Translate permits an existing PCS origin to be shifted by nominal amounts in all three
directions. Translation creates a new complete PCS whose axes are parallel to those of the
preceding PCS but shifted by the input values.
Geomet offers two methods to perform a PCS Origin Translation. The first method uses
values to translate the current origin which are entered by the operator. To use this
method, place a bullet next to the "Enter Values" entry in the Translation
Source group box, see figure 1.
To translate specific values, we will use the example shown in figure 2, PCS 1 is
shifted in two directions, XY by the nominal values of 1.375 for X and -0.75 for Y that
has been entered into the Translate Input Dialog. Upon completion, a new PCS 2 is
established.
In the next method, we can obtain a feature specific value such as the radius of the
previously measured circle. Qualifying features include Circle, Cylinder, Cone and Sphere.
When you place a bullet next to "Use Last Feature", Geomet will show the radius
value in the Translation Source box under "Use Last Feature",
see figure 1.
The ( - ) and ( + ) column will become active next to the data fields. You can then
check the appropriate directions you wish to translate in. Should you not want to
translate in any active axis, leave the check marks unchecked.
An example would be when the origin is called out on a tangent point of a circle. After
you have established the Orient and Align Axis, measure the circle and place the origin in
the center. Then perform a PCS Translate using the last feature option. Select the
appropriate direction under the ( - ) and ( + ) columns. After accepting the translation,
the new origin will be on the tangent point of the circle.
Both methods will create a new PCS. To summarize the methods, when "Enter
Values" is selected, the values entered by the operator are considered absolute and
will carry forward with each successive inspection run. Selecting "Use Last
Feature" the translation values will recalculate with each inspection run and are
considered dynamic to the current inspection run.
See Also: Edit an Existing Translation Feature
