An important step in the process of using a laser marking machine is to adjust the focal length of the laser marking machine. The current method of adjusting the focal length of the laser marking machine is nothing more than lifting the resonant cavity and lifting the table.

The current mainstream is the lifting of the worktable. The mechanical principle is that the four corners of the flat surface of the worktable are supported by four light circles with a screw in the middle. A pair of bevel gears are turned by 90 degrees and a handle is rotated at the front of the table to adjust the height of the table. This mechanism is relatively complex in principle and has many parts, especially between the four light circles and the guide sleeve and the screw. Due to the processing accuracy problem, it is easy to cause the smoothness during the lifting process. More importantly, the mechanical strength of such a mechanism is very poor, and it is not suitable for heavy workpieces. Long-term use will cause the plane of the laser marking machine to twist.

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