Tips & Tricks: Stand-Alone Datum Feature Symbols in Creo 4.0

Written By: Aaron Shaw
  • 3/10/2017

In Creo 4.0, we introduced a number of features to make using model-based definition more seamless. Among the changes: datum feature symbols can now be used as stand-alone annotations. You can even assign parameters, control characteristics, and more. Here’s how it works.

Create a Stand-Alone Datum Feature Symbol

To create a stand-along symbol, follow these steps:

  1. Click Annotate > Datum Feature Symbol.
  2. In the graphics area, select a reference, such as a surface, edge, or diameter.
  3. Drag the pointer to change the length of the symbol’s leader.
  4. Middle-click to place the symbol.

The symbol is added to the annotations group at the top of the model tree.

Creating new symbol

A newly created symbol shown in the model tree and the graphics area.

Assign Parameters to a Datum Feature Symbol

Symbols can have parameters, which help provide additional information about an object. To add a parameter, follow these steps:

  1. In the graphics area, right-click the symbol.
  2. Select Parameters. The Parameters dialog opens.
  3. Add, remove, or edit parameters.

Use a Datum Feature Symbol as a Control Characteristic

Symbols can be designated as a control characteristic to help in planning downstream manufacturing processes. To designate a control characteristic, follow these steps:

  1. In the graphics area, select the symbol.
  2. In the ribbon, click Options.
  3. Select Designate > Control Characteristics.

Semantic References

Symbols can have multiple semantic references. Just follow these steps:

  1. In the graphics area, select the symbol.
  2. In the ribbon, click References.
  3. In the graphics area, select the reference geometry.

Semantic reference

Adding a semantic reference to a symbol.

View Notifications

If a problem arises, the Notification Center will pop up in the lower right corner of the graphics area. Just click Open Notification Center to view a detailed list of issues.

Find Missing References

You can find missing references in the References dialog. Here’s how:

  1. In the graphics area, select the symbol.
  2. In the ribbon, click References.
  3. Browse the References dialog to find missing references, which the system indicates with a yellow dot icon and highlights in red in the graphics area when they are selected.

Missing reference

A missing reference is found in the References dialog.

Watch the Demo

You can see a brief demo of these tips in the video below.

To learn more, read the PTC Creo Help Center page, Datum Feature Symbols as Standalone Annotations in Model-Based Definition. 

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About the Author

Aaron Shaw

Aaron Shaw joined PTC in 2013, currently he is the Senior Manager, CAD Demand Generation. He is responsible for the CAD marketing strategy and execution worldwide. He enjoys playing golf, eating spicy foods, reading, traveling, and rooting for all Boston teams. Aaron is a graduate of Penn State, you can follow him on Twitter @AaronEShaw.