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Segments of a wheel rim are disappearing - what to do? [message #69828] Fri, 14 June 2013 13:16 UTC Go to next message
avatar Pico  is currently offline Pico
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I've uploaded this 7 times in the past several days and have yet to get it right. Every time I upload it I have random segments of the rim that disappear. I have run this through Netfabb each time and the file is whole but when it gets to Shapeways there are missing parts. This is a relatively complex part for me so I am lost about how to fix it. Any help would be appreciated. Thanks, Pico

Re: Segments of a wheel rim are disappearing - what to do? [message #69839 is a reply to message #69828 ] Fri, 14 June 2013 17:42 UTC Go to previous messageGo to next message
avatar Youknowwho4eva  is currently offline Youknowwho4eva
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Can you share the file?


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Re: Segments of a wheel rim are disappearing - what to do? [message #69843 is a reply to message #69839 ] Fri, 14 June 2013 18:11 UTC Go to previous messageGo to next message
avatar Pico  is currently offline Pico
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Here it is. Pico

Re: Segments of a wheel rim are disappearing - what to do? [message #69844 is a reply to message #69828 ] Fri, 14 June 2013 18:34 UTC Go to previous messageGo to next message
avatar Youknowwho4eva  is currently offline Youknowwho4eva
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It looks like the sections that are missing, are missing because you have internal faces. I'm seeing lots of red in netfabb and duplicate faces inside the rim.


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Re: Segments of a wheel rim are disappearing - what to do? [message #69858 is a reply to message #69844 ] Fri, 14 June 2013 21:26 UTC Go to previous messageGo to next message
avatar Pico  is currently offline Pico
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How do I eliminate the duplicate or internal faces? Thanks, Pico
Re: Segments of a wheel rim are disappearing - what to do? [message #69863 is a reply to message #69858 ] Fri, 14 June 2013 22:39 UTC Go to previous messageGo to next message
avatar Pico  is currently offline Pico
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I am going to download a plugin for Sketchup called cleanup which should eliminate the duplicate faces. Pico
Re: Segments of a wheel rim are disappearing - what to do? [message #69958 is a reply to message #69863 ] Mon, 17 June 2013 14:41 UTC Go to previous messageGo to next message
avatar Pico  is currently offline Pico
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Still having problems with this - I wasn't able to downloaded the plugins that I wanted so reworked the mesh but still having problems. Here's a pic of the item in Netfabb. How do I correct the yellow lines? Almost all of that rim in yellow disappears when I put it in Shapeways. Thanks, PElgin

Re: Segments of a wheel rim are disappearing - what to do? [message #70011 is a reply to message #69958 ] Tue, 18 June 2013 05:32 UTC Go to previous messageGo to next message
avatar stonysmith  is currently offline stonysmith
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Sorry for the confusion here.. When you look at it in Netfabb, the yellow lines are actually HOLES - it is telling you that you are MISSING a face at that spot (not that you have an extra one)

If you use the Netfabb option to "Close all Holes", it will attempt to close those holes.

The other trouble is that you have many, many segments of the circles turned inside out.. When in Netfabb repair mode, everything that is inside-out is a red color. You can attempt to use the option "Repair Flipped Triangles", but I didn't have a lot of luck with it on your file. It is these red segments that are being removed when you upload it. The red coloring says that the object has a negative volume.

I would go back to Sketchup and try re-exporting. The model is being exported as hundreds of separate peices, and it really would be better if it was a single peice (single shell). Did you happen to use the "ungroup" option in Sketchup? (you shouldn't have)

I seem to remember something in another forum posting about some setting in Sketchup that affects whether the peices are exported as a single peice or not, but I can't (yet) find that posting.


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Re: Segments of a wheel rim are disappearing - what to do? [message #70024 is a reply to message #70011 ] Tue, 18 June 2013 11:28 UTC Go to previous messageGo to next message
avatar Pico  is currently offline Pico
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Thanks for your informative comments; I'll work on this today. Pico
Re: Segments of a wheel rim are disappearing - what to do? [message #70048 is a reply to message #70024 ] Tue, 18 June 2013 17:54 UTC Go to previous messageGo to next message
avatar JACANT  is currently offline JACANT
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If you can share the original Skp file. On the forum, by PM, or my email below. I will have a look at it for you.


