05.91 3 Directions of Movement, Dimensioning
3.1 Coordinate system
3 Directions of Movement, Dimensioning
3.1 Coordinate system
The directions of movement of a machine tool are based on a coordinate system allocated to
the axes of motion of the machine.
The coordinate system used is clockwise and rectangular, and has X, Y and Z axes. The
system is based on the main axes of the machine.
The coordinate system is defined as follows:
• The second axis is perpendicular to the first axis.
• If the first axis rotates via the shortest path (90°) towards the second axis, a right-hand
threaded screw connected to it will move towards the third axis.
Clockwise coordinate system
Z (3rd axis)
X (1st axis)
Y (2nd axis)
90°
The program is the same irrespective of whether the workpiece or the tool is moved during
machining.
Default allocations for turning machines: Main axes X and Z
Default allocations for milling machines: Main axes X, Y and Z
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Axis addresses are freely selectable
via the machine data.
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© Siemens AG 1991 All Rights Reserved 6ZB5 410-0HD02 3–1
SINUMERIK 880, (PG)
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