Numerical control is a form of programmable automation in which the mechanical actions of a piece of equipment are controlled by a program containing coded alphanumeric data, the data representing relative positions between a work head and a work part:

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Numerical control (NC) indeed refers to the automation of machine tools that are operated by precisely programmed commands encoded on a storage medium, as opposed to controlled manually via hand wheels or levers, or mechanically automated via cams alone. The program contains alphanumeric data that directs the actions of the machine and its parts, such as a cutting tool and the workpiece, to perform specific manufacturing tasks with high precision.

Numerical Control Is a Form of Programmable Automation in Which