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PowerPack Pro Mesh to Analytic Issue
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gjames  
#1 Posted : Friday, May 20, 2016 8:12:09 AM(UTC)
gjames

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When I try to convert one of these Meshes to an Analytic it does a strange thing (at least it is viewing strange).

I am uploading a file to show an array of the meshes I want turned into a solid.

If I isolate just one of these meshes it appear the one side of the solid is not the same as the other side of the solid.


Again it is really hard to explain.

The mesh starts at a triangle shape at the end and goes to a vertical line on the other. The surface on each side of the mesh has to twist in to meet at the end.

When I convert this to a solid it appears while rotating it that it created the solid incorrectly. Maybe it didn't and it just appears this way on screen. I really cant be certain.


That is why I am asking on here for someone to take a look at it for me.


Thank you.
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Tim Olson  
#2 Posted : Friday, May 20, 2016 9:55:29 AM(UTC)
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>>That is why I am asking on here for someone to take a look at it for me.

I used the Mesh to Analytic tool and looked at the resulting solids. They appear to be fine. I did a couple of things.

--Use Verify : Check Object.
This will make sure the solid has all the right underlying math per ACIS. (water tight, edges connected to faces, gaps, tolerances, etc)

--2D Section Cuts
I use this to help visualize a 3D shape in 2D. Sometimes I see things better as 2D section cuts. I find the Infinite Plane : Along Curve useful. The 2D section cuts appear to look good.

I noticed the original quads were warped (not planar), but it looks like the algorithm converted these to triangles.

If you find a solid that fails Check Object or produces an intersecting 2D cross section please let me know.

Attached is the file.

Tim

Edited by user Friday, May 20, 2016 10:04:32 AM(UTC)  | Reason: Not specified

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Tim Olson
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gjames on 5/20/2016(UTC)
24c  
#3 Posted : Friday, May 20, 2016 11:01:56 AM(UTC)
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Tim,

That's a useful feature Infinite Plane>Along Curve, but how do you get the 2D section cuts?
I really didn't want to ruin the thread, but I can't seem to find it.

SOLVED I saw this video link http://www.csi-concepts....os/sectionProperties.mp4
All is revealed, so ignore my question. :doh

MIke
PS Left it up, in case anybody else was struggling with that one! ;)

Edited by user Friday, May 20, 2016 11:46:11 AM(UTC)  | Reason: Found the ANSWER

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gjames on 5/20/2016(UTC)
gjames  
#4 Posted : Friday, May 20, 2016 2:41:34 PM(UTC)
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Originally Posted by: Tim Olson Go to Quoted Post



I noticed the original quads were warped (not planar), but it looks like the algorithm converted these to triangles.


Tim



That is what I suspected was happening. I have attached the Mesh before I turn it into a solid. Is the mesh incorrect???


EDIT UPDATE: Ok, so I wasn't able to do the cross section exactly as the video showed. However I just went ahead and did it manually every so often down the mesh. It appears that my mesh is correct. But when I convert to a solid the solid gets messed up as you see in the original post. How do I create this solid properly? Thanks.

I am actually trying to make the Triangle follow all the way down to the single vertical line. Since it is a polar array on a circle this was the only way I could think to try to make it all fit together.

I need to make it symmetrical as it is going to act like teeth on a gear. I wanted to keep the Height of the Triangle shape and have the base of the triangle shrink as it goes towards the center of the circle.


I will try playing with it some more. I'm sure there has to be a way to do this properly. I am just not sure how.


Thank you for the helpful TIP to visualize the solid. This will help tremendously.

Edited by user Friday, May 20, 2016 2:59:12 PM(UTC)  | Reason: Not specified

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24c  
#5 Posted : Friday, May 20, 2016 3:34:17 PM(UTC)
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Hi gjames,

I had a quick play, and used the lines in your model, surfaced those, then used the surface to solid tool.

I did a test slice using Tim's method above, and it works out OK this way.
Model attached as I modded yours, maybe it will help, and the solid part is hidden to see the correct sectioning, so you need to Show All to see your circles and stuff.

Mike

Edited by user Friday, May 20, 2016 3:43:23 PM(UTC)  | Reason: changed attachments with .vcp suffix

File Attachment(s):
Mesh%20before%20Solid_MC_mod.vcp (107kb) downloaded 7 time(s).
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surfaced_to_solid.png (51kb) downloaded 6 time(s).

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gjames on 5/20/2016(UTC)
gjames  
#6 Posted : Friday, May 20, 2016 4:19:46 PM(UTC)
gjames

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Originally Posted by: 24c Go to Quoted Post


I had a quick play, and used the lines in your model, surfaced those, then used the surface to solid tool.




Mike,

That looks correct! Thank you.

I thought I was using all the Surface to Solid Tools. Can you describe which Surface to Solid Tool you used?

Thanks!
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24c  
#7 Posted : Friday, May 20, 2016 11:00:59 PM(UTC)
24c

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Hi again gjames,

My bad, should have called it by its proper name aka "Stitch" a subset of the 3D Solid toolset.

Mike
24c attached the following image(s):
Screen Shot 2016-05-21 at 05.59.41.png (136kb) downloaded 5 time(s).
Screen Shot 2016-05-21 at 05.55.40.png (44kb) downloaded 5 time(s).
Screen Shot 2016-05-21 at 05.55.20.png (22kb) downloaded 5 time(s).

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gjames on 5/21/2016(UTC)
gjames  
#8 Posted : Saturday, May 21, 2016 9:23:00 AM(UTC)
gjames

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Originally Posted by: 24c Go to Quoted Post
Hi again gjames,

My bad, should have called it by its proper name aka "Stitch" a subset of the 3D Solid toolset.

Mike



I could have swore I used that tool also. However I cannot be sure.

I will try it again on Monday.

Thank you!!!!!


Have a great weekend.
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