Which command would you use to turn off a spindle's rotation?

The command used to turn off a spindle's rotation is M05. In CNC programming, M-codes are used to control various machine functions, and each code has a specific purpose. M05 is designated explicitly to stop the spindle from rotating, ensuring that the cutting tool is not spinning while further operations or tool changes are performed, which is essential for safety and precision.

The other commands serve different functions: M02 is used to end the program, M03 is for starting the spindle in a clockwise direction, and M08 is used to turn on coolant. Understanding the specific role of each M-code allows for effective and safe operation of CNC machinery.