Computer numerical control machine tools are such type of machine tools that have revolutionized machining processes. It is nothing but using a computer as a mean to control a machine that produces useful objects from solid blocks of material. CNC machine works under a close loop system,that means when an operation is performed by executing a program,a feedback is coming back to the CNC system. This is not a descriptive answer of what is CNC machine.
If we starts with a material block in a CNC machine after a certain time machine gives us a finished product like a spur gear,rifle barrel etc. Thus we can see that CNC machine performs various jobs in a single machine tool.
Lets find the CNC machine definition, CNC system and CNC technology in a descriptive manner.