HEIDENHAIN TNC 620 User Manual page 197

Radius compensation: Machining corners
Outside corners:
If you program radius compensation, the TNC moves the tool
around outside corners on a transitional arc. If necessary, the
TNC reduces the feed rate at the outside corners to reduce
machine stress, e.g. in the case of 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 at the inside corners. The permissible tool radius
is therefore limited by the geometry of the programmed contour
Danger of collision!
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.
HEIDENHAIN | TNC 620 | Conversational Programming User's Manual | 10/2015
Tool compensation
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