• June 21, 2024
  • Shatou, Changan, Dongguan, CN
CNC machine programming

How does CNC machine programming work?

CNC (Computer Numerical Control) machine programming is a method of machining by using a computer to control machine tools. This type of programming allows operators to use specialized software to create programs that instruct the machine to perform cutting, drilling, milling, and other processes along predetermined paths.

This article introduces the basic workflow and precautions of CNC machine programming in detail.

Basic Workflow of CNC Machine Programming

1. Design the CAD model

First, the designer uses computer-aided design (CAD) software to create a 3D model of the part. This model describes the geometry and dimensions of the part.

2. Select the cutting process

According to the requirements of the part, the operator selects the appropriate cutting process, such as milling, drilling, etc., and determines the required tool, tool path and processing parameters.

3. Write CNC program

Using special CNC programming software, the operator converts the tool path into CNC program according to the cutting process requirements. This program uses G-code and M-code to describe various motion, speed and operation instructions.

4. Transfer to CNC machine

Once the CNC program is written, the operator transfers the program to the CNC controller or CNC machine. This is usually done over a local network or a storage device such as a USB flash drive.

5. Install the workpiece

The operator fixes the workpiece to be processed on the machine table, and adjusts the clamping device as required to ensure the accurate position and positioning of the workpiece.

6. Run the processing program

Through the CNC controller, the operator starts the CNC program to control the machine to perform processing operations according to the predetermined path. The CNC controller interprets program instructions and sends signals to control drives, motors, and other ancillary equipment.

7. Inspection and adjustment

During the machining process, the operator will regularly check the quality and accuracy of the workpiece. If necessary, the program can be fine-tuned and adjusted according to the actual situation.


  • Make sure that the coordinate systems of the machine tool and workpiece are set correctly to ensure the correct execution of the program.
  • Check the correctness of cutting tools and cutting data to avoid tool damage or poor machining.
  • Check errors and conflicts in CNC programs to avoid mechanical collisions or accidents.
  • Regular maintenance and maintenance of machine tools to ensure the normal operation and accuracy of the machine.
  • For complex machining operations, simulation and verification can be performed first to ensure the accuracy and reliability of the program.


CNC machine programming is an integral part of modern manufacturing, revolutionizing the production process. It not only improves production efficiency and precision, but also greatly simplifies the machining process. Through reasonable programming and good operation, CNC machines can realize various complex parts processing to meet the continuously developing market demand.

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