Draft compute in one file, cannot on the other (spline related)

lacoste_quent
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Draft compute in one file, cannot on the other (spline related)

lacoste_quent
Observer
Observer

Hello,

 

I am working currently with SVG files, containing a design. 

This design is more or less splines, and I want to extrude this design and create a draft on it. 

The extrusion is ok. It is very thin thought, about 0.3mm. My problem is related with the next action: the draft.

 

I created two examples in order to explain myself. I'd like to understand why Fusion360 can compute the draft on the first file and not on the other. 

The wave is nearly the same. The only difference is the first wave (the ok one) is created with objects within Fusion360 toolbox, the other is a spline from an SVG (splines from F360 do not work as well).

 

Also, is there a workaround to get the draft done with the spline? 

 

Thanks a lot for your time. 

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Message 2 of 5

jhackney1972
Consultant
Consultant

In the file "Draft_KO", created from the SVG curve, edit the original sketch, select line and then select the Fix/Unfix sketch constraint.  This will remove the light green color and free up the sketch curve.  Finish your sketch and the Draft function will succeed.  The Draft process must be recreated.  It is easiest to use a Windows select to remove all the segments of the sketch at once.  Model is attached.

 

 

John Hackney, Retired
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jhackney1972
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If my Forum post solved your question, please select the "Accept Solution" icon to do three things. First it allows others to find a solution to a similar question, two, it closes the Forum post and last, it acknowledges that you accept the solution given. If you need further help, please ask. If you like to read why "Accept Solutions are important, take a look at this webpage.

John Hackney, Retired
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Message 4 of 5

lacoste_quent
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Hi,

 

Thanks for the fast reply. 

Indeed your file works. I figured that it is my angle that I want for the draft that is too pronounced. The fact that the sketch is locked or not does not affect the output. 

I've another question then: why F260 can compute a 10 degrees draft but not a 15 degrees? Just for my understanding... 

Thanks a lot, I'll put resolved after the answer. 

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Message 5 of 5

jhackney1972
Consultant
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Accepted solution

You can put a draft angle of a much larger value is you use Symmetric or Two Sides.  The reason there is a limit to the draft angle though is because the underlying geometry becomes unstable for the defined original sketch.   Attached is your model with a draft angle of 10 degrees symmetrically (20 degrees total) about the original body.

 

 

John Hackney, Retired
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