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icon5.gif  Tube Minimum walls & Boolean subtract? [message #61631] Fri, 08 February 2013 21:00 UTC Go to next message
avatar Mechanical  is currently offline Mechanical
Messages: 18
Registered: January 2013
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Hi everyone,

I just received my first 3d printed model and there are some issues which i could use some help with.

I have 2 questions -

How do i get Shapeways to recognize hollow areas - it seems as though they were ignored completely and filled solid with print material.
In 3DSMAX i created the hollow using a Boolean subtraction rather than Shell, was this a mistake?

Also, has anyone attempted to create small tubes using FUD and what are the smallest tubes physically possible? I need tubes that are as small as FUD will allow and they need to be functional -they will transport liquid within them. The tubes from the model i received today were fused solid, although it seems the 3d printer did at least make an attempt at them Wink .

Thanks in advance folks,
Paul.

[Updated on: Fri, 08 February 2013 21:01 UTC]

Re: Tube Minimum walls & Boolean subtract? [message #61632 is a reply to message #61631 ] Fri, 08 February 2013 21:05 UTC Go to previous messageGo to next message
avatar Youknowwho4eva  is currently offline Youknowwho4eva
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Hollow areas need to be attached to the outside. Internal geometry that doesn't have a connection to the outside faces are automatically deleted.

For your FUD tubes, it's probably the support material inside them. Try soaking it in nail varnish remover for 10-15 minutes. May take a couple tries to get it all out.


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: Tube Minimum walls & Boolean subtract? [message #61633 is a reply to message #61632 ] Fri, 08 February 2013 21:18 UTC Go to previous messageGo to next message
avatar Mechanical  is currently offline Mechanical
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Registered: January 2013
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Cool, so do you have any idea how i connect hollow areas to outside faces in 3dsmax? Do i reverse the normals?

To be honest i think the tubes were kinda my fault, i tried to make them .5 mm ID and 1mm OD, oops Razz . I'm just wondering if anyone has done anything similar. At least i learned that .5mm ID is too small for transparent detail.

Thanks for the answers.
Re: Tube Minimum walls & Boolean subtract? [message #61634 is a reply to message #61631 ] Fri, 08 February 2013 21:26 UTC Go to previous messageGo to next message
avatar Youknowwho4eva  is currently offline Youknowwho4eva
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You need to make an actual hole in the model. If you want the support material to be able to come out you have to meet the minimum escape hole size listed for the material. So it's an actual hole in the model

Transparent detail and FUD are two different things. The minimum clearance for FUD is .05mm I haven't made tubes in FUD myself, but that suggests the sizes you used would work, as long as you can clean out the support material. If you used transparent detail, the minimum clearance is 2mm.


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: Tube Minimum walls & Boolean subtract? [message #61773 is a reply to message #61634 ] Mon, 11 February 2013 05:46 UTC Go to previous messageGo to next message
avatar GWMT  is currently offline GWMT
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I've printed straight FUD tubes 0.3mm inside diameter and found they almost always have to be cleaned out with a drill or reamer to get rid of all of the support material. 0.9mm tubes don't need cleaning so maybe 0.5mm-0.6mm might be the limit for 'no cleaning required'.
Re: Tube Minimum walls & Boolean subtract? [message #61787 is a reply to message #61773 ] Mon, 11 February 2013 13:13 UTC Go to previous message
avatar Mechanical  is currently offline Mechanical
Messages: 18
Registered: January 2013
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@ GWMT,

That's great thanks, i have a model ordered that has .6mm ID tubes, hopefully it turns out ok and i'll let you know the results for other peoples future reference, thanks again,
Paul.

[Updated on: Mon, 11 February 2013 13:13 UTC]


 
   
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