J2168B offset printing machine failure

At the end of 1997, the factory sent me to a county printing plant to help solve the paper feeding failure of the J2108B offset press. At the scene, it was observed that the time for the paper to reach the front gauge was sometimes fast, sometimes slow, and sometimes just right. If you move other parts, it will change many times.

At that time, when the machine was turned on, he took a few sheets of paper and found that the paper was slow to reach the front, and the distance to the mouth was about 5 cm. Through the adjusting belt, paper feed roller, paper feeding roller, paper feeding nozzle, etc., the paper still does not accurately reach the front gauge, and after a few times, the position of the gear clutch shaft end gear slot is adjusted several times so that the paper advance time is advanced. , The paper reached the former rule more accurately, but there is still a small part of the paper that does not reach or pass the position. After opening and stopping more than one thousand sheets, the paper suddenly became faster, and the mouth was more than 5cm above the front gauge, and the position of the long gear hole on the gear end of the transmission clutch was retuned to allow the paper to go but the paper bear arrived more accurately. The former rule, it took one morning, the paper became invaded three or four times faster, and the position of the long hole of the gear shaft end of the transmission clutch also changed. Incredibly, after the long hole position was tightened and fixed, it could not change so quickly. Where is the key reason? Once, the paper has passed more.

I press the Stop Feed button to turn the paper feed pump off. At this time, several sheets of paper left on the paper transport table were more accurately passed, and they were tested several times. It was found that the paper was opened, the paper was fast, the paper was turned off, and the paper moved more accurately. It was estimated that the problem was blowing. Gas and suction, open the air pump pump air bag. It was found that the main air inlet filter and the replenishing air filter basically all filled with dust, the air inlet and the air flow of the air pump were not smooth, they were cleared, and then the paper was turned on and was basically normal, and the drive was slightly adjusted again. The clutch shaft gear long hole position speed 6500 / h, feeding completely normal. For more than one month after the system was switched on, it was reported that there has been no change in the way the paper was taken. (Guangxi Zhaolin Linjiang Printing Technology Branch Zhao Feng)