HEIDENHAIN ITNC 530 User Manual page 206

End point P
N
The position P lies outside of the contour and results from your
N
input in the DEP block. If the DEP block also contains a Z axis
coordinate, the TNC will first move the tool to P
plane, and then move it to the entered depth in the tool axis.
Abbreviation Meaning
APPR Approach
DEP Departure
L Line
C Circle
T Tangential (smooth connection)
N Normal (perpendicular)
The TNC does not check whether the programmed
contour will be damaged when moving from the actual
position to the auxiliary point P
simulate approach and departure before executing the
part program.
With the APPR LT, APPR LN and APPR CT functions, the
TNC moves the tool from the actual position to the
auxiliary point P at the feed rate that was last
H
programmed. With the APPR LCT function, the TNC
moves to the auxiliary point P
programmed with the APPR block. If no feed rate is
programmed yet before the approach block, the TNC
generates an error message.
Polar coordinates
You can also program the contour points for the following approach/
departure functions over polar coordinates:
APPR LT becomes APPR PLT
APPR LN becomes APPR PLN
APPR CT becomes APPR PCT
APPR LCT becomes APPR PLCT
DEP LCT becomes DEP PLCT
Select by soft key an approach or departure function, then press the
orange P key.
206
in the working
H
. Use the test graphics to
H
at the feed rate
H
6 Programming: Programming Contours