About the Extend Feature
To activate the Extend tool, you must first select the boundary edge chain to be extended and then click
Model >
Extend.
You can extend a quilt by a specified distance or up to a plane. Specify the desired method by selecting from the Extend tab:
• ![](../../../part_modeling/part_modeling/images/extend_along_surface.png)
Along Surface—Extends the surface boundary edge chain along the original surface.
• ![](../../../part_modeling/part_modeling/images/extend_to_plane.png)
To Plane—Extends the boundary edge chain up to a specified plane in the direction normal to this plane.
When
![](../../../part_modeling/part_modeling/images/extend_along_surface.png)
Along Surface is used to create an Extend feature, choose one of the following options to determine how the extension is done:
• Same—(Default) Creates the extension of the same type as the original surface (for example, plane, cylinder, cone, or spline surface). The original surface is extended past its selected boundary edge chain.
• Tangent—Creates the extension as a ruled surface that is tangent to the original surface.
• Approximate—Creates the extension as a boundary blend between the boundary edges of the original surface and the edges of the extension. This method is useful when extending the surface up to a vertex that does not lie along a straight edge.
When extending quilts, consider the following information:
• You can indicate whether you want to measure the extension distance along the extended surface or along a selected datum plane.
• You can add measurement points to the selected edge so you can vary the extension distance at different points along the boundary edge.
• You can enter a positive or negative value for extension distance. If the configuration option show_dim_sign is set to no, entering a negative value flips the extension direction. Otherwise, entering a negative value sets the extension direction pointing to the inner side of the boundary edge chain.
• Entering a negative value causes a surface to be trimmed.