The control power supply is an important component of the hardware of a CNC system, and it is also a part that often encounters problems during maintenance. The power system of CNC lathe manufacturers has two parts: AC and DC.
(1) AC power supply. It is a device that provides energy for both the control system and the servo drive. There are also various protection and switching devices on the AC power supply; Equipped with short-circuit, isolation, and voltage loss protection. When supplying power to the servo system with this AC power supply, it is important to pay attention to the power supply phase sequence of devices with thyristor devices. Once the program is connected incorrectly, the thyristor devices will lose synchronization and cause faults.
(2) DC power supply. DC power supply is mostly used as a switch regulated power supply for control, with voltages of+5V,+24V, ± 15V, etc. The voltage situation of each device is different, for example, the power supply voltage on CRT may be 24V, while others may be AC 110V or 220V. Therefore, CNC lathe manufacturers should pay as much attention to the requirements for the power supply voltage of each terminal as possible. Power supply is very important, and any errors can cause irreparable losses. There is also the DC voltage for servo power supply, which is mostly obtained through servo transformers and rectifier devices.
(3) Battery power supply. Due to the fact that some information in the CNC device needs to be maintained when the machine tool is powered off, a portion of the RAM area uses batteries for data retention. Most of these batteries are lithium batteries with long lifespan but low battery capacity. CNC lathe manufacturers can also replace these batteries with ordinary batteries by reducing the voltage to the required value through diodes, but it is important to pay attention to their lifespan. The battery must be replaced with power on, otherwise data will be lost, which is different from conventional habits. When replacing, attention should be paid to avoiding short circuits.