HEIDENHAIN TNC 360 User Manual - Manual (Page 202)

9-11 TNC 360
9 Digitizing 3D Surfaces
The TNC generates an NC part program from the digitized data. The
program name is entered in the scanning cycle RANGE.
During machine execution, the tool radius determines the shape of the
machined contour.
When tool radius equals the effective probe tip radius
The program can be run without any changes. The model that has been
scanned is reproduced.
When the tool radius does not equal the effective probe tip radius
In this case the machined part will be either smaller or larger than the
model. The HEIDENHAIN evaluation software SUSA can reproduce the
original shape of workpiece models that were scanned with the meander
scanning process.
9.5 Using Digitized Data in a Part Program
Program example with digitized data from the CONTOUR LINES cycle
0 BEGIN PGM DATA MM ..................................... Program name DATA.H is entered in the RANGE cycle
1 L Z+40 FMAX ..................................................... Starting point in Z
2 L X+0 Y–25 FMAX .............................................. Starting point in X, Y
3 L X+2.005 Y–12.561 ........................................... 1st digitized position
4 L X+2.025 Y–12.375 ........................................... 2nd digitized position
L X+2.005 Y–12.560 ........................................... Contour line completed: probe has returned to first digitized
position
L Z+0.5 X+0 Y–10.423 ........................................ 1st digitized position at the height of the new line
L X+0 Y–12.560 .................................................. Last digitized position
L X+0 Y–25 FMAX .............................................. Return to starting point in X, Y
L Z+40 FMAX ..................................................... Return to clearance height
END PGM DATA MM ......................................... Program end
Note:
• The feed rate of the touch probe system for approaching the starting
point and departing the end point is set in machine parameters for the
touch probe.
• The program length is limited only by the capacity of the external
storage device. After block 65535 the numbering begins again with 0.
• The probe scans the contour up to the next contour line.
• The TNC automatically marks the program beginning and end for data
transfer.
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9.4 Contour Line Digitizing