Having worked in the video measuring equipment field for over 20 years, from initial installation and debugging to solving various measurement accuracy issues for customers, I have found that what truly determines measurement stability and precision is the mechanical foundation of the equipment. Nowadays, many measuring machines boast abundant software features and attractive interfaces, but in my opinion, the key to long-term stable and accurate performance lies in the base and motion structure.

I have always insisted on using granite for the base and the beam. Granite is a natural dense and stable material that, after precision grinding, has an extremely flat surface. More importantly, it has a very low thermal expansion coefficient, so even when the workshop temperature varies by 20 to 30 degrees between summer and winter, the machine structure barely deforms. For example, I once serviced a factory using a steel-structured measuring machine; the same batch of parts measured in summer and winter differed by 5 to 10 microns. After switching to a machine with a granite base, the seasonal measurement drift basically disappeared. For parts with tolerances of just a few microns, this difference is critical for quality compliance.

Besides the base, I also pay close attention to using granite for the beam. Some manufacturers save costs by using granite only for the base while making the beam from aluminum or steel. While the new machines may perform well initially, after two or three years, micro deformations of the beam become noticeable under high-magnification lenses, causing unstable optical axes. I recall a customer who manufactured metal mid-frames for smartphones and frequently had unstable measurement data. The issue was traced to beam deformation due to material choice. After switching to granite beams, the problem was resolved, and the data stabilized significantly.

In summary, the stability of the granite base and beam, combined with the gantry motion structure designed for light moving parts and a stable worktable, is key to ensuring long-term high precision in video measuring machines. Customers who have used my equipment have maintained factory-level accuracy even after five years, making it a worry-free investment. When choosing equipment, don’t focus solely on surface features; the fundamental mechanical structure is essential. In the future, I will share more about daily maintenance and care to help everyone keep their machines running longer.