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Radius compensation: Machining corners
Outside corners
If you program radius compensation, the TNC moves the tool
around outside corners either on a transitional arc or on a spline
(selectable via MP7680). If necessary, the TNC reduces the feed rate
at outside corners to reduce machine stress, for example at very
great changes of direction.
Inside corners
The TNC calculates the intersection of the tool center paths at
inside corners under radius compensation. From this point it then
starts the next contour element. This prevents damage to the
workpiece. The permissible tool radius, therefore, is limited by the
geometry of the programmed contour.
To prevent the tool from damaging the contour, be
careful not to program the starting or end position for
machining inside corners at a corner of the contour.
Machining corners without radius compensation
If you program the tool movement without radius compensation,
you can change the tool path and feed rate at workpiece corners
with the miscellaneous function M90 (see section 7 .4
+Miscellaneous Functions for Contouring Behavior+).
HEIDENHAIN TNC 426 B, TNC 430
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