What type of command is G4 in CNC programming?

The G4 command in CNC programming is recognized as a dwell command, which means it instructs the CNC machine to pause for a specified amount of time. This pause can be essential during machining processes for purposes such as allowing the machine to cool down, letting a tool settle into place before further operations, or ensuring that a particular operation needs a moment of inactivity for accuracy.

Using the dwell command can add precision to the machining process when necessary, ensuring that parts are produced with the desired specifications and characteristics. This is distinct from rapid positioning, linear interpolation, and miscellaneous commands, which serve different functions in CNC programming. Rapid positioning moves the tool quickly to a designated location without engaging in the machining process, linear interpolation entails moving the tool along a straight line at a programmed speed while cutting, and miscellaneous commands typically handle various machine-specific functions that do not fit into the other categories.