User's Manual TNC 360 (from 259 900-11) - heidenhain

4 Programming
4.3 Tool Compensation Values
4-14
Shortening or lengthening single-axis movements R+, R–
This type of radius compensation is possible only for single-axis movements
in the working plane: The programmed tool path is shortened (R-)
or lengthened (R+) by the tool radius.
Applications:
• Single-axis machining
• Occasionally for pre-positioning the tool, such as for the SLOT
MILLING cycle.
Machining corners
R+ and R– are activated by opening a positioning block with an orange axis key.
Outside corners
The TNC moves the tool in a transitional arc around
outside corners. The tool “rolls around” the corner
point.
If necessary, the feed rate F is automatically
reduced at outside corners to reduce machine
strain, for example for very sharp changes in
direction.
RL
Fig. 4.8: The tool “rolls around” outside corners
If you work without radius compensation, you can influence the machining of outside corners with M90
(see page 5-36).
Inside corners
The TNC calculates the intersection of the tool
center paths at inside corners. From this point it
then starts the next contour element. This prevents
damage to the workpiece at inside corners.
When two or more inside corners adjoin, the
chosen tool radius must be small enough to fit in
the programmed contour.
RR
S S
Fig. 4.9: Tool path for inside corners
RR
TNC 360