Which mode switch operates alongside an M01 in the CNC program?

The mode switch that operates alongside an M01 in a CNC program is the Optional Stop.

M01 is used to signal an optional stop in a CNC program. When M01 is included in the program, the machine will stop when it reaches that point, but only if the operator has activated the Optional Stop switch. This allows the operator to pause the machining process for various reasons, such as checking the workpiece or changing tools, without requiring the program to stop completely every time a halt is needed.

When the Optional Stop feature is enabled, it gives the operator control over whether or not to stop at these designated points in the program. If the switch is off, the CNC machine will continue running through the M01 command without stopping. Thus, the correct pairing of the M01 command with the Optional Stop mode switch provides flexibility in managing the machining operation.

The other options, such as End of Program, Line N10, and Line N35, do not directly correlate with the function of M01 as they pertain to different aspects of the CNC programming and operation.