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Can anyone tell me the cause of this SLS imperfection? [message #51159] Wed, 11 July 2012 18:14 UTC Go to next message
avatar pdb  is currently offline pdb
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Registered: January 2012
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Firstly id just like to say this part wasnt printed by Shapeways, so i havent added it in the 3d printing topic.
Id just like a second opinion.

The imperfection only appears on the same side of all the 10 prints.
There are small areas where there was no powder to begin with, or the laser hasn't hit it?

Is it possible to get bubbles during the process? over-heating the the material?

For reference, the part in the picture has a diameter of 10mm

index.php?t=getfile&id=18384&private=0

  • Attachment: 1.jpg
    (Size: 394.43KB, Downloaded 157 time(s))


boop
Re: Can anyone tell me the cause of this SLS imperfection? [message #51196 is a reply to message #51159 ] Wed, 11 July 2012 23:25 UTC Go to previous messageGo to next message
avatar stonysmith is currently online stonysmith
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That almost looks like they added some sprue during the printing process, and then snapped them off during cleaning.


Patience, Persistance, Politeness - the 3Ps will help us get us to Perfect Printed Products
Re: Can anyone tell me the cause of this SLS imperfection? [message #51216 is a reply to message #51159 ] Thu, 12 July 2012 08:47 UTC Go to previous messageGo to next message
avatar pdb  is currently offline pdb
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Thanks for the reply.

They were printed within a box without sprue, so doubt this is the reason.

Some of them have a depth of just under 1mm

Thanks though.


boop
Re: Can anyone tell me the cause of this SLS imperfection? [message #51226 is a reply to message #51216 ] Thu, 12 July 2012 14:05 UTC Go to previous messageGo to next message
avatar BillBedford  is currently offline BillBedford
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Registered: November 2008
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If the imperfections were in the same place on all the print, it points to something on your meshes.


Bill Bedford
Re: Can anyone tell me the cause of this SLS imperfection? [message #51227 is a reply to message #51159 ] Thu, 12 July 2012 14:14 UTC Go to previous messageGo to next message
avatar Youknowwho4eva  is currently offline Youknowwho4eva
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To me, it looks like unsinthered material which can be caused by the laser needing to be calibrated, or impurities in the material.


I learned a long time ago the wisest thing I can do is be on my own side, be an advocate for myself and others like me. -Maya Angelou
michael@shapeways.com Community Advocate
Re: Can anyone tell me the cause of this SLS imperfection? [message #51276 is a reply to message #51159 ] Fri, 13 July 2012 13:50 UTC Go to previous message
avatar pdb  is currently offline pdb
Messages: 131
Registered: January 2012
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@ Bill , No the holes are in various places.

@Paul, thats what it looks like to me, they are reprinting them on a different machine to see if it reproduces the flaws.

Thanks for the replies.


boop

 
   
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