HEIDENHAIN TNC 407 (280 580) User Manual User Manual
Page 299
TNC 425/TNC 415 B/TNC 407
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9
3D Touch Probe Systems
Digitizing with a Measuring Touch Probe
Input data
• TIME LIMIT
Time within which the touch probe must have orbited the model and
reached the first touch point. You can define a maximum distance
from the end point to the starting point with machine parameter MP
6390 (see page 12-5). If the entered time limit is exceeded, the TNC
interrupts the digitizing cycle.
Input range: 0 to 7200 seconds
The input value 0 means there is no time limit.
• STARTING POINT
Coordinates of the starting position in the plane perpendicular to the
probe axis.
• AXIS AND DIRECTION OF APPROACH
Coordinate axis and direction in which the probe approaches the
model.
• 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 whether
the subsequent machining operation is performed by up-cut or climb
milling.
• FEED RATE F
Enter the digitizing speed.
Input range: 1 to 3000 mm/min
The greater the digitizing speed, the less accurate the data resulting
from digitizing will be.
• MIN. LINE SPACING
If you enter an input value that is smaller than the programmed LINE
SPACING the TNC decreases the spacing between the scanned lines
to the programmed minimum for digitizing steep sections of a con-
tour. This ensures that the density of digitized positions remains
constant even if complex surface structures are scanned.
Input range: 0 to 20 mm
• LINE SPACING AND DIRECTION
The offset by which the probe moves to start a new contour line after
completing the previous one.
Input range: –20 to +20 mm
If you only want to digitize one contour line, then enter the value 0 for both MIN. LINE SPACING and LINE
SPACING
• 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 20 mm
• TOLERANCE
The TNC only stores digitized positions whose distance from a straight
line defined by the last two probe points exceeds the programmed
tolerance. This way a high density of digitized positions is output for
contours with sharply curved surfaces while as few positions as
possible are stored for contours with flat surfaces. The input value 0
means that the digitized positions are output in the programmed
probe point interval.
Input range: 0 to 0.9999 mm