 Solidworks - Iphone 3g Back, How to surface the back of an Iphone 3G? |
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 Jan 26 2009, 01:47 PM
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#1
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CAD file  Group: Members Posts: 156 Joined: 29-March 05 From: Bonn, Germany Member No.: 1617 Status: Professional none  |
Hey,
When I'm trying to surface a body similiar to the back of the Iphone 3G (bent in all directions), I'm having the problem, that the edges always have a "dent". I tried it several times now, but I can't get them right. Two edges of the surfaces are splines. Any ideas?
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Jan 26 2009, 03:19 PM
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#2
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 Product Group: Members Posts: 367 Joined: 19-October 05 From: Toronto, Canada Member No.: 3440 Status: Professional The Grainery and Cooler Solutions Inc. |
Hey
How are you going about creating the surface? loft, sweep, fill, ? Without trying it, I would suggest sketching the bottom profile as a whole, set up planes at the front and side midpoints of the body, on those sketch the front and side profile curve respectively. Use those to create a surface fill with guide curves setting the contraints to tangent. Again, I haven't tried it, but that would be my first attempt. Newt |
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Jan 26 2009, 03:49 PM
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#3
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CAD file Group: Members Posts: 156 Joined: 29-March 05 From: Bonn, Germany Member No.: 1617 Status: Professional none |
Yep, that was also my try, but on the edges I always get those dents.
Even with more guide curves i can't tame the surface. |
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Jan 26 2009, 04:17 PM
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#4
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Blank paper Group: Members Posts: 4 Joined: 19-January 07 Member No.: 9255 Status: Student poly |
I would use loft for surface for best and fast result or use dome for solid.
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Jan 26 2009, 05:00 PM
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#5
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 Concept Group: Members Posts: 93 Joined: 13-October 07 From: Warsaw - Poland Member No.: 16124 Status: Professional CADvantage |
Boundary surface is a little bit better feature, you can set tangent type also for guide curves.
I think, you can try surface-sweep feature along edge and next filled surface to close the boundary and create solid body. -------------------- Pawel Keska
CSWP, CSWI, CSWST, CSWP-SURF, MTLS, WLDM |
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Jan 27 2009, 03:49 PM
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#6
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Concept Group: Members Posts: 73 Joined: 23-January 07 Member No.: 9393 Status: Professional Neufeld&Stein |
This may help - allthough I'm not shure which "dents" you mean.
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Jan 27 2009, 05:15 PM
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#7
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CAD file Group: Members Posts: 156 Joined: 29-March 05 From: Bonn, Germany Member No.: 1617 Status: Professional none |
Hey,
I already tried this method, but as soon as you want to use smaller radii/a thinner shape you'll end up with something shown below:
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Jan 27 2009, 09:24 PM
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#8
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Sketch Group: Members Posts: 43 Joined: 10-November 06 Member No.: 7750 Status: Professional College |
www.3dcontentcentral.com
There is a model already up on there. Cheers... |
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Jan 27 2009, 11:57 PM
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#9
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Sketch Group: Members Posts: 25 Joined: 10-March 05 From: Concord, MA Member No.: 1466 Status: Professional SJSU |
Krabbenkoenig
This is a great question and one of those classic tough problems that you see in hand-held shapes (the Palm Treo a few years back was even worse.) See the attached model I did a number of years ago, it might help you to discover a appropiate solution (yes it is a real production bar of soap.) Anyway, the key is to first only model one quarter of it. As far as the outer edge curve, don't use a line, arc, line but build a single spline so it is continuous or do a fit spline over the three. Use Boundary over loft - it can do C2 in both directions. Your on a great start because you realize that the designers at Apple don't design there products as solid models per say (blocks and fillets) but as surface models with C2 connectivity between faces. Also an advantage of Boundaryis that you have options for how the surface flows in the tangent influence dropdown as well as assigning connectors. These are great for "inflating corners" and getting the UV flow of the surface the way you intend it to be. Kind regards Mark Biasotti Dassault System'es - SolidWorks
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-------------------- Mark Biasotti
Product Manager - New Product Concepts Dassault Systemes - SolidWorks Corporation |
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Jan 28 2009, 10:25 AM
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#10
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CAD file Group: Members Posts: 156 Joined: 29-March 05 From: Bonn, Germany Member No.: 1617 Status: Professional none |
Hi,
Thanks for the reply. Any chance to get this file as a 2008 compatible version? greetings |
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Jan 28 2009, 06:04 PM
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#11
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 Product Group: Members Posts: 267 Joined: 25-May 06 From: Fresno, Ca Member No.: 5796 Status: Professional zxys.com |
There are so many ways to do this,... here are 7 iterations.. (using 2006)
I don't have 2009 either so Mark's soap bar (he may have it in a 2008 version?) is adding another way... using the new loft feature (Boundary-Surface, introduced in 2007,.. improved in 2008 and last I saw,.. much better in 2009) which gives you additional control on the boundary influence/conditions. So,.. try out "Boundary-Surface"... just replace/swap out the older loft features too see what/how/where... it's offers more control to give you the look and clean up the surface more so..
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Jan 29 2009, 11:26 AM
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#12
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Concept Group: Members Posts: 73 Joined: 23-January 07 Member No.: 9393 Status: Professional Neufeld&Stein |
However - I find that the most continious shape and smooth Flow comes with
low density higher degree edited surfaces :
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Jan 29 2009, 11:42 PM
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#13
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Product Group: Members Posts: 267 Joined: 25-May 06 From: Fresno, Ca Member No.: 5796 Status: Professional zxys.com |
and,.. if it helps,.. here is another technique...
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Jan 30 2009, 02:29 AM
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#14
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Product Group: Members Posts: 267 Joined: 25-May 06 From: Fresno, Ca Member No.: 5796 Status: Professional zxys.com |
ok,.. one more to try and cleanup the last -8 corner,..
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Feb 22 2009, 10:36 PM
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#15
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Sketch Group: Members Posts: 8 Joined: 18-July 05 Member No.: 2550 Status: Professional mmtco |
Gentlemen, these are great examples to work off of for some more challenging designs I am working on now. I have scoured the internet and bought every SolidWorks book and have not seen these types of examples. There is way too much on solid modeling and not enough classical surfacing problems. Thanks for sharing your knowledge!!
-Tom |
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