Power System and Fault Diagnosis of CNC Lathe Machining

For CNC lathe processing enterprises, power control is an important part of CNC system hardware, and it is also a frequent problem in CNC system maintenance. Let's see what power systems are available in the image below!

1. Battery powered

When the machine tool is powered off, since some information in the numerical control equipment needs to be saved, some RAM areas use batteries to save data. Most of these batteries It is a lithium battery, which has a long life but low power.

This part of the battery in CNC lathe processing enterprises can also be replaced by ordinary batteries reduced to the required voltage value by diodes, but the service life must be paid attention to. When replacing the battery, the power supply must be installed, otherwise the data will be lost, which is different from the usual habits, so be careful not to short-circuit when replacing the battery.

2. AC power supply

AC is a device that provides energy for the control system, and is also a device that provides energy for the servo drive. It has a variety of protection and switching devices such as short circuit, isolation, and voltage loss protection.

When the AC power supply supplies power to the servo system, be sure to pay attention to the power phase sequence of the installed thyristor device. Once the program is connected incorrectly, the synchronization relationship with the thyristor device will be lost, resulting in failure.

3. DC power supply

The DC power supply used for control is mostly switching power supply, with +5 V, +24 V, Voltages such as ±15 V, and the voltage of each device is different. For example, some of the power supply voltages on the CRT are 24 V, and some are AC 110 V or 220 V.

Therefore, CNC lathe processing enterprises are optimistic about the requirements of the power supply voltage of each terminal as much as possible. The power supply is important, and a failure will result in irreparable losses. There is also a servo-powered DC voltage, which is mainly obtained by a servo transformer and a rectifier.

The above is the power supply system commonly used by CNC lathe manufacturers. Let's take a look at the common fault diagnosis in CNC lathe processing?

1. Practical diagnosis technology

This is the fault diagnosis of CNC machine tools by maintenance personnel through their own sense organs and experience. The diagnostic procedures of applying practical diagnostic techniques are different due to different types of faults. Various methods are in no particular order and can be interspersed or carried out simultaneously. Only by comprehensive analysis can better results be achieved. Practical diagnostic techniques do not require complex and expensive instruments, and can be diagnosed anytime, anywhere, and are fast, convenient and accurate, especially for the initial diagnosis of machine tools.

2.Modern diagnostic technology

This is a kind of use of diagnostic instruments and data processing technology to detect vibration, noise, temperature of mechanical equipment The method of measuring and other characteristic parameters, the CNC lathe manufacturer compares the measured value with the specified value to judge whether the working state of the mechanical device is normal, so as to predict and predict the operating state of the mechanical device; and further to the cause of the failure , position and the severity of the fault for qualitative and quantitative analysis. Using modern diagnostic technology, the fault location can be found and repaired in time in the early stage of mechanical equipment failure, so as to avoid further damage to mechanical parts. At present, modern diagnostic technology is being promoted and applied continuously.

3. Diagnose electrical system faults

CNC CNC lathe processing manufacturers investigate, analyze and diagnose the electrical system faults of CNC CNC lathes The process is to investigate, analyze and diagnose the fault, so its fault diagnosis method is particularly important.