Common Failure Detection
Any automated machinery is composed of three parts: the actuator, the sensor part, and the controller part. When the automated equipment suddenly malfunctions and doesn't work, or the working sequence is out of order, it is necessary to carry out troubleshooting. Here we are from the three parts of the composition of the equipment to understand the method of diagnosing automation equipment failure.
1. Check all power, gas and hydraulic sources of the automated machinery.
Problems with power, air, and hydraulic sources often cause automation equipment to fail. For example, power supply problems, including the failure of the entire workshop power supply, such as low power, insurance burned out, poor contact with the power plug, etc.; air or hydraulic pump is not open, pneumatic triplex or duplex is not open, the hydraulic system in the relief valve or some pressure valves are not open, etc.. Detection of automation equipment should include the following aspects:
Power supply, including the power supply of each piece of equipment and workshop power electricity.
Gas source, including the air pressure source required for pneumatic devices.
Hydraulic source, including the work of the hydraulic pumps needed for the hydraulic devices of automation equipment.
2. Check the sensor position of the automation equipment for offset.
Due to the negligence of equipment maintenance personnel, there may be errors in the location of certain sensors, such as not in place, sensor failure, sensitivity failure, etc.. It is necessary to frequently check the sensing position and sensitivity of the sensor, deviation in time to adjust, the sensor if broken, immediately replaced. Often, in addition, due to the vibration of automation equipment, most of the sensors after long-term use, there will be a loose position, so in the daily maintenance should always check the sensor position is correct, whether it is fixed firmly.
3. Check the relays, flow control valves, and pressure control valves of automation equipment
Relays, like magnetic inductive sensors, will have a sticky hitch after a long period of time, which will not ensure the normal electrical circuit and need to be replaced. In pneumatic or hydraulic systems, throttle valve openings and pressure regulator springs for pressure valves can also loosen or slip with the vibration of the equipment. These devices, like sensors, are components in automation equipment that require routine maintenance.
4. Check electrical, pneumatic, and hydraulic circuit connections
If none of the above three steps reveal any problems, then check all circuits. Look for breaks in the wires in the circuits, especially in the wireways to see if the wires have been cut by the wireways due to pulling. Check the air lines for damaging creases. Check for clogged hydraulic fluid lines. If the air hose is severely creased, replace it immediately. Replace the hydraulic hose as well.
5. 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 has not been a serious short-circuit, the controller has an internal short-circuit protection, general short-circuit will not burn the controller.
Development prospects
Automated machinery is widely used in industry, agriculture, military, scientific research, transportation, commerce, medical care, services and family. The use of automation technology can not only liberate people from heavy physical labor, part of the brain labor and poor, dangerous working environment, but also expand the function of human organs, greatly improve labor productivity, enhance human understanding of the world and the ability to transform the world.