Programming all operations required to measure a part in their execution sequence and storing them as files on a disk. During measurement, the three-coordinate measuring machine is automatically controlled by running the program. This method is known as the programmed measurement method for a three-coordinate measuring machine and is suitable for the repeated measurement of batch parts. The structure of the part measurement program generally includes the following contents:

(1) Program initialization. This includes setting filenames, initializing memory, and providing selection instructions for conditions that differ from the default settings.

(2) Probe and Part Management: such as probe definition or re-calibration, temporary zero-point definition for CNC machine shops, mathematical alignment, establishing a permanent origin, etc.

(3) Measurement Cycle: ①Positioning, ensuring the probe enters the positioning point before the next sampling point (to avoid collision with workpieces when the probe approaches the sampling point); ②Sampling processing, including preparatory commands and operational commands, such as providing commands for the number of sampling points, theoretical coordinates of the hole axis, and diameter before the measurement command for the hole; ③Processing of measurement values; ④Closing the file, ending the entire measurement process.