3D constraints are defined with
one of the two constraint commands available in this app.
Depending on the creation mode chosen for creating wireframe geometry and
surfaces (see Wireframe and Surface User's Guide), constraints set on these elements may react in two ways.
You create references if support elements were created with the
Datum mode deactivated. Conversely, you create constraints if
you constrain datum features.
You can set a distance constraint between a face and a plane, then a
reference between the face and another plane.
Before you begin:
To perform this task, create a pad and two planes parallel to one of its face.
Select the face you wish to constrain and a plane for example. In our example,
the plane is a datum feature (there are no links to the other entities that were
used to create that plane).
From the Transform section of the action bar, click
Constraint
. The app detects the distance value between the face
and the plane. Moving the cursor moves the graphic symbol representing the
distance.
Click where you wish to position the constraint value.
The constraint is created.
Now, set another constraint between the same face and
Plane.2.Plane.2is not
a datum. Repeat the instructions described above
using the face and Plane.2.
The app creates a reference.
Creating a reference means that each time the app integrates
modifications to the geometry, this reference reflects the changes too.
The reference is displayed in parentheses
as shown below:
Note: You cannot set a distance constraint between two faces belonging to Part Design features linked by their
specifications. In the example below, the app creates a reference between the faces,
not a driving constraint.