Important Positions For Approach And Departure - HEIDENHAIN ITNC 530 - CONVERSATIONAL PROGRAMMING User Manual

Important positions for approach and departure

Starting point P
S
You program this position in the block before the APPR block. P
outside the contour and is approached without radius compensation
(R0).
Auxiliary point P
H
Some of the paths for approach and departure go through an
auxiliary point P that the TNC calculates from your input in the
H
APPR or DEP block. The TNC moves from the current position to the
auxiliary point P at the feed rate last programmed. If you have
H
programmed FMAX (positioning at rapid traverse) in the last
positioning block before the approach function, the TNC also
approaches the auxiliary point P
First contour point P and last contour point P
A
You program the first contour point P
contour point P can be programmed with any path function. If the
E
APPR block also contains a Z axis coordinate, the TNC will first move
the tool to P in the working plane, and then move it to the entered
H
depth in the tool axis.
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 height in the tool axis.
Abbreviation Meaning
APPR Approach
DEP Departure
L Line
C Circle
T Tangential (smooth connection)
N Normal (perpendicular)
When moving from the present position to the auxiliary
point P the TNC does not check whether the
H
programmed contour will be damaged. Use the test
graphics to check.
With the APPR LT, APPR LN and APPR CT functions, the
TNC moves the tool from the present 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 before the approach block, the TNC
generates an error message.
210
at rapid traverse.
H
E
in the APPR block. The last
A
in the working
H
at the feed rate
H
lies
S
Programming: Programming Contours