HEIDENHAIN TNC 640 User Manual

Programming Contours | Approaching and departing a contour
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HEIDENHAIN | TNC 640 | Conversational Programming User's Manual | 10/2017
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 connec-
tion
Straight line perpendicular to a
contour point
Circular arc with tangential connec-
tion
Circular arc with tangential connec-
tion to the contour. Approach and
departure to an auxiliary point outside
the contour on a tangentially connect-
ing 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.

HEIDENHAIN TNC 640 Specifications

General

Control Type	CNC
Axes	Up to 18 axes
Interfaces	Ethernet, USB, RS-232
Spindle Control	Yes
PLC	Integrated
Storage	SSD
Programming Languages	DIN/ISO
Safety Features	safety functions according to EN ISO 13849-1
Dimensions	Varies based on configuration
Weight	Varies based on configuration
Operating System	Windows