A sphere is the trail left by a point traveling in every conceivable direction at a
constant distance from another point called its center. A sphere is also the surface
generated by a rotating circle about a coplanar axis through its center. The sphere is
characterized by its diameter and a three dimensional center location.
The Sphere feature provides the diameter and 3D center location of the sphere. To
measure a sphere, press the < v > key for a 4 point, or the default
number of data points as established
in System Options. To override the
default, press < shift + V > and enter any number of data
points.
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figure 1, Multi-Point Data Entry |
If Auto-Direction is not enabled, Geomet will prompt
you for the characteristic of the sphere as shown in figure 2. After the data points have
been captured, Geomet will test the form error and if exceed, will prompt you to
<
Accept > or < Re-Meas >, see figure 3.
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| figure 2, Selector |
figure 3, Out-of-Form Warning |
In addition to the standard reporting of a Sphere that
consists of position and size, Geomet provides two additional tools that
provides a means to specify alternative position and size reporting. The
first tool allows a specific diameter on the sphere to be entered and
returns the height off the current PCS. The second tool provides for a
specified offset from the current PCS and report the diameter on the Sphere.
In both cases, the result is reported as a 3D Circle.
To see how these tools work, visit
Sphere Offset and Sphere Diameter.
