HEIDENHAIN TNC 640 (34059x-05) - Manual (Page 214)

Programming: Programming contours
6.3 Approaching and departing a contour
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TNC 640 | User's Manual
HEIDENHAIN Conversational Programming | 1/2015
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 desired
path function with the corresponding soft key:
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