There may be some faults in the process of bus processing. The analysis process of the electrical fault of the bus machine is also the process of troubleshooting. Therefore, some common troubleshooting methods for the electrical fault of the bus machine. Let's take a look at it:
1. Power supply: The power supply is the energy source for the normal operation of the maintenance system and even the entire machine tool. Its failure or minor fault will lose data and cause downtime. In severe cases, it will destroy part or even the entire system.
Due to the sufficient power and high quality of the power grid in western countries, the power supply design of their electrical systems is less considered, which is slightly insufficient for the power supply network with large fluctuations and high-order harmonics in my country. factors, it is inevitable that there will be failures caused by the power supply.
Second, the CNC system position loop failure
1. The position loop alarm. It may be that the position measurement loop is open; the measuring element is damaged; the interface signal established by the position control does not exist, etc.
2. The coordinate axis moves without a command. It may be that the drift is too large; the position loop or the speed loop is connected to a positive feedback; the feedback wiring is open; the measuring element is damaged.
3. The machine tool coordinate cannot find the zero point. It may be that the zero direction is far from the zero point; the encoder is damaged or the wiring is open; the grating zero mark is shifted; the zero return deceleration switch fails.
Fourth, the dynamic characteristics of the machine tool become worse, the processing quality of the workpiece decreases, and the machine tool even vibrates at a certain speed.
One of the larger ones may be caused by excessive clearance of the mechanical transmission system or even serious wear or insufficient lubrication of the guide rails or even wear;
For the electrical control system, it may be that the speed loop, position loop and related parameters are no longer in the best matching state, and should be re-optimized and adjusted after the mechanical fault is basically eliminated.
5. Occasional downtime failures.
There are two possible cases here:
One case is that the problems in the design of the relevant software as mentioned above cause the shutdown failure under some specific operation and functional operation combinations, and generally the machine tool will disappear after the power is turned off and the power is turned on again;
Another situation is caused by environmental conditions, such as strong interference (power grid or peripheral equipment), excessive temperature, excessive humidity, etc. This environmental factor is often ignored by people, such as placing machine tools in ordinary workshops or even in southern regions. Near the open door, the electric cabinet runs with the door open for a long time, and there are a large number of equipments that generate dust, metal chips or water mist nearby, etc.