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magnetic objects [message #48526] Wed, 16 May 2012 12:53 UTC Go to next message
avatar kiorodesign  is currently offline kiorodesign
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The 3D metal printing process seems to produce magnetic objects. Watch the video...


http://www.youtube.com/watch?v=WP8mNJBE0UQ


KIORO'design Team Ciro & Giovanna
Re: magnetic objects [message #48529 is a reply to message #48526 ] Wed, 16 May 2012 13:53 UTC Go to previous messageGo to next message
avatar GlenG  is currently offline GlenG
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The SS component of the print media is alloy 420 stainless, which unlike 300 series alloys can be magnetized. Printed parts are processed in controlled atmosphere electric furnaces.The heating coil arrangement in these furnaces is circular array. Like a coil surrounding the batch of parts during operation. This might be the source of parts becoming magnetic. Usually this is almost in-detectable in a given part. Your video of those "propellers" is quite remarkable actually! Probably some Big Science going on but I sure can't explain it.
-G


"Where the spirit does not work with the hand, there is no art."
Leonardo da Vinci
Re: magnetic objects [message #48530 is a reply to message #48529 ] Wed, 16 May 2012 13:59 UTC Go to previous messageGo to next message
avatar kiorodesign  is currently offline kiorodesign
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thanks for the very detailed technical explanation...
Ciro


KIORO'design Team Ciro & Giovanna
Re: magnetic objects [message #48536 is a reply to message #48530 ] Wed, 16 May 2012 17:14 UTC Go to previous messageGo to next message
avatar GlenG  is currently offline GlenG
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Kioro,
Just a guess, probably not the whole story. Most parts do not come out magnetized like your turbine design. This would make a nice science project for some brainiac Very Happy

-G


"Where the spirit does not work with the hand, there is no art."
Leonardo da Vinci
Re: magnetic objects [message #48539 is a reply to message #48526 ] Wed, 16 May 2012 17:59 UTC Go to previous messageGo to next message
avatar stop4stuff  is currently offline stop4stuff
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Is it that 'Shapeways produce magnetic odjects' or is it that Shapeways produce objects have the properties to infulence the Earth's magnetic field?

Laughing
Re: magnetic objects [message #48542 is a reply to message #48539 ] Wed, 16 May 2012 20:57 UTC Go to previous messageGo to next message
avatar stonysmith  is currently offline stonysmith
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To influence the magnetic field of the EARTH.. you'd need a printer with a slightly larger build volume.


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Re: magnetic objects [message #48548 is a reply to message #48526 ] Wed, 16 May 2012 22:21 UTC Go to previous messageGo to next message
avatar Mary.Huang  is currently offline Mary.Huang
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Wow that video is really cool!
So, is it the turbine shape that made the print come out magnetic?
Will it happen again if you order other print of the same model, or was it a one time fluke?
Re: magnetic objects [message #48549 is a reply to message #48548 ] Wed, 16 May 2012 22:28 UTC Go to previous messageGo to next message
avatar GlenG  is currently offline GlenG
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Good question Mary. The phenomena is unintentional, we would probably need and expert in electromagnetics to explain it.
-G


"Where the spirit does not work with the hand, there is no art."
Leonardo da Vinci
Re: magnetic objects [message #48580 is a reply to message #48526 ] Thu, 17 May 2012 12:29 UTC Go to previous messageGo to next message
avatar ggurov  is currently offline ggurov
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what would be a case where having an SS part be magnetized, even slightly, be detrimental ? i could see not wanting various pieces be magnetized if you work around computer parts, especially hard drives, but the magnetic field would have to be quite a bit bigger there to do any kind of damage.


Database Architect, DBA, Datacenter guru, infrastructure wizard, none of the above.
Re: magnetic objects [message #48585 is a reply to message #48542 ] Thu, 17 May 2012 12:52 UTC Go to previous messageGo to next message
avatar Youknowwho4eva  is currently offline Youknowwho4eva
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stonysmith wrote on Wed, 16 May 2012 20:57

To influence the magnetic field of the EARTH.. you'd need a printer with a slightly larger build volume.


Or a man and a wench http://en.wikipedia.org/wiki/Coral_Castle

Back on topic, could it be caused by polishing, sanding of sprues?


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
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Re: magnetic objects [message #48938 is a reply to message #48526 ] Fri, 25 May 2012 18:55 UTC Go to previous messageGo to next message
avatar lensman  is currently offline lensman
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I have magnetized my stainless steel pieces when polishing them... and part of the process involved using a stainless steel brush in a Dremel...

Glenn


Glenn ------ My Website Third Dimension Jewellery
Re: magnetic objects [message #48947 is a reply to message #48938 ] Fri, 25 May 2012 22:22 UTC Go to previous message
avatar GlenG  is currently offline GlenG
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Yah that could definitely do it. Even on a piece of plain steel friction can induce magnetic properties. This is very slight but observable. It's generally not a problem and can be reversed with the use of a de-magnetizing tool.
-G


"Where the spirit does not work with the hand, there is no art."
Leonardo da Vinci

 
   
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