9 3D Touch Probes
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9.4 Digitizing with a Triggering 3D Touch Probe (Optional)
The TNC generates an NC part program from the digitized data. The
program name is entered in the scanning cycle RANGE.
During program execution, the tool radius determines the shape of the
machined contour.
When the 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
The machined part is either smaller or larger than the model. With the
SUSA evaluation software from HEIDENHAIN, you can restore the
original size if the model has been scanned in the MEANDER scanning
cycle.
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 BLK FORM 0.1 Z X+0 Y-25 Z-14.976
2 BLK FORM 0.2 X+125 Y+57.5 Z+O.254
............ Blank form definition for graphic test run
3
L Z+40 FMAX ..................................................... Starting point in Z
4 L X+0 Y-25 FMAX .............................................
Starting point in X, Y
5 L X+0 Y-l 2.561 .................................................
1 st digitized position
6
L X+2.025 Y-l 2.375 .......................................... 2nd digitized position
L X+2.005 Y-l 2.560 . . . . . . . . . . . ..____.__...................... Contour line is completely digitized: Probe has reached the
1 st digitized position
L Z+O.5 X+0 Y-l 0.423 1 st digitized position on the new contour line
L X+0 Y-l 2.560 _._______.____,___.,,.,...,...................... Last digitized position
L X+0 Y-25 FMAX .............................................
Back to starting point X, Y
L Z+40 FMAX .....................................................
Back to clearance height
END PGM DATA MM .........................................
Program end
Note:
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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.
l
Program length is limited only by the capacity of the external storage
device. After blocks 65535 the TNC begins numbering the blocks from
0 again.
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The touch probe scans the contour up to the next contour line.
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The TNC automatically marks the program beginning and end for data
transfer.
TNC 370
9-29
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