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how to set size in blender ? [message #51252] Thu, 12 July 2012 22:46 UTC Go to next message
avatar giorgiomartini  is currently offline giorgiomartini
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Ok, so i export fom blender to obj, but how do i know howbig it will be printed ?
Re: how to set size in blender ? [message #51258 is a reply to message #51252 ] Fri, 13 July 2012 01:39 UTC Go to previous messageGo to next message
avatar Fredd  is currently offline Fredd
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Download Meshlab. It will show the same dimensions as Shapeways will. Netfabb can handle STL format, which helps in Blender, as 1 blender unit will be regarded a a mm, if you set it to mm when you upload.
Meshlab is your best bet, since I have no experiance with OBJ files, and can only advise to dl Meshlab.Smile

I ran a test for you with a object file format. I exported a OBJ file of a cube in blender 10x10x10 blender units. Set scale at mm. Result at shapeways was 10x10x10, with correct volume and dimensions for mm

[Updated on: Fri, 13 July 2012 03:36 UTC]


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
Re: how to set size in blender ? [message #51269 is a reply to message #51258 ] Fri, 13 July 2012 09:22 UTC Go to previous messageGo to next message
avatar giorgiomartini  is currently offline giorgiomartini
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Thanx, and how do i know what the final price will be depending on how many cm2 ?

thanx !
Re: how to set size in blender ? [message #51272 is a reply to message #51269 ] Fri, 13 July 2012 12:14 UTC Go to previous messageGo to next message
avatar Mswlik  is currently offline Mswlik
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also you can change what type of units are shown, metric or imperial. You can do this by going into the scene tab in the properties window.
Re: how to set size in blender ? [message #51325 is a reply to message #51272 ] Sat, 14 July 2012 16:18 UTC Go to previous messageGo to next message
avatar christopherlowe  is currently offline christopherlowe
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use blender!

You can set blender to whatever units that you want and they will be used. i would certainly suggest not outputting obj files and recommend stl files. the only thing is that when you do that you note what is your units- metric or standard- and then when you upload that is what you use... this way metric is equal to mm though.


please visit my blog at...
http://chrisshopofmodels.blogspot.com
Re: how to set size in blender ? [message #51329 is a reply to message #51252 ] Sat, 14 July 2012 18:09 UTC Go to previous messageGo to next message
avatar Fredd  is currently offline Fredd
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When you upload the model, will tell you its volume, as was mentioned before. To get the cost, multiply the cost/ cubic centimeter by the volume.(This does not include shipping and handlng.*Shakes Fist at UPS)

I forgot to mention in a earlier post, that the dimensions for an object can be found in the N property panel, while in object select mode. Another tidbit is that if you ever scale an object in object mode, you have to apply scale(CTRL A) , or just scale it in edit mode, without having to apply scale. This is needed also if you want the correct wall thickness to be applied using the solidify modifier, to name a few.

The dumb Imperial/Metric scale is options are just used for precise dimensions for renders.i.e making renders for models of a certain measurement format, more or less. Regard a BU as a mm, as mentioned above


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
Re: how to set size in blender ? [message #51341 is a reply to message #51329 ] Sat, 14 July 2012 22:44 UTC Go to previous messageGo to next message
avatar christopherlowe  is currently offline christopherlowe
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blender is able to do everything that you ask if you set it up properly... no need for any other programs...

please see my youtube video for how to set up blender for printing...

http://youtu.be/dGs-c-YIGbM

chris


please visit my blog at...
http://chrisshopofmodels.blogspot.com
Re: how to set size in blender ? [message #51440 is a reply to message #51341 ] Mon, 16 July 2012 22:29 UTC Go to previous messageGo to next message
avatar mygadgetlife  is currently offline mygadgetlife
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I'm definitely a Blender newbie, but I've been working with models at Blender's default primitive scale, i.e. a new circle, cylinder or cube scale.

I build the model, export to STL, then check the integrity and dimensions with netfabb (the free edition). I can upload to Shapeways and check the dimensions of the bounding box - mostly it's height I'm looking at.

If the dimension isn't what I expect, I take a calculator and divide the Shapeways dimension into the desired dimension to create a scaling factor. This can be applied to the model in Blender then the model exported again to STL.

I know it sounds terribly fiddly, but I find the cameras/viewports work best at Blender default scales (I get a lot of Z clipping if the model is 'big') - maybe I need to practice with scene scales to smooth the workflow!

The opposite is true of Sketchup, where it's better to work in a huge scale, then scale the models down. I guess I'm applying that in reverse to Blender.


mygadgetlife.blogspot.co.uk
Re: how to set size in blender ? [message #51443 is a reply to message #51252 ] Tue, 17 July 2012 03:43 UTC Go to previous message
avatar Fredd  is currently offline Fredd
Messages: 350
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For Blender, to create models for a 3D printer, be careful about scaling in object mode. Thats for scenes, not the precise mesh you need for a printer. Scale in edit mode, or use apply scale to the object if you just have to scale it in object mode.. Just consider that Shapeways will regard a Blender Unit as 1 mm. And as Stoney said" This is or the real world."


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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