The three-dimensional coordinate measuring instrument is also called the Three-Dimensional coordinate measuring machine and three-dimensional element measuring instrument. The three-dimensional coordinate uses the geometric space characteristics, uses the X, Y, and Z axes to measure the theoretical position and size of the workpiece, compares it with the actual position and size of the workpiece, and obtains the error. The CMM is widely used in the machining industry because of its accurate measurement. The CMM mainly measures the accuracy of the size, positioning, and geometry of the workpiece. What size measurements can the CMM do?
If you want to know which dimensions can be measured by the CMM, you should start with the three-axis movement of the CMM. In fact, the dimension measurement range is the travel range of the three-axis movement and the position that can be measured by the probe within a large range when the probe is installed. Although the measuring depth of the CMM can be increased when the probe is added with an extension rod, it can even detect the dimensions outside the travel range, However, the increase of the extension rod will reduce the accuracy and increase the measurement error.
The three coordinate measuring instrument can measure the basic three elements of point, line, and surface, measure the dimensions of ball shape, cylinder shape, cone shape, and so on, and also measure the curves. After the analysis of the software, digitize the dimensions, display them with numbers, and then process the geometric quantities by computer, which can be conducive to better control.
Generally speaking, the CMM can measure a wide range of dimensions, ranging from aerospace parts to gears of ordinary machinery. It is better to say which dimensions cannot be measured than which dimensions can be measured by the CMM.
