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Can't Shell (#454)
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Art  
#1 Posted : Thursday, July 19, 2007 4:48:53 PM(UTC)
Art

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Does anyone have any great ways to repair a solid? I have been trying to shell this solid with an .090" wall for hours and only get errors. I have tried import/export, rebuilding from surfaces, verifying (no problems) and can't get anywhere.

Thanks in advance,

Art
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jlm  
#2 Posted : Thursday, July 19, 2007 5:36:37 PM(UTC)
jlm

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Hi Art,
I tried to shell your solid many ways, without success.

I'll tell you my usual debugging method : I cut the solid into pieces and try to shell each individual part to find the bad area.
With your tower, no luck, even a thin slice won't shell.
I think it's due to the small blends at the corners.
If you could shell before making the blends, maybe...

JL
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jol  
#3 Posted : Thursday, July 19, 2007 5:36:42 PM(UTC)
jol

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In my experience .. with fillet rounding applied that is as small or smaller than the required wall thickness .. a fail is guaranteed !

Unfortunately, the guys STILL - annoyingly - will not allow you to view the shelling logfile - as the fail dialog suggests. This annoys me intensely

Stuff u you already did:

- verified the object
- edit>simplified
- re-stitched by clicking on the object with the stitch tool - option - tolerance set to 0 .. depending upon the results of the verify object command
- export import as a SAT file

then I would ..

A. step back to before the complex tiny rounding and apply them after shelling

B. if you stilll get a fail - which is unlikely - chop it in half - this may at least allow you to deduce where the problem may be

C. hound the guys into allowing you to view the shelling logfile as the fail dialog suggests.

This has pissed me off since the dawning of time
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Art  
#4 Posted : Thursday, July 19, 2007 5:53:39 PM(UTC)
Art

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You guys are the best! Thanks so much. It makes total sense that I can't shell because of all the small radii. I just assumed that the interior surface would be square, but I understand why the computer would have problems with this.

Thanks for the quick response, after a while with problems like this. I just turn into a zombie and stare.


JL, thanks for taking a look at it. Now I guess I will be giving the "replace face" tool a workout.

Jol, I also agree with you. I seem to remember in Cobalt we would get a blink of a thick red line that would pont to where the problem is. Boy what I would give for a hint!

But, as you both point out, I bet the small radii are the problem.

Best regards,

Art
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Art  
#5 Posted : Thursday, July 19, 2007 7:43:09 PM(UTC)
Art

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Removed many of the convex radii and a small glitch and it shelled at .08" which is good enough for now.

Thanks for the advice guys!

Art
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jol  
#6 Posted : Friday, July 20, 2007 12:41:34 AM(UTC)
jol

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Great .. now if only we could see those log files .. that would point us straight to the offending faces that won't offset correctly !!

And yes, highlighting the surfaces that wont offset would be an absolute godsend !
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Tem  
#7 Posted : Friday, July 20, 2007 1:49:55 AM(UTC)
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Yes, but highlite the offending feature/surface in what color? I think that there should be system defaults, like red for this, and be able to customize this option as needed.
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Art  
#8 Posted : Friday, July 20, 2007 6:27:07 AM(UTC)
Art

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As I remember it, it was the default selection color. But, more importantly, the lines were a thick red. The curious part was that they were also immediately covered up by a non-movable dialog box, so you had to be quick! Pretty silly huh?

But, I am sure this was all invented by Tim! So perhaps we could have it back?

Art
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jol  
#9 Posted : Friday, July 20, 2007 6:35:08 AM(UTC)
jol

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No, that was the stitching tool .. that remains the same

Personally, after so many years waiting to see this logfile / fail region .. I don't care if it's highlighted crimson with yellow spots

I do take your point however .. why is it that the verify tools sometimes use green and sometimes use red as a highlight colour ?

Time we standardised !!!
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