What is the code for left cutter compensation in CNC programming?

In CNC programming, G codes are used to define specific functions and movements for the machine. The code that denotes left cutter compensation is G41. This command instructs the CNC machine to adjust the tool path to the left side of the programmed path, compensating for the radius of the cutter. This is particularly important when machining parts where the cutter’s diameter affects the final dimensions and geometry.

By using G41, the operator ensures that the tool maintains the correct offset from the programmed path, achieving the desired accuracy and finish. This feature is vital in many applications where precision is key, such as when milling parts that require tight tolerances.

The other options do not pertain to cutter compensation. For instance, M codes like M8 and M5 relate to coolant control and spindle operations, respectively. M9 is also a coolant command, turning it off. These codes serve different purposes in CNC programming, focused more on machine control rather than tool path adjustments. Thus, G41 is distinctly recognized for left cutter compensation.