How to correctly establish the coordinate system of the image measuring instrument Metus software

Using a complex image measuring instrument and light source system, in order to finally obtain a correct inspection report, it is necessary to understand how to establish a correct part coordinate system. The purpose of establishing the coordinate system is to provide a reference direction for the size calculation when measuring parts. Usually, we establish the coordinate system based on the datum given by the engineer.

The establishment of the coordinate system is the basis for subsequent measurements. The establishment of the wrong coordinate system will directly lead to the error of the measurement size. If you want to get the correct inspection report, you must understand how to correctly establish the coordinate system. The correct coordinate system is the basis for subsequent measurements. Establishing the wrong coordinate system will directly lead to the wrong inspection report. Therefore, it is very necessary and important to establish the correct reference direction. Usually, we don't create a coordinate system arbitrarily. When establishing the coordinate system, the characteristics of the coordinate system we choose to establish will have the following requirements: ①Meet the requirements of test parts; ②Meet the batch inspection of similar products, which can be repositioned; ③Meet the benchmark requirements of assembly, processing and design. After confirming that these requirements are correct, the operator of the image measuring instrument can establish a coordinate system. The general methods of establishing a coordinate system are wired coordinates, line-circle coordinates, circle-circle coordinates and four-sided quadrant () coordinates. This is the conventional method of establishing a coordinate system.