System Variables

System variables are predefined in GPP. Many of them represent data from the NC toolpath, such as the current X position, or the procedure name. GPP assigns values to system variables, based on the specific toolpath block being processed.

Other system variables do not represent toolpath data. Rather, they are used to control the post processor execution and behavior or to provide non-toolpath information. Examples include 5X machine definition variables.

All system variable names include one or more underscores, as in X_CURPOS or SPIN_SPPED.

The full list of system variables and the blocks in which they are assigned values is given in the "GPP2 Theory of Operation" document.