With the rapid development of high-speed machining technology, part of the operation data, setting data and processing program of the NC system of 3D drill are generally stored in RAM memory. After the system is powered off, it is maintained by the backup battery or lithium battery of the power supply. As a result, the shutdown time of 3D drilling machine is relatively long, and the data loss may be caused by plugging and plugging the power supply or memory, so that the system can not run. At the same time, because the 3D drill uses three-phase AC 380V power supply, safety is also an important part of the pre installation work of the 3D drill. Based on the above reasons, the following requirements are required for the power supply used by the 3D drill: < br style = "list style type: none; "/ > 1. The fluctuation of power grid voltage should be controlled between + 10% and - 15%. However, China's power supply fluctuates greatly and its quality is poor. There are also hidden interferences such as high-frequency pulse and artificial factors (such as sudden switch off and power failure). During the peak period of electricity, such as one hour or so before going to work in the daytime or at night, there are often many out of tolerance, even up to & plusmn; 20%. The machine tool accessories alarm and can not work normally, and damage the 3D drilling power system. Even lead to the loss of relevant parameter data. This phenomenon has occurred in CNC machining center or turning center and other machine tools, and the frequency is high, so we should pay attention to it. It is suggested to connect mechanical and electrical equipment to a single power supply. If some parts of electrical equipment (such as electronic circuit, electromagnetic clutch) need to be supplied by other power sources, these power sources should be taken as far as possible from the components (such as transformers, transducers, etc.) that are part of the mechanical and electrical equipment. For large and complex machinery, including many machines that work together in a collaborative manner and take up a large space, more than one power supply may be required, which depends on the configuration of the site power supply. The handle of the power cut-off switch should be easily accessible and should be installed between 0.6m ~ 1.9m above the easy operation position. The upper limit value is recommended to be 1.7m, which can quickly cut off power in case of emergency and reduce loss and casualties. < br style = "list style type: none;" / > according to the requirements for compressed air supply system of 3D drill, many pneumatic components are used in 3D drill, so clean and dry compressed air supply system network shall be connected to the workshop. The flow rate and pressure shall meet the requirements. The compressed air machine should be installed far away from the CNC machine tool. According to the layout of the plant and the gas consumption, it is necessary to install chilled air in the coal machine, air filter, air storage tank, safety valve and other equipment for the compressed air supply system network. < br style = "list style type: none;" / > the requirements of 3D drilling for working environment. The precision CNC equipment generally has the requirement of constant temperature environment. Only under the constant temperature condition can the accuracy and machining degree of the machine tool be ensured.