| Hollowing out does not change price [message #62903] Thu, 28 February 2013 01:09 UTC |
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Hi,
I'm working on a case for the iPod nano 6 that would essentially turn it into a pocketwatch. The problem is that since the case needs to be 6cm diameter (the diagonal of the ipod), it ends up being almost $50 for the case.
I went back to blender, and started hollowing it out (by adding meshes inside the mesh itself, essentially making it hollow), but the price does not change one cent.
I'm talking about WSF, not some fancy material, how does something like that end up being so expensive? and why does hollowing it out not affect anything?
Thanks,
-Sss
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| Re: Hollowing out does not change price [message #62916 is a reply to message #62903 ] Thu, 28 February 2013 06:56 UTC |
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If your model were a solid 6 cm dia x 1 cm thick, it would be a little over 28cc & under $50 - are the units of measurement and the dimensions correct on the model page?
For hollowing out, you need to connect the inner shell to the outer shell with a tunnel or hole that forms the 'escape hole' for the support material after printing - no escape hole = not hollow model.
Paul
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| Re: Hollowing out does not change price [message #62917 is a reply to message #62916 ] Thu, 28 February 2013 07:41 UTC |
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Thanks for the reply. I'm pretty new to this whole thing (even though I've been subscribed for so long, I didn't really think about it).
I did calculate it to be approximately 50, too. I have a question then, if it's alright to ask.
i.materialize seems to have options in about the same sizes for a much lower price, how are they able to do this, then? Is the quality different?
(Is it alright that I ask about a competitor on here? I'm simply curious.)
I'll try again tomorrow with a hollow model.
Oh, last question: how big should the hole be?
Thanks,
-Sss.
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| Re: Hollowing out does not change price [message #62928 is a reply to message #62917 ] Thu, 28 February 2013 09:09 UTC |
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Oops, too slow--->
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Oh, last question: how big should the hole be?
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For hole size for Strong and Flexible plastic (polished and unpoilshed) (Strong and Flexible Design Guidelines):
Min Escape Hole: 4mm (1 hole), 2mm (2 holes), Big models (multiple holes)
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I have a question then, if it's alright to ask.
i.materialize seems to have options in about the same sizes for a much lower price, how are they able to do this, then? Is the quality different?
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Have you checked that you are comparing like with like? In the past, for a same sized model in the same or similar material, my experience is that they are more expensive. If this has indeed changed, that would be interesting.
[Updated on: Thu, 28 February 2013 09:10 UTC]
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| Re: Hollowing out does not change price [message #62929 is a reply to message #62928 ] Thu, 28 February 2013 09:25 UTC |
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As an example (just checked) my Potentiometer Scales from Shapeways cost 9.82 eur in wsf and 11.94 eur in Alumide.
From the other site, the same .stl file gives prices of 12.50 eur and 15.00 eur respectively (assuming that wsf equates to PolyAmide and Alumeide is the same on both sites).
This does not take into account any volume (bounding box packing) discounts.
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| Re: Hollowing out does not change price [message #63003 is a reply to message #62928 ] Fri, 01 March 2013 05:10 UTC |
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So, i.materialise's pricing seems to be a different model: If it fits within a certain volume, it gets x price, no matter the actual volume.
The scales you showed and my pocketwatch both fit within the 125cm^3 volume, so they get charged the same no matter what.
I'm staying with shapeways though, as the quality is apparently better and the detail is nicer, and that's what's the most important to me. Plus the fact that the price for shipping totally kills their price advantage over shapeways, so it's not even that much of a difference at the end.
Anyways, what materials would you guys think an ipod cover/pocketwatch should be made out of? I'm planning for WSF or CSF, seeing as it does need to safely hold an ipod, but I don't know much about this.
Thanks,
-Sss
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| Re: Hollowing out does not change price [message #63033 is a reply to message #62903 ] Fri, 01 March 2013 16:12 UTC |
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with the volume not changing I wonder if it the face normals are not correctly oriented.they are very important for defining material volume.you can attach the blend file here in a post if you want someone to take a look at it.The Solidify mod is nice for creating wall thickness in Blender
Have any questions regarding Blender, and need fast answers, you are always welcome at the IRC Server Freenode, channel #blender. As a bonus, several there have experience in modelling for 3D prints.
Keith
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| Re: Hollowing out does not change price [message #63075 is a reply to message #63033 ] Sat, 02 March 2013 00:32 UTC |
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I figured out how to hollow it! Thanks everyone! I'll make a few more adjustments then post it in WIPs.
Right now I'm just waiting for blender to start responding again (I accidentally clicked on skin instead of solidify in a highly subsurfed model 
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| Re: Hollowing out does not change price [message #63077 is a reply to message #63033 ] Sat, 02 March 2013 01:59 UTC |
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| Fredd wrote on Fri, 01 March 2013 16:12 |
with the volume not changing I wonder if it the face normals are not correctly oriented.they are very important for defining material volume.you can attach the blend file here in a post if you want someone to take a look at it.The Solidify mod is nice for creating wall thickness in Blender
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Really?
Shapeways Mesh Medic sorts out the normals 
Paul
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| Re: Hollowing out does not change price [message #63080 is a reply to message #63077 ] Sat, 02 March 2013 03:14 UTC |
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So I'm almost done. Front face is completely finished, back face still needs a bit of work, because I'm not sure what to put on there. I'll post a render later this evening (PST).
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