Computer numerical control brief history

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In numerical control systems, the position of the tool is defined by a set of instructions called the part program.
Positioning control is handled using either an open-loop or a closed-loop system.
In an open-loop system, communication takes place in one direction only: from the controller to the motor..

What is the history of computer numerical control?

The first CNC machine was credited to James Parsons in 1949.
Parsons was a computer pioneer who worked on an Air Force Research Project.
The research was on how to produce helicopter blades and better aircraft skin.
Parsons was able to calculate helicopter airfoil coordinates with an IBM 60.

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