You can observe whether the oil circuit of the machine is unblocked through the oil standard. If there is no oil in the oil standard or the oil standard is not clearly observed, you should stop emergency and check whether there is oil leakage in the oil circuit. Although oil leakage from the machine is easy to observe, it is difficult to find the cause. For machines using sliding bearings, low speed is not conducive to its lubrication, especially jog or low-speed operation has a greater impact on its lubrication. Therefore, before carrying out such operations, it is best to run the machine idling and lubricate, which is also a primary task that should be done every day before going to work. The oil pump of some machines is driven by the main engine, so when it is reversed, the oil circuit will not only not be able to refuel, but will suck the oil from the oil circuit back to the tank. This is very dangerous, so the reverse should be avoided. The lubrication of some important parts can also be detected by the temperature of the metal nearby. If the temperature is too high, it indicates that there is a problem with the lubrication. Common faults and troubleshooting of gravure gold and silver ink.