Sketchup model looks perfect but makerbot fills in ring during print

SketchUp 3D Printing
1

I have a model that looks great in sketchup and i save as an obj file and bring into makerbot it looks great in preview. when i print it fills in my ring. anyone know what i am doing wrong?

90mm prototype base after bevel after holes after height smoothing hole.skp (1.2 MB)

2

Itā€™s just a skin and has no thickness.

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3

Itā€™s also not a Group of Component, which says you canā€™t have checked whether SketchUp regards it as a ā€œsolidā€. In fact it has a lot of flaws preventing it from being a ā€œsolidā€, and they are likely to interfere with 3D printing it successfully. Make it a Group or Component and try a tool such as ThomThomā€™s Solid Inspector or TIGā€™s solid solver to see the issues.

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4

Thanks, how do i add thickness? i am a newbie

5

thanks i will work on this now.

6

There are quite a few issues here. Probably best to start from scratch. Pretty easy to use the bottom plane as a reference, then use Push/Pul, then offset, then push/pull, and finally move to recreate the geometry:

As a side note, you have some odd things going on hereā€¦ the whole thing is softened WAY more than it needs to be, and the axis is rotated so that green is up, rather than blue. Nothing that ā€œbreaksā€ the model, but makes it a little harder to work on.

Hope that helps!

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7

1080Ɨ553 45.1 KB

Make it a group and it does not report solid.
It is a skin.
The top part has no ā€˜volumeā€™ - you should never be able to see the blur-gray back-faces, except when cutting a sectionā€¦
What is the expected form of this part ?
The bottom part has an internal ā€˜floorā€™ which must go too.

A manifold solid must consist of a group or component, containing only faces and edges.
Every edge must support exactly two faces.
So no faceless edges, no edges with just one face around holes or single skin walls, flaps etc, no internal partitions where an edge has three or more facesā€¦
No intersecting forms, which might report as ā€˜solidā€™ but cannot be 3d-printed - intersecting their geometry will destroy the spurious solidity reportā€¦
Also all faces should be looking outwards - no blue-gray back-faces should be visible unless you have cut a sectionā€¦

Some simple PushPulling or FollowMe around a circle-path will make what you want - the PushPull any 'holes for screws etc as needed afterwardsā€¦

It needs more workā€¦:slightly_smiling:

PS: Purge your model [Model Info > Statistics] - it contained 22 unused components and 4 materials.
This simply bloats the file and its 1.2 Mb becomes < 140 kb !

8

Thanks everyone for the help, just made the changes and it printed successfully.