The technique uses the current x / y galvanometer configuration and applies it to the z-axis, and is usually fixed to the laser beam output end of the laser beam expander, is mounted on a sliding electronic galvanometer, which enables the lens Farther or closer to the laser output. As the beam expander moves toward the laser output, the focus of the laser beam also moves. In practice, this creates a field of z-axis in which the laser can freely mark any surface, provided that the surface should be within ± 21mm of the original focus position. This increased flexibility allows these units to be able to mark many of the surface types that can not be handled before, such as cylinders, spheres, ramps and multilayer parts, without any reduction in accuracy and speed.
The three-axis control technology described above may be used in other industrial materials processing, for example, cutting gates of injection molded parts, pruning rubber-wrapped thick cables, and cutting out a wide range of patterns on fabrics or thin plastic sheets.