What Is Precision?

Accuracy refers to the degree of closeness between two or more measured values. If the measured values are close to each other, the measurement result of the machined part is accurate. Accuracy is one of the most fundamental concepts used in machining. It measures the variance range or distribution between data points in a dataset. High precision refers to measuring values or results that are similar to low precision, with results scattered throughout the map.

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Taking the bullseye as an example, if multiple measurements are concentrated below the bullseye, then they are an accurate dataset. However, as they are not located near the center, they are not entirely accurate. However, we can conclude that if these measurements are concentrated around the bullseye, they are accurate.

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Processing accuracy refers to the repeatability or reproducibility of multiple components with similar dimensions during manufacturing. Precision CNC machine tools are the core of modern industry because they directly affect the reproducibility, efficiency, and accuracy of machining. The demand for processing micro products or components with micro complex features has significantly increased.

Meanwhile, large-scale machining of CNC parts requires more precise design techniques and machining dynamics to meet customer requirements. Therefore, accuracy is the primary task in machining operations, as it represents the ability of the manufacturing process or machine to continuously reproduce almost accurate dimensions of machined parts over a long period of time.