Through precise program control, the grinding head or cutting tool moves along complex 3D trajectories to achieve accurate material removal from the workpiece. Digital design and programming are performed first; based on the tool path, workpiece clamping and positioning are taken into account. Suitable tools and optimized grinding parameters are selected according to material properties and requirements. Real-time monitoring and dynamic compensation technologies are critical during processing. Engraving demonstrates unique advantages in machining special-shaped parts, including high precision, complex shape forming capability, and excellent surface quality control.