Both numerical control (NC) and computer numerical control (CNC) machines help in achieving a high accuracy product in less time. Let’s unfold some major differences between numerical control (NC) and computer numerical control (CNC) machines.
What is Numerical Control (NC)?
It is the automated control of machining tools using a computer. Numerical control is depicted as a machine that is controlled by a set of instructions (program) in the form of numbers, letters and symbols.
What is Computer Numerical Control (CNC)?
A CNC machine operates a portion of the material to meet specifications by adhering to the guided set of instructions (program) and without a manual administrator controlling the machining activity.
Difference between Numerical Control (NC) and Computer Numerical Control (CNC)
| S.No | NC | CNC |
|---|---|---|
| 1. | The full form of NC is Numerical Control | The full form of CNC is Computer Numerical Control. |
| 2. | In NC, we use punch tapes and punch cards as input. | In CNC, we prefer keyboards as input. |
| 3. | In NC it is hard to make changes in the program. | In CNC, it is easy to make modifications in the program. |
| 4. | Memory is not present to store the instructions. | Memory is present to store instructions. |
| 5. | It is less expensive as compared to the CNC machine. | It is more expensive as compared to the NC machine. |
| 6. | In NC, we don’t have to fret about maintenance cost as it is very less. | Here, the maintenance amount is high. |
| 7. | It is less flexible. | It is more flexible as compared to the NC. |
| 8. | It is average in terms of accuracy. | It is good in terms of accuracy. |
| 9. | It is more time consuming. | It is less time consuming. |
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