This parameter can increase the machining speed if the Enable High Speed Machining box on the Cut Control tab is checked. Enter a value greater than 0 to increase the machining speed.
The tool speed decreases when a tool must go from a rapid vertical move to a rapid horizontal move. If you enter a positive value for High Feedrate, the horizontal and vertical rapid moves are changed to multiple linear moves.
The High Feedrate parameter is the speed that is used for these linear moves.
The value you enter for High Feedrate is normally the maximum speed of the machine.