To Create a Surface from More Than Four Boundaries
1. Set the enable_obsoleted_features configuration option to yes. The Conic Surface and N-sided Patch command appears on the All Commands list.
2. Add the Conic Surface and N-sided Patch command to the desired user-defined group on the ribbon.
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For information about customizing the ribbon, see the Related Links.
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3. Click Conic Surface and N-sided Patch. The BNDRS OPTS menu opens.
4. Click > . The system opens a dialog box and lists elements of the surface feature. They are:
◦ Curves—Specifies geometrical references for this feature.
◦ Bndry Conds—(Optional) Defines Boundary Conditions.
5. Select at least five boundaries in the consecutive order for the N-sided surface. Using the One By One option in the CHAIN menu, select at least five curves or edges forming a loop. When finished, click Done from the CHAIN menu.
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The boundaries of the N-sided surface cannot include tangent edges/curves.
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6. To define Boundary Conditions, click Bndry Cond and Define in the dialog box. The BOUNDARY menu lists all surface boundaries. As you move the cursor over the boundary name, the corresponding boundary highlights in cyan.
7. Click the boundary for which you want to define Boundary Conditions. For the selected boundary, the system opens a dialog box with the Bndry Cond element selected for definition.
8. Specify the boundary condition by choosing one of the following options in the BNDRY COND menu, followed by Done:
◦ Free—No tangency conditions are set along the boundary.
◦ Tangent—The blended surface is tangent to the reference surface along the boundary.
◦ Normal—The blended surface is normal to the reference surface or datum plane.
9. For conditions other than Free, accept the defaults or select reference surfaces.
10. To complete the feature creation, click OK in the dialog box.