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ISO 841:2001 Industrial automation systems and integration - Numerical control of machines - Coordinate system and motion nomenclature
standard by International Organization for Standardization, 10/01/2001
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Full Description
This International Standard describes a machine coordinate system related to the primary motions of individual numerically controlled machines and the associated machine motions.
The machine coordinate system is used to provide the coordinates of a moving tool (or a point in the working space or on the drawing) with respect to a stationary workpiece. Thus a programmer can describe the machine operations without having to know whether the tool approaches the workpiece or the workpiece approaches the tool.