N Gauge Forum

Your Layout and Models => 3D Modelling => Topic started by: bbdave on January 14, 2012, 02:45:16 PM

Title: How does 3d printing work?
Post by: bbdave on January 14, 2012, 02:45:16 PM
I have been reading with interest some of the 3d printing threads can some one explain how they work not the printer itself but how do you draw your designs and what material do they print in?

Dave
Title: Re: How does 3d printing work?
Post by: Stew2000 on January 14, 2012, 08:52:06 PM
Shapeways has a vast tutorials area and a forum which is useful.
http://www.shapeways.com/tutorials/ (http://www.shapeways.com/tutorials/)
Title: Re: How does 3d printing work?
Post by: Flakmunky on January 15, 2012, 08:48:05 AM
DISCLAIMER: I only have experience of the printer we have at work where we typically print 3d character models.

We model our object in a 3d modelling package. I use Mudbox and 3d Studio Max. This is then imported in to the printer software where the object is positioned (along with others) in the printer volume. The printer works out the cost of the materials. The print is set away over night.

Our printer uses a white powder which it spreads in a very thin layer over a platform. A print head then moves and fixes the powder in the required pattern with a very weak glue. The print head also contains a colour inkjet printer and it can colour the white powder as well.

The platform moves down slightly and a new layer is spread over the last which the print head fixes again. It slowly builds up the object in contours. When it is finished the excess powder is removed, the fragile object is then cleaned up and then the object is fixed with a much stronger glue. It can then be sanded, painted and laquered.

It isn't great for fine detail and I have never used it for N Gauge modelling.

Title: Re: How does 3d printing work?
Post by: Stew2000 on January 15, 2012, 11:13:36 AM
Your printer works with ceramics?
Title: Re: How does 3d printing work?
Post by: red_death on January 15, 2012, 07:28:43 PM
Blender (free from Blender.org) is a good 3D modelling package to do the design.

Once complete upload to the Shapeways website and print in Frosted Ultra Detail.
Title: Re: How does 3d printing work?
Post by: bbdave on January 15, 2012, 07:39:33 PM
I'm very intrigued by the whole process very interesting

Dave
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