| Silver shrinks almost %2 [message #38214] Wed, 09 November 2011 02:55 UTC |
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I just learned a costly lesson today. Well the Frosted Detail plastic is spot on with it's print size, Silver has a very slight shrinkage. I had a jewelry item printed in Frosted Detail first, to see if it would fit my gemstones, as they both have similar wall thicknesses and detail levels (Silver is 1/10th of 1 millimeter rougher). The stones first perfectly in the Frosted Detail, as they were designed to. But in Silver, the stones were clearly too large for the setting. The setting measured 41.5mm long in Silver, but 42mm in Frosted Detail. That's a bit less then %2.
Since a larger error is better then small, I'm going to scale up my model %2 and reprint. $60 mistake. If you're designed a model to fit a stone, you should keep this in mind.
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| Re: Silver shrinks almost %2 [message #38236 is a reply to message #38214 ] Wed, 09 November 2011 14:01 UTC |
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I want to say that I saw the shrinkage factor somewhere, but I can't find it anywhere right now. Let me get a response from Nancy about that, as I think .5mm difference is larger than +or- 25 micrometers as the design rules states is the accuracy of silver. So don't re-order yet. As a side note, my settings have always been good enough. I'd say perfect, but I designed them so that they could be reasonably off and would still hold the stone.
I got ahold of Nancy, she says that the model should only be + or - 25 micrometers off. I'd contact support@shapeways.com about your model being .5mm off.
[Updated on: Wed, 09 November 2011 18:03 UTC]
The Mad Moder
michael@shapeways.com
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| Re: Silver shrinks almost %2 [message #38309 is a reply to message #38214 ] Thu, 10 November 2011 15:12 UTC |
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Hey there! The resolution on silver is actually pretty decent, it should be accurate within 25 microns (see here for reference: http://www.shapeways.com/design-rules/silver)
This might be a mistake on the print. Without looking at the specific model and order, I can't say for sure. In any case, I'll file a complaint for our customer service, and they will take care of you!
Thanks,
Nancy
Product Manager
Twitter: @nliang
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| Re: Silver shrinks almost %2 [message #38311 is a reply to message #38214 ] Thu, 10 November 2011 15:38 UTC |
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Hi MaxSMoke777,
Can you please sent me an email about this with the order number, a picture of the model and the complaint to service@shapeways.com?
After I have received your email I can create a complaint out of this for you.
Thanks,
Christel
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