Programming contours
6.3
Approaching and departing a contour
6
244
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.
Summary of Contents for TNC 620 Programming Station
Page 4: ......
Page 5: ...Fundamentals ...
Page 28: ...Contents 28 HEIDENHAIN TNC 620 ISO Programming User s Manual 9 2016 ...
Page 57: ...1 First Steps with the TNC 620 ...
Page 77: ...2 Introduction ...
Page 110: ......
Page 111: ...3 Fundamentals file management ...
Page 166: ......
Page 167: ...4 Programming aids ...
Page 194: ......
Page 195: ...5 Tools ...
Page 234: ......
Page 235: ...6 Programming contours ...
Page 284: ......
Page 285: ...7 Data transfer from CAD files ...
Page 304: ......
Page 305: ...8 Subprograms and program section repeats ...
Page 323: ...9 Programming Q parameters ...
Page 384: ......
Page 385: ...10 Miscellaneous functions ...
Page 407: ...11 Special functions ...
Page 433: ...12 Multiple axis machining ...
Page 475: ...13 Pallet management ...
Page 480: ......
Page 481: ...14 Manual Operation and Setup ...
Page 549: ...15 Positioning with Manual Data Input ...
Page 554: ......
Page 555: ...16 Test Run and Program Run ...
Page 590: ......
Page 591: ...17 MOD Functions ...
Page 622: ......
Page 623: ...18 Tables and Overviews ...