What does the M01 code indicate in CNC programming?

In CNC programming, the M01 code is referred to as an "optional stop." This command instructs the CNC machine to halt operation at that point in the program only if the optional stop feature is activated on the machine panel. This means that the operator has the choice to stop the machine for inspection, part removal, or tool changes without altering the rest of the program. If the optional stop feature is not enabled, the machine will continue executing the program without stopping, allowing for uninterrupted operation.

This capability is particularly useful in scenarios where operators may need to intermittently assess the workpiece or make adjustments without the necessity of stopping the entire program. By using M01, programmers provide flexibility in the machining process without affecting the overall workflow when stops aren't required.

Understanding this code is crucial for effective CNC programming, as it highlights how machinery can be operated under varying conditions based on operator needs while still maintaining efficiency.