Fundamental Geometrical Principles
1.3 Position of coordinate systems
Fundamentals
Programming Manual, 10.2004 Edition, 6FC5 298-7AB00-0BP1
1-13
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Where the machine coordinate system is used for programming (this is possible with some
of the G functions), the physical axes of the machine are addressed directly. No allowance
is made for workpiece clamping.
Right-hand rule
The orientation of the coordinate system relative to the machine depends on the machine
type. The axis directions follow the so-called "three-finger rule" of the right hand (in
accordance with DIN 66217).
Seen from in front of the machine, the middle finger of the right hand points in the opposite
direction to the infeed of the main spindle. Therefore:
• the thumb points in the +X direction
• the index finger points in the +Y direction
• the middle finger points in the +Z direction
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