Sketch Should Be Closed Profile But Isn't

[therealsamchaney]

I have a sketch "Sketch Rib" which has a cross-shaped element in it which I had previously extruded but now one side will not extrude (I'm not sure what change caused this). I checked the sketch and found that one side isn't recognized as a closed profile any longer, even though it ought to be. The other side is recognized as a closed profile and this side is identical. There are no gaps in the lines, no construction lines that would cause an issue, and the sketch is not under or over-constrained. One of the profile sides consists of a projected control point spline but this should not be an issue as this is the case for the other half of the sketch as well which is working fine. Is this a bug or am I missing something? I've added a screencast and the file in question.

Thanks,
Sam

 

[g-andresen]

Hi,

the file is missing.

Please upload it again.

günther

[artemSIV · Accepted solution]

Hello. Please look at this model, it is similar to yours. I am sure this will help you learn how to use function "web" correctly. Good luck to you🙂

[therealsamchaney]

The Fusion forum pages seem to be having an issue uploading the file. Let me know if you can access it here.

[therealsamchaney]

Thank you very much for putting this model together. Yes the Web tool will work well for this feature, I just generally like to make features manually so I have more control over them. I would still like to know why Fusion doesn't consider this profile to be closed so I can better understand how it makes that determination.

Thanks,
Sam

[g-andresen · Accepted solution]

Hi,

there´s just a strange line.

I replaced it with a new one and reconnected it to the others.

replace line & create coincidence

günther

[therealsamchaney]

Thank you, yes that line is a control point spline which is projected from an intersection command. The thing is, the other half of this sketch has the same control point spline but there is no issue with that side being a closed profile, so I still do not understand what the root cause of the issue was. Also I would ideally like to keep that control point spline as it represents where the side wall which is actually slightly curved intersects the sketch plane. 

Anyway, I think you're right that the web tool is the simplest and most elegant choice here so I will mark that as the solution. I just wish Fusion weren't so mysterious with these issues.

[g-andresen]

Hi,

Sometimes projections of splines are root of problems.

That's why my first glance is directed at them.

günther

[artemSIV]

Fusion error is connected with this projection.

I left the model parametric in the following way.

[therealsamchaney]

Thank you artemSIV for taking the time to figure out this solution. I have already tried using coincident constraints like you show here which works sometimes, but often when I change the width parameter in the model it still breaks. So, I have decided to compromise and go with a web tool based solution like you suggested in your first answer. I selected that as one of the accepted solutions.

Thanks!
-Alterius