Siemens SINUMERIK 840Di sl Programming Manual page 32

Fundamental Geometrical Principles
1.3 Position of coordinate systems
Mirroring of the Z axis
Shifting and turning the workpiece coordinate system
One way of machining inclined contours is to use appropriate fixtures to align the workpiece
parallel to the machine axes.
... Another way is to generate a coordinate system, which is oriented to the workpiece. The
coordinate system can be moved and/or rotated with programmable frames.
This enables you to
• move the zero point to any position on the workpiece
• align the coordinate axes parallel to the desired working plane by rotation
• and thus machine surfaces clamped in inclined positions, produce drill holes at different
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angles.
Programming Manual, 11/2006, 6FC5398-1BP10-2BA0
Fundamentals