HEIDENHAIN TNC 620 Programming Station

Programming contours | Approaching and departing a contour
5
Overview: Types of paths for contour approach and
departure
The functions for contour approach APPR and departure DEP are
activated with the APPR/DEP key. You can then select the following
path forms with the corresponding soft keys:
Approach Departure Function
Straight line with tangential
connection
Straight line perpendicular to a
contour point
Circular arc with tangential
connection
Circular arc with tangential
connection to the contour.
Approach and departure to an
auxiliary point outside the contour
on a tangentially connecting line
Approaching and departing a helix
The tool approaches and departs a helix on its extension by moving
in a circular arc that connects tangentially to the contour. You
program helical approach and departure with the APPR CT and DEP
CT functions.
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HEIDENHAIN | TNC620 | Klartext Programming User's Manual | 01/2022