 STEP GD&T information can also be added to enable quality measurement on the control, and CAM-independent volume removal features may be added to facilitate regeneration and modification of the toolpaths before or during machining for closed loop manufacturing.Input to a CNC in the ISO 6983/RS274D G-code control language is often machine-specific and limited to axis motion commands.The machine tool is given little or no information about the desired result of the machining.