The Control Point

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The control point (or controlled point) is a concept adopted from the NIST GCode Standard that defines a point of reference for machine tool movements. From the NIST GCode standard: The controlled point is the point whose position and rate of motion are controlled. In other words, when we put the machine in absolute mode and issue an absolute movement to (x=10, y=10, z=10), we are specifying that the control point move to this location in space relative to the machine's origin.