HEIDENHAIN TNC 640 (34059x-01) - Manual (Page 175)

HEIDENHAIN TNC 640 175
5.3 T
ool Compensation
Contouring with radius compensation: RR and RL
The tool center moves along the contour at a distance equal to the
radius. "Right" or "left" are to be understood as based on the direction
of tool movement along the workpiece contour. See figures.
Entering radius compensation
Radius compensation is entered in an L block. Enter the coordinates
of the target point and confirm your entry with ENT
Select tool movement to the left of the contour: Press
the RL soft key, or
Select tool movement to the right of the contour:
Press the RR soft key, or
Select tool movement without radius compensation
or cancel radius compensation: Press the ENT key
Terminate the block: Press the END key
X
Y
RL
X
Y
RR
RR The tool moves to the right of the programmed contour
RL The tool moves to the left of the programmed contour
Between two program blocks with different radius
compensations RR and RL you must program at least one
traversing block in the working plane without radius
compensation (that is, with R0).
The TNC does not put radius compensation into effect
until the end of the block in which it is first programmed.
In the first block in which radius compensation is activated
with RR/RL or canceled with R0 the TNC always positions
the tool perpendicular to the programmed starting or end
position. Position the tool at a sufficient distance from the
first or last contour point to prevent the possibility of
damaging the contour.
RADIUS COMP.: RL/RR/NO COMP.?