HEIDENHAIN TNC 620 (340 56x-03) ISO programming - Manual (Page 154)

154 Programming: Tools
5.3 T
ool Compensation
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 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
at the inside corners. The permissible tool radius, therefore, is
limited by the geometry of the programmed contour.
RL
RL RL
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.