NC is an acronym for Numerical Control and CNC is an acronym for Computer Numerical Control. The difference between NC and CNC is one of age and capability. The earliest NC machines performed limited functions and movements controlled by punched tape or punch cards. As the technology evolved, the machines were equiped with increasingly powerful microprocessors (computers) with the addition of these computers, NC machines become CNC machines. CNC machines have far more capability than their predecessor.
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