G96 – Turn on Constant Surface Speed (CSS)

This command is used to enable Constant Surface Speed (CSS) mode in lathe version.

Syntax & Parameters

• G96 followed by D & S values.
• D Value - This is to set the maximum spindle RPM that the spindle can achieve in CSS mode as the tool gets closer to the center.
• S Value - To set surface speed value. The units will be the current machine units in use.

Example program

N10 G96 D2000 S200


• In the above example CSS mode is enabled with a surface speed of 200 and the maximum RPM is set to 2000.

INFORMATION: Units are defined as either inches or mm depending on your machines setup or G20 or G21 command in use.