G97 S100 is a command for what?

The command G97 S100 is used in CNC programming to set the spindle speed of a milling machine in revolutions per minute (RPM). In this command, G97 specifies that the units are RPM rather than other measures of spindle speed, while S100 indicates that the spindle should operate at a speed of 100 RPM.

This command is crucial for controlling the cutting process as it determines how fast the tool will rotate during machining operations, affecting factors like surface finish, tool wear, and overall machining efficiency. Properly understanding G97 and how it relates to spindle speed allows operators to optimize their machining parameters for better quality and productivity.