What distinguishes absolute positioning in CNC systems?

In CNC (Computer Numerical Control) systems, absolute positioning is characterized by the fact that all positions are defined with respect to a fixed reference point, typically the origin of the workpiece coordinate system. This origin is established at the start of the machining process, and all movement commands are calculated based on this fixed point.

When using absolute positioning, a command like "move to the coordinate (2,3)" directs the machine to move to that location from the origin, irrespective of where the machine currently is. This is in contrast to relative positioning, where positions are defined based on the current position of the tool.

This distinction is crucial for programming and operating CNC machines as it helps ensure precision and consistency in machining operations. Understanding absolute positioning is fundamental for effective programming and setup of CNC equipment.