HEIDENHAIN TNC 360 User Manual - Manual (Page 196)

9-5 TNC 360
9 Digitizing 3D Surfaces
Fig. 9.2: Scanning a line on the 3D surface
9.3 Line-By-Line Digitizing
The MEANDER cycle scans and digitizes a 3D
contour in a back-and-forth (“meandering”) series
of parallel lines.
Starting position
• Coordinates from the RANGE cycle:
X and Y coordinates of the MIN point
Z coordinate = CLEARANCE HEIGHT
• Automatically move to the starting position:
first Z, then X and Y
Contour approach
The touch probe moves in the negative Z direction towards the model.
Upon contact, the TNC stores the position.
Input data
• LINE DIRECTION
Coordinate axis in whose positive direction the touch probe moves
(beginning with the first contour point).
• LIMIT IN NORMAL LINES DIRECTION
Distance the probe is retracted from the model after each deflection of
the stylus during scanning
• LINE SPACING
The offset by which the probe moves at the ends of the lines before
scanning the next line
• MAX. PROBE POINT INTERVAL
Maximum spacing between consecutive digitized positions
The LINE SPACING and MAX. PROBE POINT INTERVAL cannot exceed 5 mm.
Y
X
Z