Creating a Datum Feature

This task will show you how to create a datum feature.
Open the Brackets_views08.CATDrawing document.

  1. Click Datum Feature in the Dimensioning toolbar.

  2. Select the point at which you want the datum feature to be attached (attachment point).

  3. Select the point at which you want the datum feature to be anchored (anchor point).

    The Datum Feature Creation dialog box is displayed with A as default value (incremental value).

  4. Change the value, if needed.

  5. Click OK. The datum feature is created, and an extension line is automatically created on the datum feature.
  • The character string that is edited in the Datum Feature Creation dialog box is simultaneously previewed on the drawing.
  • When you create more than one datum feature, the character string of this datum feature is automatically incremented.

  • If the drawing uses an ANSI standard, you can change the Datum Feature ANSI representation to ASME representation. To do this, change the TXTDatumMode parameter of the standard file. Refer to Dimension parameters for more information.

    ASME:

    		TXTDatumMode = 1
    (Normal)

    ANSI:

    		TXTDatumMode = 2 (Flag)