CTP Platesetter Common Failure Analysis and Troubleshooting

Compared with traditional plate making technology, CTP plate making machine has the advantages of reducing process links, saving materials, space and labor, shortening the production cycle, etc. Moreover, due to the reduction of human factors, the quality of CTP plate making machine can be controlled, especially for newspapers, the publication time is extremely important. The introduction of CTP plate making technology also delays the submission of manuscripts, improves the quality of graphic reproduction, because in graphic reproduction, a process is less and the distortion is less than one layer), and shortens the plate making time and printing start-up time.

AGFALP82ULTRA is a complete CTP plate handling system that includes developing, cleaning, fixing, drying and several enhancements. It is an essential part of the CTP process. Because of the high imaging and developing speed of the Violet Laser CTP plate, a matching plate maker is required. After the plate is exposed by the plate maker, it needs to go through developing, washing, fixing and drying. Summarize some of the faults of LP82 and treatment methods, and peer exchanges.

1, the development temperature is too high (too low)

When dealing with PL82, sometimes the liquid temperature in the developing tank is too high (generally 21 degrees). By checking the machine's parameter settings, found that the development temperature is higher than the default temperature. The temperature in the developing tank is usually sufficient about 15 minutes after startup. The liquid reaches the desired temperature through the circulation pump and the heating or cooling system reaches the desired temperature. If “DEVTEMPHIGH(LOW)” is displayed on the operation panel during use, it means that the temperature of the liquid in the developing tank is too high (too low). It is mainly caused by poor circulating performance of circulating pump and insufficient liquid flow. The reason is that in the usual machine maintenance, the residual liquid in the pipeline is not thoroughly cleaned up. Need to use warm or hot water for several cycles of cleaning, and then rinse with a high-pressure water gun, the cleaning effect is more obvious.

2, high (low) water tank temperature

After the equipment is started, the developing and fixing temperature should reach the default value of the parameters. If the temperature of the liquid in the tank does not reach the set temperature, a fault display will appear.

(1) The operation panel displays “WASHTEMPLOW”, indicating that the water tank temperature is low. Generally, the temperature of the operating room is 26 degrees, and the set temperature of the water tank is 40 degrees. After normal startup, the heating rod and circulation system start to work. If the circulatory system works normally and the temperature always goes up, it should be that the receiving rod is burned out and the heating rod can be replaced.

(2) The operation panel shows “WASHTEMPHIGH”, the tank temperature is high, mainly because the heating rod is working properly, the temperature of the liquid around the temperature sensor is more than 40 degrees, there is no circulation of the liquid in the tank. The main reason is that the maintenance of the equipment is not in place, and the impurities in the pipeline are not cleaned up. Pipes are clogged, resulting in poor water circulation. Clean the water tank with warm water several times, and use a high-pressure water gun to flush away the impurities remaining in the pipeline.