Five-Axis Nc Programs With Swivel Axes - HEIDENHAIN TNC 415 Technical Manual

1.9.2 Five-axis NC programs with swivel axes

The miscellaneous function M114 activates a function that automatically compensates tool lengths
when running five-axis NC programs, incorporating the machine geometry values from MP7510 ff.
This means that the TNC automatically compensates the offset that results from positioning swivel
axes.
The tool tip is always on the programmed nominal coordinates, so the postprocessor can disregard
the machine geometry. The tool radius must still be corrected by the CAD system or postprocessor
however.
Unlike the "Tilt working plane" function, the coordinate system does not swivel. For machines with
rotary tables therefore, remember that rotating the table also rotates the coordinate system in
relation to the machine coordinate system. This is not affected by the M114 function.
The programmed feed-rate relates to the tool tip but this is only achieved when tool length
compensation is provided by the TNC. If tool length is already compensated by the CAD system, the
programmed feed-rate will be the feed-rate of the tool datum. Finally, function M114 is deactivated
by M115 or END PGM.
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