HEIDENHAIN TNC 620 Programming Station, Руководство пользователя

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Programming contours
6.3 Approaching and departing a contour
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HEIDENHAIN | TNC 620 | ISO Programming User's Manual | 9/2016
Example NC blocks
N50 G00 G40 G90 X-30 Y+50*
Starting point
N60 G01 G41 X+0 Y+50 F350*
First contour point
N70 G26 R5*
Tangential approach with radius R = 5 mm
. . .
PROGRAM CONTOUR BLOCKS
. . .
Last contour point
N210 G27 R5*
Tangential departure with radius R = 5 mm
N220 G00 G40 X-30 Y+50*
End point
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.