HEIDENHAIN TNC 406 - Manual (Page 103)

82 5 Programming: Tools
5.2 Electr
ode Compensation V
a
lues
Shortening or lengthening paraxial movements: R+, R–
This type of radius compensation is only possible for single-axis
movements in the working plane. The programmed electrode path is
lengthened (R–) or shortened (R+).
Applications:
„ Paraxial machining
„ Under certain circumstances for pre-positioning the electrode
Radius compensation: Machining corners
„ Outside corners
The TNC moves the electrode in a transitional arc around outside
corners. The electrode ”rolls” around the corner point. If necessary,
the feed rate F of the electrode is automatically reduced at outside
corners to reduce machine stress, for example at very great
changes of direction.
„ Inside corners
The TNC calculates the intersection of the electrode center paths at
inside corners. It then starts the next contour element from this
point. This prevents damage to the workpiece at the inside corners.
The permissible electrode radius is therefore limited by the
geometry of the programmed contour.
R+ and R– are available when a positioning block is
opened with an orange axis key.
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.
RL
S S
RL RL