The engraving machine is a kind of precision processing equipment controlled by a computer. It is mainly used in engraving, cutting, drilling and other processing techniques of various materials. In order to achieve more precise and efficient processing, CNC engraving machines usually need to be equipped with frequency converters as one of their driving devices. In this article, we will discuss the application of frequency converters on CNC engraving machines, including its principles, functions, advantages and precautions.

1. Principles and functions of frequency converters

  The frequency converter is an electronic device used to change the speed of a motor. Its main function is to convert fixed-frequency alternating current into an adjustable-frequency power supply, thereby enabling the motor to achieve speed control. On engraving machines, frequency converters are usually used to control the speed of the spindle motor to meet the requirements of different processing techniques.

The principles and functions of the frequency converter are as follows:

1. Principle

  The frequency converter modulates the input power through electronic devices and converts it into AC power with adjustable frequency. The frequency converter contains a power converter, an intermediate capacitor, an inverter and a control circuit. The power converter converts the input AC power into DC power, and then filters and stores it through the intermediate capacitor. Finally, the inverter converts the DC power into AC power with adjustable frequency and outputs it to the motor.

2. Function

  The main function of the frequency converter on the CNC engraving machine is to realize the speed control of the motor. By changing the power frequency output by the inverter, the motor speed can be controlled to adapt to different processing requirements. In addition, the frequency converter also has the following functions:

(1) Overload protection: When the motor load is too large or the working environment is abnormal, the inverter will automatically stop to protect the motor and equipment.

(2) Soft start: When starting the motor, the frequency converter can slowly accelerate the motor to avoid instant overload or impact load on the motor.

(3) Low noise: The inverter can reduce the noise and vibration of the motor by adjusting the output frequency and voltage.

(4) Energy saving: By adjusting the operating parameters of the motor, the inverter can achieve energy saving effects and reduce energy consumption and costs.

2. Advantages of frequency converters on engraving machines

Using frequency converters on engraving machines has the following advantages:

1. High precision: The frequency converter can achieve precise speed control to meet different processing requirements.

2. High efficiency: The frequency converter can adjust the operating parameters of the motor to achieve high-efficiency processing and reduce costs.

3. Energy saving and environmental protection: Frequency converters can achieve energy saving effects and reduce energy consumption and environmental pollution.

4. Low sound: The frequency converter can reduce the noise and vibration of the motor and improve the comfort of the processing environment.

5. High reliability: There are multiple protection mechanisms inside the frequency converter to avoid damage to the motor and equipment.

3. Precautions

When using the frequency converter on the engraving machine, you need to pay attention to the following items:

1. Select the appropriate inverter model and parameters to meet the working requirements of the motor.

2. When installing and wiring, you need to follow the instructions of the inverter to avoid misoperation or improper installation.

3. When using the frequency converter, you need to pay attention to the load condition of the motor to avoid overload or overtemperature.

4. After long-term operation, inspection and maintenance are required to ensure the normal operation of the inverter and motor.

4. Development Trend

  With the widespread application and continuous development of CNC engraving machines, frequency converters will continue to be upgraded and improved to meet more precise and efficient processing needs. In the future, frequency converters will be more intelligent and automated, achieving more intelligent speed control and management through linkage with computers and control systems. At the same time, with the continuous emergence of new materials and new processes, frequency converters will continue to innovate and evolve to adapt to more complex and high-end processing requirements.