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As its name clearly states, CNC (computer numerical control) is automated control of machining tools using a computer. Yet, that doesn鈥檛 just happen; it requires the right coded programmed instruction.

So, what is G-code? What is M-code? And how do G-code and M-code programming actually work? This article explains each one, but first let鈥檚 touch on what programming actually is.

There鈥檚 no arguing: CNC machines are incredibly accurate. Their ability to precision cut 录 the width of a human hair (0.001鈥�), makes them essential in any modern machine shop.