36 1 Operation
1.3 Preparing to Measure
Construct a datum point from line features
Construct a point from the skew line and the left edge line to create a
datum.
U Press the POINT key. The Probe Point screen will be
displayed.
U Press UP ARROW/ENTER to start the construction
and select the line feature (2). The screen will change
to the Construct Point screen, feature 2 will be
checked and skew line feature 1 will become
highlighted.
U Press ENTER to check feature 1.
U Press the FINISH key to complete the point
construction from the intersection of the two
checked parent line features.
Zeroing the datum
Datums can be zeroed or preset. This example creates a zero
reference datum from a point feature.
U With the datum point highlighted in the feature list,
press the DATUM key if necessary to select the
desired datum in the upper right corner of the screen.
U Press the X and Y AXIS keys to zero the point position.
POINT key is pressed Features are selected Point is constructed
Point is highlighted Point is zeroed as datum
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