In CNC machining, precision is primarily impacted by which of the following?

Precision in CNC machining is primarily influenced by the operator's experience because skilled operators possess a deep understanding of the machine and its capabilities, as well as the intricacies of the machining process. Experienced operators are more adept at setting up the machine properly, choosing the right tools, selecting the optimal machining parameters, and making adjustments based on real-time feedback during the machining process. This expertise allows them to produce parts that meet stringent specifications with a high degree of accuracy.

While factors such as the material being machined, the quality of the machine itself, and even the environment can play roles in the overall precision, it is the operator's knowledge and skills that most directly affect the ability to achieve tight tolerances and accuracy in the final product. Operator experience encompasses training in measuring techniques, understanding tool wear, and familiarity with machining operations, all of which are critical in ensuring the final parts are produced to the desired specifications.