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Selectthe equipment to constrain.
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Select Constraints on the Place Equipment Controls.
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Select Mate to Tangent Plane from the Add Constraint list.
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Select a surface on the equipment. Use QuickPick if needed.
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Define the first end of the intersection point vector.
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Define the second end of the intersection point vector.
The equipment moves to satisfy the constraint.
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In the Offset box, type the distance, if any, to offset the surfaces.
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Complete the placement:
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Select Finish (CTRL + ENTER) to save your changes and exit the command.
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Select Finish and Modify (CTRL + SHIFT + ENTER) to save your changes and then start the modification of that object.
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Understanding the Mate to Tangent Constraint
Using the mate to tangent plane relationship, you can create a tangent plane at the intersection of a user-defined vector and a selected surface. You establish the relationship by first selecting a reference on an equipment object and then selecting two points in the model to define a vector and identify a surface (in the model). The vector is used to locate an intersection point in the model. A plane tangent to the surface (at the intersection point) is created and used as the mating surface.
Both the vector and the surface are associative inputs; if you modify the referenced surface, Smart 3Dx recomputes the point and the tangent plane.