When creating an extrude, what curve rule will ensure that you select all of the sketch curves?

When creating an extrude in Siemens NX, the option that ensures all of the sketch curves are selected is the feature curves rule. This rule is designed to consider the entire boundary defined by the sketch, including all curves that make up the shape, regardless of whether they are connected or not.

Selecting feature curves allows for the inclusion of any curves within the sketch region that may not be part of a continuous path. This is particularly useful when dealing with complex sketches where some segments may not seamlessly connect due to design choices, thus ensuring that when extruding, all the intended curves are included in the operation.

In contrast, the other rules, such as connected curves or tangent curves, might restrict the selection to only certain kinds of curves that are connected in a continuous manner or follow a tangential relationship, potentially omitting important segments of the sketch needed for a complete extrusion. The region boundary curves rule focuses more on closed areas defined by sketch entities, which might not encompass all individual curves if they don’t form a complete enclosed boundary. Hence, utilizing feature curves is the most comprehensive approach to ensure that all sketch elements are incorporated into the extrusion process.