Sketch: behaviour of intersecting profiles

[Anonymous]

Hello!

I've been using Fusion 360 for some time, and started using Inventor a couple of weeks ago. While sketching (and extruding/revolving), I've noticed that the behaviour of intersecting profiles differs between both softwares. Namely, in Fusion all lines/curves intersections produce valid profiles, while on Inventor this behaviour seems absent. 

The picture below should help illustrate this: On the left, the Fusion sketch can be extruded in the region where the circle and the rectangle intersect, but this can't be done on Inventor (I can select only the full rectagle or the full circle). 

I'd very much like to have the same behaviour of Fusion within Inventor, and I assume I'm missing out some very obvious configuration or setting to do so. 

Any help would be greatly appreciated, 

Best regards.

[admaiora · Accepted solution]

Yes they are different.

You can use construction lines, you can use points...but at the end they are different software with different behaviors.

[Anonymous]

That's unfortunate. I find Inventor's sketch behaviour rather cumbersome, specially when working with more intricate sketches.

Thank you for the prompt reply! 

[johnsonshiue]

Hi Martin,

Inventor has room for improvement in this case. Actually, I am surprised that it works in Fusion. I will work with the project team to understand the behavior better and how we can improve it.

Many thanks!

[Anonymous]

Hi Johnson, 

Thanks, I appreciate it 🙂 Inventor is an amazing tool, but I've faced some weird quirks while working with sketches.

I've been consistently wasting time trying to make Inventor "understand" which profiles I want to extrude/revolve - in sketches that would otherwise work fine within Fusion or other CAD packages I've used in the past. 

By the way, is there some sort of automatic profile/closed-loop highlighting (during sketching, as default in Fusion) available in Inventor? 

Thanks for the prompt reply! 

[johnsonshiue]

Hi Martin,

Actually, you can get the desirable profiles by adding two points where the circle intersects the rectangle. This trick works in cases that intersection is relatively straight forward. Like I mentioned before, there is room for improvement here.

I am not familiar with the profile pre-highlighting behavior. In Inventor, if a profile can be selected, it will highlight when cursor hovers into the region of the profile.

Many thanks!

[Anonymous]

Hi Johnson,

 I'll try that out! Thanks for the response!

[salariua]

and.... WORKPOINTS once again....

Inventor will see these as discontinued loops and allow individual profile selection.

You could use Break to split the curves but then you need to constrain the new segments.

[TheCADWhisperer]

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@salariua wrote:

and.... WORKPOINTS once again....

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I think you mean Sketch Points.

Work Points and Sketch Points are entirely different.

[salariua]

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TheCADWhisperer wrote:

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I think you mean Sketch Points.

Work Points and Sketch Points are entirely different.

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Yes you are correct,

Sketch points or sketch center points will both work.