Computing Mean Dimensions 

This task shows you how to compute the mean dimensions of a part.
You must define the tolerances on a part before computing mean dimensions. It allows you to activate the mean dimensioning system. For more about tolerances, refer to Infrastructure User's guide Version 5.
Open the Mean_Dimensions.CATPart document.

  1. Before computing mean dimensions, apply the Edit Parameters contextual menu item to Pad.1 to display parameters, then take a look at the part you have just opened. The part includes three toleranced parameters as shown below.

    Remember that to access tolerance values, you need to double-click the parameter of interest, then use the Tolerance > Edit... contextual menu item.

  2. Click Mean Dimensions in the Tools toolbar.
    A warning message appears informing you the active dimensioning system. It also gives you an option to either convert the active dimensioning system or retain it.

  3. Click Yes to resize the 3D shape to mean dimensions.
    An additional message appears to inform you that the operation is performed and prompts you to update the part.

  4. Click OK to close the message window.

  5. Click Update All in the Tools toolbar to integrate the modifications to the part.
    Note: The update options set for your session (for more see General) do not affect the Mean Dimensions command behavior: you always have to explicitly update your part.
    Mean dimensions are displayed around the part.

  • If you want to go back to the previous state, click the Mean Dimensions icon again. The part will be resized to nominal dimensions. Original tolerance values, when re-computed, are always expressed in numerical values.

  • To ensure that you can run the command properly, do not use features having the same name.

  • If parameters are driven by formulas, the application deactivates these formulas to compute mean dimensions.