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How do get your object the right scale? [message #56014] Sat, 27 October 2012 02:20 UTC Go to next message
avatar BeepBeep3D  is currently offline BeepBeep3D
Messages: 13
Registered: April 2010
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I've been trying to export a model from 3D Studio and have it be the same dimensions once it's uploaded to Shapeways.
I've tried DAE, STL, OBJ, and WRL and I'm having no consistent results.

The object is built to scale in MAX. But when I upload it often gives an error saying it was too big or too small.
I've tried setting MAX's units to MM, CM and M. I've tried picking the matching scale when I upload or even mismatched scales just to see what would happen.

DAE has scale built in while STL and WRL, OBJ and WRL do not.

I've uploaded about 30 times, this can't be good for the server having to check and reject or scale all these failed models.

Is there a magic setting I don't know that will make the file upload correctly?
Does it change from file to file?

Confused
Re: How do get your object the right scale? [message #56016 is a reply to message #56014 ] Sat, 27 October 2012 03:14 UTC Go to previous messageGo to next message
avatar Fredd  is currently offline Fredd
Messages: 350
Registered: November 2011
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Export a cube with dimensions of 1 x 1 x 1 as a stl. Upload it to shapeways, setting Sw upload measurement to mm.When its uploaded, edit the model to see its dimensions. If you wanted your model to have the dimensions of a cube cm 1x1x1, and SW lists dimensions cm .1x.1x..1, scale the original model by 10, upload again. This is a brute force technique excuse me. But it will get you uploading models the correct size till you get better advice on specifics. :} Upload tests are free also
Keith


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 do get your object the right scale? [message #56023 is a reply to message #56016 ] Sat, 27 October 2012 05:41 UTC Go to previous messageGo to next message
avatar BeepBeep3D  is currently offline BeepBeep3D
Messages: 13
Registered: April 2010
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Fredd wrote on Sat, 27 October 2012 03:14

Export a cube with dimensions of 1 x 1 x 1 as a stl. Upload it to shapeways, setting Sw upload measurement to mm.When its uploaded, edit the model to see its dimensions. If you wanted your model to have the dimensions of a cube cm 1x1x1, and SW lists dimensions cm .1x.1x..1, scale the original model by 10, upload again. This is a brute force technique excuse me. But it will get you uploading models the correct size till you get better advice on specifics. :} Upload tests are free also
Keith




Yeah, that was a good idea.
Alas it hasn't helped. Here's my results.

Max set to Meters Export as DAE(Meters) = Success

Unfortunately I'm want to print in Colour Sandstone.

Max set to Meters Export as WRL – Shapeways set to M = Fail (too big)
Max set to Meters Export as WRL – Shapeways set to MM = Fail (too small)
Max set to MM Export as WRL – Shapeways set to MM = Fail (too small)
Max set to MM Export as WRL – Shapeways set to M = Fail (too big)
Max set to CM Export as WRL – Shapeways set to MM = Fail (too small)
Max set to CM Export as WRL – Shapeways set to M = Fail (too big)

The error message from Shapeways doesn't tell me how big or small the it thinks the rejected file is, so I'd have to just guess different sizes until I found something that worked.
Re: How do get your object the right scale? [message #56024 is a reply to message #56023 ] Sat, 27 October 2012 07:08 UTC Go to previous messageGo to next message
avatar BeepBeep3D  is currently offline BeepBeep3D
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Registered: April 2010
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Did another experiment.

100mm cube in Max (set to mm) - Exported in WRL - Imported in mm to Shapeways - Produces a 3.94mm cube.
That's 25.38 times smaller.

So I made a 2538mm cube in Max (set to mm) - Exported in WRL - Imported in mm to Shapeways - Produces a 100mm cube.
Problem solved... I guess.

If I'm doing something wrong I'd like to know but if it is Shapeways that's pretty poor.
Why would it do that and why are there's no instructions or help for people who are trying to produce models.
If it's consistent why not check for it / scale object automatically?

Confused. Confused
Re: How do get your object the right scale? [message #56054 is a reply to message #56024 ] Sat, 27 October 2012 19:46 UTC Go to previous messageGo to next message
avatar Fredd  is currently offline Fredd
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Registered: November 2011
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For a dae it does not matter what upload setting you set at SW, it will print in whatever unit you set in your program.
Something odd but interesting, set units to meters in max, keep scale factor at 1. If you can change its dimensions(bounding box dimensions) change the values to cm for each. If you have a 10 x 5 x 12 for bounding box dimensions, reenter values if you want it printed in cm 10cm x 5cm x 12cm. Adding the cm at the end of the numeric value seems to do the trick. Now export to SW, choose meters.
I found out it works for dae, stl so far for uploads, in blender at least. This might possibly solve your problems.
Lol, so I am off to see if it works for a wrl and x3d file.
Keith
PS By the way if you ever get the 394 number, inches are involved 1 mm = .03934 inches


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 do get your object the right scale? [message #56056 is a reply to message #56054 ] Sat, 27 October 2012 20:28 UTC Go to previous messageGo to next message
avatar Fredd  is currently offline Fredd
Messages: 350
Registered: November 2011
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The technique actually worked uploading a x3d and a wrl textured model. SW dimensions matched with my programs bounding box dimensions.


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 do get your object the right scale? [message #56058 is a reply to message #56054 ] Sat, 27 October 2012 20:33 UTC Go to previous messageGo to next message
avatar JACANT  is currently offline JACANT
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Registered: July 2011
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http://www.shapeways.com/tutorials/exporting_to_vrml_and_x3d _for_color_printing
You will find the whole tutorial helpful.
This quote is taken from the page.
Q: Shapeways is telling me that my object is too big!
A: Remember that VRML97 and X3D expect your object to be measures in meters. So, if you want to create something that's 10mm long, you'll have to model it as 0.01m. Some 3D packages will allow you to select a scale during export. If not, you'll have to manually scale your model down by a factor of 1000.


jacantdesign@gmail.com
Re: How do get your object the right scale? [message #56071 is a reply to message #56058 ] Sat, 27 October 2012 22:58 UTC Go to previous messageGo to next message
avatar Fredd  is currently offline Fredd
Messages: 350
Registered: November 2011
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Well, if you have a modelling program where you cannot set scale, this works for x3d,wrl, vrml97. Using a model whose bounding box length is 11 units
1, Model dimensions in cm; scale by .01(11 cm length)
2. Model dimensions in mm; scale by .001(11 mm length)
3. If you want it in inches, scale by .0254(11" length
* This effects all bounding box dimensions

I am considering Chris Lowes technique, and Blenders good exporters/importers to make the above technique a thing of the past

http://www.youtube.com/watch?v=dGs-c-YIGbM&feature=share &list=UUHMnBBBXlYdPHfgEtebNssg

[Updated on: Sat, 27 October 2012 23:00 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 do get your object the right scale? [message #56245 is a reply to message #56071 ] Sat, 03 November 2012 04:08 UTC Go to previous message
avatar victorrings  is currently offline victorrings
Messages: 57
Registered: June 2012
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thanks for the plug sir!

i use MAX at work and if i remember correctly there is a glitch in that max defaults to whatever dimensioning technique that it sets at the start up... and i think i remember there are multiple places in the settings to change the measurements...

if you have something that works i would use that.

by the way this is my new shop i am peddleing my rings through. i model everything in blender and they are for sale at:

http://victorrings.weebly.com/

chris lowe
Senoir Designer-Victor Rings Design


my website is online at
http://victorrings.weebly.com/
RINGS GALORE!

 
   
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