What is the command for turning off the spindle in CNC programming?

The command for turning off the spindle in CNC programming is M5. This command is used specifically to stop the rotation of the spindle in a CNC machine. When programming a CNC mill, issuing M5 will halt any spindle activities, which is essential for safely changing tools or workpieces, or when the machining operation is complete.

Understanding the function of M5 is crucial for operators to ensure the safe operation of the milling machine. It is a standard G-code command used across various CNC systems, making it widely applicable in different machining scenarios.

The other commands serve different purposes; for instance, M9 is typically used to turn off the coolant, G83 is a drilling cycle command that indicates a peck drilling behavior, and G54 refers to a work coordinate system setting, which defines the origin point for machining on the workpiece. Knowing the specific functionalities of these commands helps operators effectively control CNC machining processes.