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Getting rid of a small feature...

aptivaboy

Senior Member
Hi all,

I'm CADding up a bridge for a Star Trek model that will eventually be printed into a commercial kit (I hope) and I've run into a snag. The bridge dome keeps ending up with a little lip on the leading edge of the dome. Its there no matter what I do to the sketches. Any ideas on how to eliminate it? I just want a nice smooth flow there, a smooth transition, not that little lip that keeps appearing.

Many thanks!

Bob
 

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    That darned lip.jpg
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Oldbelt

Senior Member
Your 3-d guide curves dosn't hit the 2 sketches.
 

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bigseb

Alibre Super User
Bob, have a look at the attached file. You can play around with the tangency settings of the loft. That should do it too. Much shorter tree too.

Capture.JPG
 

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Oldbelt

Senior Member
Bigseb thats right, but the original 3-d guide curve was cirkels, that can't be made by the tangency parametres.
 

bigseb

Alibre Super User
Bigseb thats right, but the original 3-d guide curve was cirkels, that can't be made by the tangency parametres.
Its a Star Trek model, so possibly not that important! Also - and this isn't meant to be disrespectful to the OP - but maybe he just didn't know how to do it differently.
 

aptivaboy

Senior Member
No offense taken. I appreciate and value any and all help. I can't open the file since I have an older version of Alibre but I'll keep playing with it. I went with the tangent parameter because global and local resulted in some exceptionally odd shapes. Only tangency got me anywhere near close. MOI may be the answer here, although I tend to have horrible times exporting from MOI into Alibre. The pipeline works well in the other direction for me, alas...
 

bigseb

Alibre Super User
No offense taken. I appreciate and value any and all help. I can't open the file since I have an older version of Alibre but I'll keep playing with it. I went with the tangent parameter because global and local resulted in some exceptionally odd shapes. Only tangency got me anywhere near close. MOI may be the answer here, although I tend to have horrible times exporting from MOI into Alibre. The pipeline works well in the other direction for me, alas...
FWIW: the loft settings in my file are as follows:
Sketch 1: no tangency
Sketch 2: Tangent magnitude = 1.5 and tangent angle = -90.

That's it really. Maybe play around with tangent magnitude for sketch 2 i.e. plus/minus 0.1.
 
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