Alias General Discussion

Alias General Discussion

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Contributor
next3
Posts: 16
Registered: ‎03-28-2010
Message 1 of 5 (307 Views)

Transitional surface help needed

307 Views, 4 Replies
03-29-2010 01:29 PM
Hello everyone.
I'm having problems with one transitional surface and would like to ask you to help me out.

I'm following a tutorial you can find under this link:

http://aliasdesign.autodesk.com/learning/tutorials/details/Modelling_A_Tennis_Racket_In_135991/

I also prepared a short presentation with images of the surface I'm having problems with:

http://docs.google.com/present/view?id=dfng7xtr_25hg34k2gh

I did achieve curvature continuity but not everywhere. On two places I have just position continuity.

Please give me a hand. I’m struggling with this surfaces for a month.

Thank you!
Active Contributor
kevinRichards
Posts: 45
Registered: ‎08-14-2007
Message 2 of 5 (307 Views)

Re: Transitional surface help needed

03-30-2010 07:52 AM in reply to: next3
can you post the surfaces?

first glance, it seems that the fillet should start and stop with the other surface boundaries.
Contributor
next3
Posts: 16
Registered: ‎03-28-2010
Message 3 of 5 (307 Views)

Re: Transitional surface help needed

03-30-2010 12:39 PM in reply to: next3
Thanx a lot for you interest.

The reason why I did that in two surfaces was because it was done also in that tutorial. The guy explained, that for one surface it is too much so it’s better to divide it in two. I had also to cut the surfaces from bottom. So it doesn’t need to twist so much.
I did also another presentation for you.

http://docs.google.com/present/view?id=dfng7xtr_33fcvrnjfn

First I was working under Catia tolerances but had to switch to user defined tolerances so the job is easier.

I attached also my file.

Thank you!
Active Contributor
kevinRichards
Posts: 45
Registered: ‎08-14-2007
Message 4 of 5 (307 Views)

Re: Transitional surface help needed

03-31-2010 09:33 AM in reply to: next3
here is an alternative solution. trying to create sections like the tutorial can become tedious. lots of experimenting.

here i just deleted the blends that you had, used freeform blend(set flow for the small side to default and the corner area to connect), and adjusted the shape with the slider, then patched the small surface with a square.

mirror the halves and used freeform blend again. i made sure that the flow settings were set to "Edge Align"
viola. 6 mins later... good enough for all practical purposes.

you may notice that there are 3 areas that do not create the Green C(i am using tighter tolerances than you used as well) but this seriously does not matter. the blend in the corner only needed a few manual tweeks of the CVs to make it Green. i was only moving them .001mm at a time. that is not a noticeable amount.


sure you could build this lighter, but this took no time, highlights nice, full history and stitches fine for production.
Contributor
next3
Posts: 16
Registered: ‎03-28-2010
Message 5 of 5 (307 Views)

Re: Transitional surface help needed

03-31-2010 01:21 PM in reply to: next3
Hello Kevin.

Thank you a lot for your help. I'll try to do that as you did and play with that surfaces for a bit. Anyway you already helped me a lot.

Many thanx. !
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