Classification of Coordinate Measuring Machines

Coordinate measuring machines, commonly known as CMMs, are widely used in various industries to measure the dimensions and geometrical features of complex objects with high accuracy and precision. They are essential tools for quality control, inspection, and reverse engineering processes. Based on their construction and operating mechanisms, CMMs can be classified into three main categories: bridge-type, cantilever-type, and gantry-type.

Bridge-type CMMs

Bridge-type CMMs are the most common type of CMMs and have a bridge-like structure that supports the moving X- and Y-axis probes. The bridge is fixed at one end and moves along the machine's base, while the Z-axis probe moves up and down on a vertical column. Bridge-type CMMs are well-suited for measuring small to medium-sized parts with high precision and accuracy. They are also relatively compact and easy to operate, making them ideal for use in production lines.

Gantry-type CMMs

Gantry-type CMMs have a gantry-like structure that supports the moving probes. The gantry moves along the X-axis, while the Z-axis probe moves up and down on the vertical column. Gantry-type CMMs are designed to measure large and heavy parts with high accuracy and precision. They are commonly used in the aerospace, automotive, and shipbuilding industries.

In conclusion, the selection of a CMM depends on the specific needs and requirements of each industry and application. Bridge-type CMMs are best suited for small to medium-sized parts, while gantry-type CMMs are ideal for measuring large and heavy parts with high accuracy. By understanding the characteristics of each type of CMM, industries can make informed decisions in selecting the appropriate CMM for their measurement needs.