How to extrude a circular surface with holes arrayed around an inner circle without excluding the inside surface in Inventor?

Autodesk Support

Oct 8, 2023

Products and versions covered

Issue:

When creating and extruding a sketch with two concentric circles, where the inner one represents the array line for holes, the inner surface is excluded from the extrusion (see pictures bellow).
How can the inner circle be eliminated from the profile selection, so that the surface is created after the outer circle and just the lines that describe the holes?

Sketch Example

Create Pattern

Create Sketch Pattern

Finished Pattern

Extrusion Example

Create Extrusion

Create Extrusion

The inner surface is excluded

Causes:

The sketch for the inner circle was created using "Normal" geometry which is considered for the profile extrusion.

Solution:

To solve this issue, the circle will need to be turned into Construction Geometry before exiting the sketch.
To do that:

Select the dimension line, right click on it and go to "Select Other";

Pre-select the circular dimension

Select "Curve", as this is the sketch geometry;

Select from drop down menu

Select the Construction geometry;

Select Construction Geometry icon

The Extrusion will no longer pick up the array circle as geometry for the profile.

Extrusion

Products:

Inventor; Inventor Factory; Inventor Professional; Inventor Series;

Versions:

2017; 2016; 2019; 2018;

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