HEIDENHAIN TNC 410 - Manual (Page 277)

13 Digitizing 264
Digitizing parameters
ú Time limit: Time within which the touch probe must orbit the model
and reach the first touch point. If the entered time limit is exceeded,
the TNC interrupts the digitizing process. Input range: 0 to 7200
seconds. The input value 0 means there is no time limit.
ú Starting point: Coordinates of the starting position in the working
plane.
ú Axis and direction of approach: Coordinate axis and direction in
which the touch probe approaches the model.
ú Starting probe axis and direction: Coordinate axis and direction in
which the probe begins scanning the model. Defining the
direction at the same time determines the whether the subse-
quent machining operation is performed by up-cut or climb
milling.
ú Limit in normal lines direction: Distance by which the touch probe
lifts of the model after each deflection of the stylus during
scanning. Input range: 0 to 5 mm. Recommended input value:
Enter an input value between 50% and 100% of the probe point
interval. The smaller the ball-tip radius, the larger the Limit in
Normal lines direction should be programmed.
ú Line spacing and direction: The offset by which the touch probe
moves to start a new contour line after completing the previous
one. The algebraic sign determines the direction in which the
probe is offset. Input range: –5 to +5 mm
If you only want to digitize a single contour line, enter
zero for the line spacing.
ú Max. probe point interval: maximum spacing between
consecutive digitized positions. The TNC also accounts for
important points that define the contour of the model, for
example at inside corners. Input range: 0.02 to 5 mm
Example NC blocks
60 TCH PROBE 7.0 CONTOUR LINES
61 TCH PROBE 7.1 TIME: 0 X+0 Y+0
62 TCH PROBE 7.2 ORDER: Y– / X–
63 TCH PROBE 7.2 TRAVEL: 0.5 L.SPAC+: +0.2
PP.INT: 0.5
13.4 Contour Line Digitizing