Fundamental Geometrical Principles; Workpiece Positions; Workpiece Coordinate Systems; Cartesian Coordinates - Siemens Sinumerik 840D sl Programming Manual

Fundamental Geometrical Principles

2.1

Workpiece positions

2.1.1

Workpiece coordinate systems

In order that the machine or the control can work with the positions specified in the NC program,
these position specifications have to be made in a reference system that can be transferred
to the directions of motion of the machine axes. Cartesian (i.e. clockwise, perpendicular)
coordinate systems in accordance with DIN 66217 are used as workpiece coordinate system
for machine tools.
The workpiece zero (W) is the origin of the workpiece coordinate system.
2.1.2

Cartesian coordinates

The axes in the coordinate system are assigned dimensions. In this way, it is possible to clearly
describe every point in the coordinate system and therefore every workpiece position through
the direction (X, Y and Z) and three numerical values. The workpiece zero always has the
coordinates X0, Y0, and Z0.
Fundamentals
Programming Manual, 01/2015, 6FC5398-1BP40-5BA2
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