City for CNC

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This text appears to be a Wikipedia article about Computer Numerical Control (CNC) machining. It provides an overview of the technology, its history, and its applications in various industries. The article mentions that a CNC program is a set of instructions that tells a machine how to perform a specific task, such as cutting or drilling metal. The program consists of a series of G-codes, which are standardized commands used in CNC machining. Here's a breakdown of the G-code in the example: * `G02 X1.75 Y-1.25 I0.0 J0.0`: This line tells the machine to move to a specific position (X1.75, Y-1.25) and perform a CW arc cut with a radius origin at (I0.0, J0.0). * `G02 X0.75 Y-1.5625 I0.0 J0.0`: This line tells the machine to move to another position (X0.75, Y-1.5625) and perform another CW arc cut with the same radius origin as the previous one. * `G00 Z0.5`: This line tells the machine to rapidly traverse to a height of 0.5 units above the work surface. * `M05`: This line tells the machine spindle to stop spinning. * `G00 X0.0 Y0.0`: This line tells the machine to return to its home position (X=0, Y=0). * `M30`: This line marks the end of the program. The article also mentions that having the correct speeds and feeds in the program is crucial for efficient and smooth product runs. Incorrect speeds and feeds can cause damage to the tool, machine spindle, or even the product itself. The article suggests using a calculator or consulting Machinery's Handbook to determine the proper speeds and feeds for a material. The article also provides references to other sources, including books and articles on CNC machining, automation, and manufacturing. Overall, this text appears to be a comprehensive overview of CNC machining technology, its history, and its applications.