The CNC system of Dongguan CNC machining factory is the core part of CNC machine tool. Therefore, the maintenance of CNC machine tool is mainly the maintenance of numerical control system. After a long period of use, the performance of electronic components should be aged or even damaged. Some mechanical parts are especially so. In order to prolong the life of components and parts and wear cycle of parts as much as possible, to prevent various faults, especially the occurrence of malignant accidents, it is necessary to carry out daily maintenance on the CNC system. In summary, the following aspects should be paid attention to.
1. formulate rules and regulations for daily maintenance of CNC system
Dongguan CNC processing factory determines the respective maintenance regulations according to the characteristics of various parts. If it is clearly specified which places need to be cleaned every day (such as the cleaning of input / output unit of CNC system - photoelectric reading machine, check whether the mechanical structure part is well lubricated, etc.), which parts shall be inspected or replaced regularly (such as the brush and commutator of DC servo motor shall be checked once a month).
2. the doors of numerical control cabinet and strong current cabinet shall be opened as little as possible
Because in the air of machining workshop, there are oil mist, dust and even metal powder. Once they fall on the printed circuit or electrical parts in the CNC system, it will easily cause the insulation resistance between components to drop, even cause the damage of components and printed circuits. Some users open the door of the NC cabinet to heat the heat in order to make the CNC system work overload for a long time in summer. This is an unacceptable method, which will eventually lead to the accelerated damage of the numerical control system. The correct method is to reduce the external environment temperature of the numerical control system. Therefore, there should be a strict regulation, unless necessary adjustment and maintenance, it is not allowed to open the cabinet door casually, and it is not allowed to open the cabinet door when using.
3. clearing the cooling and ventilation system of the digital control cabinet at regular time
Dongguan CNC processing factory shall check whether all cooling fans on the NC system cabinet work normally every day. Check whether the air duct filter is blocked every half a year or every quarter according to the working environment. If the dust on the filter network is too much, it needs to be cleaned in time, otherwise, the temperature in the cabinet of the CNC system will be high (generally not allowed to exceed 55 ℃), causing overheating alarm or unreliable operation of the CNC system.
4. monitor the power grid voltage of CNC system frequently
The CNC system produced by Dongguan CNC processing factory allows the voltage of the power grid to fluctuate within 85% - 110% of the rated value. If it is beyond this range, the system will not work normally, and even damage the electronic parts in the CNC system.
5. replace the battery for memory regularly: there are two kinds of memory in the NC system
(1) Bubble memory that does not require battery retention.
(2) CMOS RAM devices that need to be maintained by batteries are provided with rechargeable battery maintenance circuit in order to keep the stored contents during the period of no power supply of the CNC system. When the CNC system is powered on, the +5v power supply is powered to CMOS ram through a diode and charged to the rechargeable battery; When the NC system cuts off the power supply, it is replaced by battery power supply to maintain the information in CMOS ram. In general, even if the battery has not failed, the battery should be replaced once a year to ensure the system can work normally. In addition, it is necessary to note that the battery replacement should be carried out under the power supply state of the CNC system.
6. maintenance of CNC system when it is not in use for a long time
CNC machine tools should not be sealed for a long time. After purchasing CNC machine tools, they should be fully utilized, especially in the first year of use, so that the weak links easy to fail can be exposed as early as possible and can be eliminated within the warranty period. In order to improve the utilization rate of CNC system and reduce the failure of CNC system, the CNC machine tool should be used at full load instead of idle for a long time. For some reason, when the CNC system is idle for a long time, in order to avoid the damage of the NC system, the following two points should be paid attention to:
(1) Dongguan CNC processing factory often power on the CNC system, especially in the rainy season with high environmental humidity. When the machine tool is locked and still, when there is no processing task, the CNC machine tool should also be powered on regularly, preferably 1-2 times a week,
(2) The machine can operate for about 1 hour each time, so as to reduce the humidity in the machine by using the heating capacity of the machine tool itself, so that the electronic components can not be damp, and whether battery alarm occurs in time can be found to prevent the loss of system software and parameters.