There are many reasons why all the nozzles of the photo machine don't print ink. First, the overall situation: 1, the piezoelectric photo machine does not print ink. Maybe the machine has been left for a long time and the nozzle is dry. If you clean it, it depends on what ink you have. Water-based solvents can be directly soaked in water, and weak solvents can be washed with washing liquid. After soaking, inject clean water or cleaning solution into the nozzle with a needle. Be careful not to use too much force when injecting water. If you hit hard, it's easy to blow off the nozzle. The second is to look at the ink absorption of the ink station. If the ink absorption is normal, you can make a test to see what the test paper looks like. If it is black, the nozzle may burn out. 2. For the foaming photo machine, first check whether the nozzle is burnt out, and switch between the nozzle that does not produce ink and the nozzle that produces ink, and see the test results. If there is no ink after switching, the nozzle should be burnt out. If ink is generated, check the contact tape. If ink is not generated on the whole, please check the version of the trolley. Second, the refinement situation: 1, the influence of static electricity, too high static electricity will also affect the ink output of the printer nozzle. 2. Ink system leaks. When there is too much air in the ink tube or the ink tube and nozzle leak air, the nozzle will not produce ink. It is necessary to check the nozzle and ink pipeline, drain the leaking part, and then suck the nozzle with an ink pump. 3. There are different solutions to the problem that a single nozzle does not print ink and all nozzles do not print ink. When the single nozzle of the camera does not discharge ink, it is judged whether there is a problem with the contact piece after the contact is cross-transposed and cleaned. If there is no problem in contact, it can be judged that it is burnt out or the nozzle is blocked. If fixing a color often blocks the nozzle, it may be the ink itself. You can contact the ink supplier. 4. All nozzles don't spray ink, and there is a problem with one nozzle, which affects other nozzles. Clean them out one by one, or there is something wrong with the ink car board. For example, the most common reason is that one of the four nozzles fails, affecting the other nozzles, resulting in no ink in all four nozzles. The solution is to isolate any three nozzles from the contact zone with a piece of paper the size of nozzle circuit. However, a cleaning test is performed to find out the bad nozzle that does not generate ink, and then it can be replaced. 5. If the luggage case of the camera is damaged, you can replace it with a new luggage case. 6. Ink problem: the nozzle is blocked and inferior ink is used. The particles in the ink are too large, and a layer of impurities is formed on the filter screen of the nozzle over time, so that the ink cannot flow into the heating chamber smoothly, resulting in no ink from the nozzle. It can often be solved by sucking the nozzle with an ink pump. If it is serious, it is necessary to suck pure water with a syringe, inject it into the nozzle, then shake the nozzle and suck it out with the syringe several times to achieve the purpose of removing impurities. 7. The amount of ink pre-added in the nozzle is not standardized. Too much or too little will lead to the situation that the nozzle can't print ink. The standard practice is to add about 20-25ml of ink in advance. 8. The last situation: the nozzle is broken (burnt out). In this case, there is no choice but to replace the nozzle with a new one.