1. The voltage fluctuation of the power grid should be controlled between +10% and -15%, while the power supply in our country fluctuates greatly, the quality is poor, and there are hidden disturbances such as high-frequency pulses, plus human factors (such as sudden switch-offs). power outage, etc.). During the peak period of electricity, such as about an hour before going to work or off work during the day and at night, the deviation is often more than ±20%. Make the machine tool alarm and cannot work normally, and cause damage to the machine tool power system. Even lead to the loss of relevant parameter data and so on. This phenomenon has occurred in machine tools such as CNC machining centers or turning centers, and the frequency of occurrence is high, which should be paid attention to.
It is recommended to configure an AC voltage stabilized power supply system with automatic compensation adjustment function in a workshop where CNC machine tools are concentrated; a single CNC machine tool can be configured with an AC voltage stabilizer to solve the problem.
2. It is recommended to connect the mechanical and electrical equipment to a single power supply. If it is necessary to supply some parts of the electrical equipment with other power sources (eg electronic circuits, electromagnetic clutches), these power sources should, as far as possible, be taken from devices (eg transformers, transducers, etc.) that form part of the mechanical electrical equipment. For large and complex machines including many machines that work together in a coordinated manner and occupy a large space, more than one incoming power supply may be required, depending on the configuration of the site power supply.
Unless the mechanical electrical equipment uses a plug/socket to connect directly to the power source, it is recommended that the power cord be connected directly to the power terminal of the power disconnect switch. If this is not possible, a separate terminal block should be provided for the power cord.
The handle of the power cut-off switch should be easily accessible and should be installed between 0.6 and 1.9m above the easy-to-operate position. The upper limit is recommended to be 1.7m. In this way, power can be quickly cut off in the event of an emergency, reducing losses and casualties.
3. The requirements of CNC equipment for compressed air supply system CNC machine tools generally use a lot of pneumatic components, so the workshop should be connected to a clean and dry compressed air supply system network. Its flow and pressure should meet the requirements. The compressed air machine should be installed away from the CNC machine tool. According to the layout of the factory building and the amount of gas consumption, it should be considered to install refrigerated air in the coal machine, air filter, gas storage tank, safety valve and other equipment for the compressed air supply system network.
4. The requirements of CNC equipment for the working environment Precision CNC equipment generally has requirements for a constant temperature environment. Only under constant temperature conditions can the machine tool accuracy and processing degree be ensured. Generally, ordinary CNC machine tools have no specific requirements for room temperature, but a lot of practice shows that when the room temperature is too high, the failure rate of the CNC system is greatly increased.
A humid environment will reduce the reliability of CNC machine tools, especially in a humid environment with large acid gas, it will cause corrosion of printed circuit boards and connectors, and electrical failures of machine tools will also increase. Therefore, some users in southern China have measures to dehumidify the CNC machine tool environment in summer and rainy seasons.
1) The temperature of the working environment should be between 0 and 35 °C, to avoid direct sunlight on the CNC machine tool, and the room should be equipped with good lighting equipment.
2) In order to improve the accuracy of the machined parts and reduce the thermal deformation of the machine tool, if conditions permit, the CNC machine tool can be installed in a relatively closed workshop with air conditioning equipment.
3) The relative humidity of the working environment should be less than 75%. CNC machine tools should be installed in places away from liquid splashes and to prevent leakage in the workshop.
4) Keep away from the environment with excessive dust and corrosive gas.
