Creating a Drop-off

This task shows you how to create a drop-off.
This drop-off can complete a Solid From Zones if it is incomplete or inaccurate or be used for designing purposes.
See About Drop-off for more information.
Open the DropOffSA1.CATPart document.

Creating a Drop-Off with a Slope Angle

  1. Click Drop Off  in the Preliminary Design toolbar.
    The Drop Off dialog box is displayed.
    A graphic icon within the dialog box illustrates the parameters required.

  2. Select Extrude.1 as the Reference surface.
    The dialog box is updated accordingly.

  3. Select Extract.5 as the Drop Off curve.

    The Drop-off direction is displayed in the 3D view.
    Click Reverse, or the arrow in the 3D view, if the Drop-off direction is not correct.

  4. Key in 1.5 as the Slope angle value.

  5. Click Preview:

  6. Click OK to validate and exit the dialog box.
    The drop-off is created:

Creating a Drop-Off from a Drop-Off Curve and a Bottom Curve

  1. Close DropOffSA1.CATPart without saving it and re-open it.
    Recall Intersect.5 from the NoShow.

  2. Click Drop Off in the Preliminary Design toolbar.
    The Drop Off dialog box is displayed.
    A graphic icon within the dialog box illustrates the parameters required.

  3. Select Extrude.1 as the Reference surface.
    The dialog box is updated accordingly.

  4. Select Extract.5 as the Drop-off curve.

  5. Select Intersect.5 as the Bottom curve.

    Slope and Height become inactive as they are no longer required to define the drop-off.

    Click Preview:

  6. Click OK to validate and exit the dialog box.

Creating a Drop-off from a Ply Border

  1. Open DropOffSA2.CATPart.

  2. Click Drop Off in the Preliminary Design toolbar.
    The Drop Off dialog box is displayed.
    A graphic icon within the dialog box illustrates the parameters required.

  3. Select Extrude.1 as the Reference surface.
    The dialog box is updated accordingly.

  4. Select a ply border as shown below as the drop-off curve:

  5. The Drop-off direction and the Offset direction are displayed in the 3D view.

    If they are not correct, click the arrow to reverse it, or click Reverse in the dialog box.

  6. Key in an Offset value (here 10.56) and select a bottom curve
    (or key in the Slope and Height values if the bottom curve does not exist).
    Click Preview.

  7. Click OK to validate and exit the dialog box. The drop-off is created: