Autodesk Inventor

[#1]

Yea, that's the new one they're using these days. In my day, the
saying was "That's cool".

What's not cool is my attempt to create a loft between two concave
sections and the outcome is a twist or an added facet where there
should only be a smooth transition. I've checked the sketches and they
are closed loops, fully constrained and inventor says they are happy
(no +). I've uploaded the file loloft.zip to the CF area. Can someone
take a look at this file. See the engineer's notebook in the file for
more comments.

Thanks,

-Jon G.

--
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||

Jon Genova
Senior Mechanical Design Engineer
BioServe Space Technologies

A NASA Commercial Space Center (CSC)

genovaj@stripe.colorado.edu
Bioserve URL http://www.colorado.edu/engineering/BioServe/
Personal URL http://stripe.Colorado.EDU/~genovaj/

[#2]

Point Mapping should fix it.
"Jon Genova" wrote in message
news:3DD557E4.128749D9@stripe.colorado.edu...
>
> Yea, that's the new one they're using these days. In my day, the
> saying was "That's cool".
>
> What's not cool is my attempt to create a loft between two concave
> sections and the outcome is a twist or an added facet where there
> should only be a smooth transition. I've checked the sketches and they
> are closed loops, fully constrained and inventor says they are happy
> (no +). I've uploaded the file loloft.zip to the CF area. Can someone
> take a look at this file. See the engineer's notebook in the file for
> more comments.
>
> Thanks,
>
> -Jon G.
>
> --
> ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
>
> Jon Genova
> Senior Mechanical Design Engineer
> BioServe Space Technologies
>
> A NASA Commercial Space Center (CSC)
>
> genovaj@stripe.colorado.edu
> Bioserve URL http://www.colorado.edu/engineering/BioServe/
> Personal URL http://stripe.Colorado.EDU/~genovaj/

[#3]

See CF under yours, you need to add rails, all this stuff is new to me I
just fiddled with your model . Some one will post a better solution. Rails
stop the loft twisting, the best way to make em though I not sure.

--
Laurence,

Power is nothing without Control
---


"Jon Genova" wrote in message
news:3DD557E4.128749D9@stripe.colorado.edu...
>
> Yea, that's the new one they're using these days. In my day, the
> saying was "That's cool".
>
> What's not cool is my attempt to create a loft between two concave
> sections and the outcome is a twist or an added facet where there
> should only be a smooth transition. I've checked the sketches and they
> are closed loops, fully constrained and inventor says they are happy
> (no +). I've uploaded the file loloft.zip to the CF area. Can someone
> take a look at this file. See the engineer's notebook in the file for
> more comments.
>
> Thanks,
>
> -Jon G.
>
> --
> ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
>
> Jon Genova
> Senior Mechanical Design Engineer
> BioServe Space Technologies
>
> A NASA Commercial Space Center (CSC)
>
> genovaj@stripe.colorado.edu
> Bioserve URL http://www.colorado.edu/engineering/BioServe/
> Personal URL http://stripe.Colorado.EDU/~genovaj/

[#4]

Hi, Jon.

I'd use point mapping instead of rails to correct your problem. Rails will
"force" the shape and point mapping will correct the twisted surfaces while
still allowing a relaxed progression between profiles. I'm not that familiar
with the procedure, but I've found it easiest to clear the Auto checkbox,
delete all the existing point sets (select and press ) then go back and
add mapping sets. Pay attention to the values so you are sure you've hit the
end of the curve (think you should get a green dot on vertex, but it's hard
for me to tell).

I don't know what your intentions are, but have posted another method in CF.
If you don't need the specific shape at Sketch2, I'd just loft between the
extrusion and Sketch1 with a tangent wt of .1 or .2 on the Edges profile. You
might try playing with it and see how close to the desired shape you get.

Jeff
====================

"Jon Genova" wrote in message
news:3DD557E4.128749D9@stripe.colorado.edu...

Yea, that's the new one they're using these days. In my day, the
saying was "That's cool".

What's not cool is my attempt to create a loft between two concave
sections and the outcome is a twist or an added facet where there
should only be a smooth transition. I've checked the sketches and they
are closed loops, fully constrained and inventor says they are happy
(no +). I've uploaded the file loloft.zip to the CF area. Can someone
take a look at this file. See the engineer's notebook in the file for
more comments.

Thanks,

-Jon G.

--
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||

Jon Genova
Senior Mechanical Design Engineer
BioServe Space Technologies

A NASA Commercial Space Center (CSC)

genovaj@stripe.colorado.edu
Bioserve URL http://www.colorado.edu/engineering/BioServe/
Personal URL http://stripe.Colorado.EDU/~genovaj/

[#5]

Good information. I'll check out the posted files this weekend.

Thank you for your time, gentlemen.



--
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||

Jon Genova
Senior Mechanical Design Engineer
BioServe Space Technologies

A NASA Commercial Space Center (CSC)

genovaj@stripe.colorado.edu
Bioserve URL http://www.colorado.edu/engineering/BioServe/
Personal URL http://stripe.Colorado.EDU/~genovaj/