CNC vs NC machine
NC Machine (Numerical Control Machine)
NC stands for numerical Control. A machine tool is operated by a series of coded instructions that include numbers, letters of the alphabet, and symbols that the machine control unit (MCU) can read. These coded instructions are changed into electrical pulses that the machine’s motors and controls follow to run manufacturing functions on a workpiece.
Numerical control (NC) points to the method of controlling the manufacturing operations by numerical instructions in the form of directly inserted coded in machine tools.
CNC Machine (Computer Numerical Control Machine)
CNC stands for computer numerical control. It is a machine controlled by a computer. Its outer appearance is related to that of an NC machine. Tape or Computer Keyboard or Tutor Keyboard is utilised as input media for CNC machines. For NC machines tape is to be fit repeat to design repeated jobs or products.
In a CNC machine, all the numerical functions are managed by the computer. The computer stores the programs which are required to operate the machine.
Difference between CNC vs NC machine
| NC machine | CNC machine |
| The programs are fed into the punch cards | The programs are fed directly into the computer by a small keyboard similar to our traditional keyboard |
| The modification in the program is difficult | The modification in the program is very easy |
| Required for a highly skilled operator | A less skilled operator can also operate the machine |
| The cost is less | The cost is very high |
| Maintenance cost is less. | Maintenance cost is high. |
| Programs cannot be stored in the NC machine | Programs can be stored in computers and used repeatedly. |
| Offers less flexibility and computational capability | Offers additional flexibility and computational capability |
| Low accuracy | High accuracy |
| It requires more time for the execution of the job | It takes very less time in the execution of the job |
| Not possible to run it continuously. | Can be continued for 24 hours of a day. |
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