What am I missing?

[JDMather]

I was looking at this thread and thinking surely it must be easier.

I reduced the problem down to a base STEP file and easily solved the problem in SolidWorks and Inventor, but couldn't figure out how to select only sketch profile geometry in Fusion 360.

What am I missing?

[PhilProcarioJr]

@JDMather

Turn the body visibility off select the face turn the body visibility back on and it will do what you want.

Edit: I just noticed this doesn't work on your file but does on his...seems there is a bug...

Having it work the way it does today is nice because it treats existing geometry as sketch entities without having to create them.

[etfrench]

I think what you're missing is that all of the features on the face you selected are in the sketch.  The bug is twofold, one the color chosen for the sketch items doesn't have enough contrast to be easily visible, and two, the color isn't settable.

If you select all of the items in the sketch, right click, and select 'Break link', all will be visible.

[JDMather]

So how do I turn off auto-projection so that Fusion doesn't project what I don't want to begin with?

[schneik-adsk · Accepted solution]

when a sketch is created on a face the face boundary is converted into invisible edges.this has a lot of advantages in many workflows, but in this one case it is a hinderance. you can clear these edges easily. put the sketch on the face then window the face and delete the invisible edges. then project the edges you want and extrude just like solidworks or inventor.

[JDMather]

OK, I've got it now.

As I alluded in the previous screencast the way I would really do it in the other softwares would be to project the entire face and then window select the unintended geometry and change to construction.

So that is what I did in my attempt below.

I might suggest making it more obvious that there is projected geometry there - especially when I turned off the body visibility - I would expect to see obvious wires.

And when I changed to Construction (which I might want to toggle back to normal for some portion at some time) the Construction is really not apparent.

 Note also the problem with Extrude - Through All, I didn't check if that issue was specific to this file.

[JDMather]

Maybe something like this, but that might still only be discoverable after turning off the body visibility unless a unique wire color was used.

I have always worried about the overhead of auto-projected geometry that I was never going to use (especially on complex faces, like maybe a gear).  But I have never done any experiments to see if that is a valid concern.

[HughesTooling]

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@Anonymous wrote:

I have always worried about the overhead of auto-projected geometry that I was never going to use (especially on complex faces, like maybe a gear).  But I have never done any experiments to see if that is a valid concern.

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Yes auto project does slow the sketcher down, see this thread. Wish there was a way to turn it off.

https://forums.autodesk.com/t5/design-validate-document/terrible-performance-trimming-lines/m-p/6787854#M90690

Mark