Siemens SINUMERIK 840D sl Function Manual page 812

Detailed description
2.1 Axes
Application
In the case of helical interpolation FGROUP can be programmed to determine whether:
• The programmed feedrate should be valid on the path
• The programmed feedrate should be valid on the circuit
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(all 3 programmed axes are path axes)
(2 axes are path axes and the infeed axis is a synchronous axis)
Basic logic functions: Axes, coordinate systems, frames (K2)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0