Alias General Discussion

Alias General Discussion

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Valued Contributor
karthick_241187
Posts: 87
Registered: ‎12-04-2008
Message 1 of 6 (406 Views)
Accepted Solution

Edge of a Trimmed Surface Looking Scribbled

406 Views, 5 Replies
07-07-2011 09:34 PM

Hi Friends,

 

I have a doubt in Alias Surface. Hope u guys could help me.
 
I project curve on a complex sur and trim the surface.
the curvature comb in the edge of the trim surface looks very scribbled.

If i untrimmed and check the projected COS, but its looks fine.
 
I have attached a image file explaining the issue.
 
Pls find the attachment.



Thanks and Regard's
Karthick. P

i hope its only a filth in the screen of your system. it has nothing to do with with the design.

 

the othe reason may be the irrregular hull of your surface. check it out.

New Member
deepti14feb
Posts: 1
Registered: ‎07-11-2011
Message 2 of 6 (385 Views)

Re: Edge of a Trimmed Surface Looking Scribbled

07-11-2011 12:06 AM in reply to: karthick_241187

i hope its only a filth in the screen of your system. it has nothing to do with with the design.

 

the othe reason may be the irrregular hull of your surface. check it out.

Active Contributor
KevinDeSmet
Posts: 27
Registered: ‎07-09-2009
Message 3 of 6 (351 Views)

Re: Edge of a Trimmed Surface Looking Scribbled

07-23-2011 01:47 AM in reply to: karthick_241187

That's strange. I can only imagine that the cos in 3d space is more accurate than the projected cos that lies in the surface's parameter space.

 

You can create a curve, align it with the cos and check the deviation, make it a degree 5 curve or whatever and then use that to build off of/trim with instead of the cos. Can anyone chip in on this workflow in its complete form?

Distinguished Contributor
digiformer
Posts: 231
Registered: ‎09-30-2008
Message 4 of 6 (324 Views)

Re: Edge of a Trimmed Surface Looking Scribbled

08-03-2011 12:13 PM in reply to: karthick_241187

actually this is "normal" Alias behaviour to me. I have no explanation for it.

This phenomenon is there ever since i use Alias software.

 

Regards...

Valued Contributor
karthick_241187
Posts: 87
Registered: ‎12-04-2008
Message 5 of 6 (305 Views)

Re: Edge of a Trimmed Surface Looking Scribbled

08-03-2011 10:22 PM in reply to: karthick_241187
If the surface cv hulls are not proper then we ll get this kind of result. We cant take things normal if comb is irregular. If the comb is not proper then there is something wrong with the surf.
Thanks and Regard's
Karthick. P
Active Contributor
KevinDeSmet
Posts: 27
Registered: ‎07-09-2009
Message 6 of 6 (296 Views)

Re: Edge of a Trimmed Surface Looking Scribbled

08-05-2011 05:37 AM in reply to: karthick_241187

I recently got a trimmed c-o-s that looked really fine, I don't know if this is related but the only thing I messed around with recently were my construction options. I set it to CATIA V5 and copied it for a new preset, I then changed Trim Curve Fit to 0.0005mm because by default I think it is set very loose. And lots of intersect c-o-s were not giving my position in tolerance.

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