What does the G71 code in CNC machining represent?

The G71 code in CNC machining is specifically used to initiate an O.D. (Outside Diameter) Roughing Cycle when programming CNC lathes. This cycle enables the machine to perform rough turning operations on cylindrical parts, focusing primarily on material removal to shape the workpiece by establishing a preliminary contour, which is essential for subsequent finishing operations.

The O.D. Roughing Cycle is designed for efficiency, allowing the CNC machine to remove large amounts of material quickly while using specified cutting parameters like feed rate and depth of cut. This contributes to improving productivity and preparing the workpiece for a finer finish in later machining stages.

Understanding the purpose of G71 is essential for CNC machinists as it directly relates to the setup and execution of machining operations that involve turning, making it a critical code within the realm of CNC programming.