A method of automatically operating a manufacturing machine based on a code of letters, numbers, and special characters
NC machine programming
1. Written instructions converted into a corresponding hole pattern on tape
2. Tape reader reads hole pattern and converts to electrical signal code
3. Controller receives electrical signal code and causes NC machine to respond
4. NC machine executes required motions to manufacture a part
NC machine tools
One or more of the following functions may be automatic: starting/stopping spindle, controlling spindle speed, positioning/guiding tool tip, controlling feed rate, changing tools
Functions of a machine tool
Hold work piece and cutting tool securely
Provide sufficient power to enable tool to cut work piece material at economical rates
Displace tool and work piece relative to one another to produce required work piece shape with desired accuracy and surface finish
Computer Numerical Control (CNC)
Characterized by availability of dedicated computer and enhanced memory in controller, providing additional capabilities over traditional NC
Additional capabilities of CNC over traditional NC
Part program storage memory
Part program editing
Part program downloading and uploading
Part program simulation using tool path
Tool offset data and tool life management
Additional part programming facilities
Macros and subroutines
Background tape preparation
The controls with the machine tools these days are all CNC and the old NC control do not exist anymore