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Re: Segments of a wheel rim are disappearing - what to do? [message #70071 is a reply to message #70048 ] Tue, 18 June 2013 23:11 UTC Go to previous messageGo to next message
avatar Pico  is currently offline Pico
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I've worked on reversing faces, there are a lot of bolt heads that are going to be very time consuming. I still haven't figured on what to do with the yellow lines. Thanks, Pico

Re: Segments of a wheel rim are disappearing - what to do? [message #70103 is a reply to message #69828 ] Wed, 19 June 2013 15:14 UTC Go to previous messageGo to next message
avatar Pico  is currently offline Pico
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. I'm stumbling around about this quite a bit and appeared to have stumbled onto correct way to fix this and that is by grouping it. The errors are way down and when put through Netfabb and uploaded to Shapeways seems to have not lost any segmants. Using a plugin called Solidsolver on SU may have helped but I've tried a lot of different things and am uncertain which have helped. Pico
Re: Segments of a wheel rim are disappearing - what to do? [message #70104 is a reply to message #70011 ] Wed, 19 June 2013 15:16 UTC Go to previous messageGo to next message
avatar Youknowwho4eva  is currently offline Youknowwho4eva
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stonysmith wrote on Tue, 18 June 2013 05:32

Sorry for the confusion here.. When you look at it in Netfabb, the yellow lines are actually HOLES - it is telling you that you are MISSING a face at that spot (not that you have an extra one)

If you use the Netfabb option to "Close all Holes", it will attempt to close those holes.

The other trouble is that you have many, many segments of the circles turned inside out.. When in Netfabb repair mode, everything that is inside-out is a red color. You can attempt to use the option "Repair Flipped Triangles", but I didn't have a lot of luck with it on your file. It is these red segments that are being removed when you upload it. The red coloring says that the object has a negative volume.

I would go back to Sketchup and try re-exporting. The model is being exported as hundreds of separate peices, and it really would be better if it was a single peice (single shell). Did you happen to use the "ungroup" option in Sketchup? (you shouldn't have)

I seem to remember something in another forum posting about some setting in Sketchup that affects whether the peices are exported as a single peice or not, but I can't (yet) find that posting.


Good thing I called in someone more experienced with Netfabb!


The Mad Moder
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Re: Segments of a wheel rim are disappearing - what to do? [message #70193 is a reply to message #70071 ] Thu, 20 June 2013 18:17 UTC Go to previous messageGo to next message
avatar JACANT  is currently offline JACANT
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Pico wrote on Tue, 18 June 2013 23:11

I've worked on reversing faces, there are a lot of bolt heads that are going to be very time consuming. I still haven't figured on what to do with the yellow lines. Thanks, Pico


To reverse the faces of the bolt heads. Pick the top face of a bolt - right click - Select > All Connected. Right click again, while over the bolt head - Reverse Faces. That's the easy part.
The main problem with the model is you have faces on top of faces. That is why you are getting faces in the wrong direction. Which confuses the software into not knowing what is inside and what is out. Every time you draw a line on a face an extra face may be created which will be on top of the original face. You need to be very careful when drawing lines to make faces, that they are joined at the correct 'end point ' for example. If the face does not appear automatically when you close a shape, do not just draw another line. Find out why the face was not created, by checking the end points of the lines.
You need to delete all of the extra lines you do not want. If you end up deleting the wrong line a face will disappear, just redraw that line. Some of the lines will be invisible. Go to - View - Hidden Geometry to show them.
Another thing you need to do when drawing is once you have drawn a shape, say a bolt head, select it and use the command, Right click - Intersect Faces - with Model or Selection , depending what you are doing. Then all of the extra lines and faces that are not needed can be deleted.
What you are really aiming for is one outside shell with no internal walls or faces. Be methodical as you draw. It may take longer but you will have less problems if you do it as you go along.


jacantdesign@gmail.com
Re: Segments of a wheel rim are disappearing - what to do? [message #70205 is a reply to message #70193 ] Thu, 20 June 2013 20:49 UTC Go to previous messageGo to next message
avatar Pico  is currently offline Pico
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Thanks for the in depth reply. Much to chew on there. That will be tomorrow's job. Pico
Re: Segments of a wheel rim are disappearing - what to do? [message #70303 is a reply to message #70205 ] Sat, 22 June 2013 06:28 UTC Go to previous messageGo to next message
avatar JACANT  is currently offline JACANT
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I may have inadvertently deleted some of the faces. I don't know.
File sent by PM.
index.php?t=getfile&id=34893&private=0

[Updated on: Sat, 22 June 2013 06:38 UTC]


jacantdesign@gmail.com
Re: Segments of a wheel rim are disappearing - what to do? [message #70355 is a reply to message #70303 ] Mon, 24 June 2013 00:27 UTC Go to previous messageGo to next message
avatar Pico  is currently offline Pico
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Thanks very much for the help. I have printed out your comments and taped them to the wall over my monitor to keep me straight. Pico
Re: Segments of a wheel rim are disappearing - what to do? [message #70526 is a reply to message #70355 ] Wed, 26 June 2013 11:00 UTC Go to previous messageGo to next message
avatar JACANT  is currently offline JACANT
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Here is some good advice from @Denali 3D Design
http://www.mastersketchup.com/8-tips-for-3d-printing-with-sk etchup/


jacantdesign@gmail.com
Re: Segments of a wheel rim are disappearing - what to do? [message #70528 is a reply to message #70526 ] Wed, 26 June 2013 12:27 UTC Go to previous message
avatar Pico  is currently offline Pico
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Excellent article! Thanks. I've bookmarked it. Pico

 
   
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