Part Modeling > Edit Features > Extend > About the Extend Feature
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:
Along Surface—Extends the surface boundary edge chain along the original surface.
To Plane—Extends the boundary edge chain up to a specified plane in the direction normal to this plane.
When 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.