HEIDENHAIN TNC 407 (280 580) User Manual - Manual (Page 302)

9-35 TNC 425/TNC 415 B/TNC 407
9 3D Touch Probe Systems
Fig. 9.24 Digitizing a 3D contour line by line
Fig. 9.25 Paths of traverse of the touch probe in the LINE cycle
9.4 Digitizing with a Measuring Touch Probe
Z -
Line-by-line digitizing with cycle 18 LINE
The LINE cycle scans and digitizes a 3D contour in
a series of parallel lines. This process is mainly
used for digitizing with a rotary axis (see page 9-39).
In cycle 18 LINE, the touch probe moves in the
positive direction of the axis entered under DIREC-
TION. When the touch probe reaches the MAX
coordinate on this axis, it returns to CLEARANCE
HEIGHT. It then moves at rapid traverse back to the
beginning of the next line and from there in the
negative Z direction to the HEIGHT FOR FEED
RATE DECREASE. From this point it continues
moving at the probing feed rate until it contacts the
3D contour. This process repeats itself until the
entire range has been scanned.
Once the entire range is scanned, the touch probe
returns to the CLEARANCE HEIGHT.
Starting position
• Coordinates from cycle 5 RANGE or cycle 15
RANGE (TABLE):
X and Y coordinates of the MIN point
Z coordinate = CLEARANCE HEIGHT
• Automatically move to the starting position:
first in Z to CLEARANCE HEIGHT, then in X
and Y
Contour approach
The touch probe moves in the negative Z direction
toward the model. When it makes contact, the
TNC stores position coordinates.
Y
X
Z