there is also a phenomenon of heat generation after metal mechanical friction. Electronic heating requires an auxiliary heat sink, while metal machinery relies on its own thermal conduction to reduce heat dissipation. Daily equipment testing needs to pay attention to the degree of heating of the equipment.

15. Abnormal sound: In the course of operation of the machinery and equipment, the sound of a regular sound emitted by the influence of many factors such as heat wear, etc., needs to be shut down for maintenance in time, otherwise it is easy to make the fault widen.

16. Short circuit: Short circuit is often accompanied by damage of other components. The short circuit itself is caused by component aging, human error, etc. After a short circuit occurs, do not power on immediately. Check the cause of the fault and then conduct power test. .

17. Poor insulation: The aging of the equipment and the heat generated during operation can cause the insulating performance of the insulation to decrease. Poor insulation can short-circuit the device. Be as generous as possible when controlling and replacing components or circuits.

18. Continuity obstruction: It is the phenomenon that no current passes through the movable element after the guide body or the electronic switch, relay and other components are affected by voltage, current, and contact resistance during operation. Continuity barriers can generally be tested by turning on the power.

19. Resistance change: The resistance of a conductor changes with temperature, but it cannot change back to the resistance at room temperature after a change. We call this resistance change. In addition to the influence of the material itself, the resistance change also has a greater relationship with the passing current. During the repair process, pay attention to replace the same element or conductor with the original resistance.

20. Capacitance change: The change of capacitance has a greater relationship with the manufacturing process. Pay attention to the operating voltage of the capacitor. Long-term overvoltage operation can easily change the value of the capacitor.

21. Fatigue: The work of the equipment should have a certain amount of rest time. For long-term uninterrupted work, fatigue occurs in every aspect of the equipment, and many failures are directly related to fatigue. Although many devices are marked with long-term work, if they can take a rest for l-2h every day, the operation will be more stable.

22. Corrosion: Corrosion is the same as corrosion, except that the target is different. Corrosion and metal objects have a greater relationship. The obvious feature of corrosion is the production of rust alone on the surface of the metal field that affects the work of the equipment. There are also many equipment rusted in the active areas due to the lack of necessary oil protection.

23. Loss: The process of losing equipment performance and parameters during work is called draining. The loss was caused by the overloaded operation of the equipment. The loss problem was also related to the design of the electrical performance of the equipment.

24. Poor lubrication: The lack of oil or high local oil temperature is a feature of poor lubrication. Poor lubrication causes direct mechanical friction between the mechanical metals and causes mechanical failure of the equipment. The result will be wear.

25. Improper cooling: The heat dissipation of an electronic device requires its heat sink to be determined based on the degree of heat generation. When the electronic equipment needs to be partially cooled and the outside temperature is high, it is extremely easy to cause improper cooling.

26. Hardening: Hardening is the chemical reaction of a non-metallic substance after it has been exposed to high temperatures. There is also oil and dust gathered into a hardened substance.

27. Softening: In contrast to hardening, softening is a phenomenon in which the strength of a component or device is weaker than normal when the device is subjected to vibration or high temperatures.

28. Scorch: It is a fault phenomenon that can easily occur when a component is short-circuited or partially overheated. For example, the temperature of the electric extension is too high and the optical fiber around the scorch is too high.

29. Electrical parameter drift: When the external voltage is bake to the main board, there is a great fluctuation, so that the parameters of the components in the work with the large fluctuations in voltage and long-term occurrence of this phenomenon will make the fixed working point of the component drift The formation of electrical parameter drift phenomenon.

30. deterioration: due to its own quality problems or the impact of current and other phenomena, so that the performance of the component changes greatly and can not work, called deterioration. We must accurately measure the replacement of components during maintenance to prevent secondary deterioration of the circuit due to deteriorated components.

The above description of the 30 factors of the plate-making equipment failure is briefly described. In most of these factors, the device exhibits pre-symptoms and can be detected in a timely manner. In actual production, as long as full participation is possible, many failures can be prevented and eliminated in a timely manner.