In CNC machining, what does the term "contour" refer to?

The term "contour" in CNC machining specifically refers to the overall shape or outline of the workpiece. It encompasses the geometry that the machining process aims to create on the material, including curves, angles, and other defining characteristics of the part being machined. Understanding the contour is crucial for programming CNC machines, as it directly influences toolpath strategies and machining parameters necessary to produce the desired shape accurately.

The other options, while relevant to the machining process, do not define "contour." Cutting speed pertains to how fast the tool moves through the material, depth of cut describes how deep the tool penetrates into the workpiece, and material type influences the choice of tools and speeds but does not denote the shape itself. Thus, the focus on contour emphasizes the importance of the workpiece's geometry in CNC machining operations.