HEIDENHAIN TNC 426 (280 476) - Manual (Page 139)

112 5 Programming: Tools
5.3 T
ool Compensation
Tool movements 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
at right.
Entering radius compensation
Program any desired path function, enter the coordinates of the target
point and confirm your entry with ENT.
To select tool movement to the left of the contour,
press the RL soft key, or
To select tool movement to the right of the contour,
press the RR soft key, or
To select tool movement without radius
compensation or to cancel radius compensation,
press the ENT key.
To terminate the block, press the END key.
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).
Radius compensation does not take effect until the end of
the block in which it is first programmed.
You can also activate the radius compensation for
secondary axes in the working plane. Program the
secondary axes too in each following block, since
otherwise the TNC will execute the radius compensation
in the principal axis again.
Whenever radius compensation is activated with RR/RL or
canceled with R0, the TNC 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. ?
X
Y
RL
X
Y
RR