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By creating Section Relations that refer to the Trajectory Parameter (trajpar), you can cause the dimensions of a Variable Section Sweep to vary along its Spine Curve, according to a mathematical function. A simple example is shown below: the width of the protrusion is determined by a parabolic function along the length of the feature.

You can create a datum feature that is used to measure the distance between two faces in a part. Since the datum is a feature, it updates each time the model regenerates. An Analysis datum is not displayed on the screen, and has no geometric description; however, you can select it in the Model Tree.

Add relations to the bracket shown below so that you can move the hole without causing the counterbore to break out in the curved area.

Based on the characteristic, the system allows you to specify all other required information. For example, if you are defining a position frame, the system allows you to select a feature the frame applies to and reference datums. If you are defining a form feature, such as straightness, the system allows you to specify the tolerance and the tolerance zone but does not allow you to select reference datums.

You should note that no matter what the Datum Display is set to, no datum planes, datum points, datum axes or coordinate systems display. All of these objects are on Layers that are Hidden.

Deformation Areas act as malleable areas that stretch or compress to allow undevelopable regions to extend to the outside edges of the part. Consider the model below.

The Sketch feature is used to create a curve on a 2D plane or planar surface. This curve can then be used to create a variety of different features.

Lesson Objective: In this lesson, we will learn about the basic elements of Pro/ENGINEER, including the different object types, parametric modeling and design intent.

Lesson Objective: In this lesson, we will learn how to create snapshots of our assembly at different configurations, and how to use those snapshots for drawings.

Lesson Objective: In this lesson, we will learn about the Active plane, both how to use it and how to create it, as well as some of the preferences for the grid on the plane.

Lesson Objective: In this lesson, we will learn how to create servo motors, and run a simple animation and play back the results.

Lesson Objective: In this lesson, we will learn about Datum Planes, Datum Axes, Datum Points, and Datum Coordinate Systems.

Lesson Objective: In this lesson, we will learn about trimming surfaces, meshing surfaces, displaying entities, style parameters and repeating a style command.

Lesson Objective: In this lesson, we will learn how to make multiple curve edits, copy curves, offset curves, and importing datum curves.

A variable section sweep is an advanced sweep feature that, instead of maintaining a constant section shape and size along the length of the trajectory, is varying along the trajectory by specifying additional trajectories that push or pull the section as it goes.

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