Now that the penetration rate of automation equipment in the enterprise is getting higher and higher, and the rate of equipment failure is also increasing synchronously, today the author introduces several common methods for
Automatic Equipment fault detection.
1. Check all power sources and air supplies of automation equipment.
Power supply, air supply problems often lead to failure of automation equipment. Such as power supply problems, including the entire workshop power supply failure, such as low power supply, insurance burned, poor contact with the power plug, etc.; air compressor is not open, pneumatic triple or two pieces are not open, the flow restrictor is closed and so on. The following aspects should be included in the detection of automation equipment: power supplies, including the power supply for each device, and the power source for the workshop's power supply and pneumatic devices required for pneumatic devices.
2. Check if the position of the sensor of the automation equipment is offset.
Due to the carelessness of the equipment maintenance personnel, there may be some errors in the location of some sensors, such as failure to place, sensor failure, and sensitivity failure. Always check the sensor's sensing position and sensitivity, and adjust the deviation in time. If the sensor is broken, replace it immediately. Many times, in addition, due to the vibration of the automation equipment, most of the sensors will loosen after a long period of use. Therefore, during routine maintenance, the sensors should always be checked for correct position and firmness.
3, check the automation equipment relays, current limiter, pressure reducing valve.
Like relays and magnetic sensors, long-term use will also occur when the ground iron sticks, and thus can not guarantee the normal electrical circuit, need to be replaced. In the air circuit system, the pressure regulating spring of the flow restrictor and the pressure reducing valve will also loosen or slide with the vibration of the equipment. These devices, like sensors, are components that require routine maintenance in automation equipment.
4, check the electrical, solenoid valve, air circuit connection internal components.
If no problems are found in the above three steps, check all loops. Check if the wire in the circuit is open circuit, especially if the wire in the wire slot is broken due to pulling. Inspect the air tube for damaged creases or cracks. If the airway is severely creased or cracked, replace it immediately.
5, check whether the solenoid valve commutation action.
Solenoid valve is electromagnet sucking the valve core to make the cylinder commutation, when the electromagnet fails, the valve core does not move, resulting in the cylinder can not move. If there is much water in the air circuit and there is a lot of dust, it will also cause the spool to jam and block, which will cause the cylinder to fail to operate.
6, after ensuring that the above steps are correct, the fault may appear in the controller of the automation equipment, but it can never be a program problem.
First of all, do not be sure that the controller is destroyed. As long as there is no serious short circuit, the controller is internally short-circuit protected. A general short circuit will not burn the controller.
July 22, 2021
