HEIDENHAIN TNC 320 User Manual page 216

Selecting a program with contour definitions
With the SEL CONTOUR function you select a program with contour
definitions, from which the TNC takes the contour descriptions:
U Show the soft-key row with special functions.
U
Select the menu for functions for contour and point
machining.
U Press the SEL CONTOUR soft key.
U Enter the full name of the program with the contour
definition and confirm with the END key.
Program a SEL CONTOUR block before the SL cycles. Cycle
14 CONTOUR GEOMETRY is no longer necessary if you use SEL
CONTOUR.
Defining contour descriptions
With the DECLARE CONTOUR function you enter in a program the path for
programs from which the TNC draws the contour descriptions. In
addition, you can select a separate depth for this contour description
(FCL 2 function):
U Show the soft-key row with special functions.
U Select the menu for functions for contour and point
machining.
U Press the DECLARE CONTOUR soft key.
U Enter the number for the contour designator QC, and
confirm with the ENT key.
U Enter the full name of the program with the contour
description and confirm with the END key, or if
desired,
U Define a separate depth for the selected contour.
With the entered contour designators QC you can include
the various contours in the contour formula.
If you program separate depths for contours, then you
must assign a depth to all subcontours (assign the depth 0
if necessary).
216 Fixed Cycles: Contour Pocket with Contour Formula