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a missing surface


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Posted · a missing surface

Hi:

I have a problem that my model (prepared by sketchup) looks correct but the Cura Layer view always ignores one of the surfaces inside a tube. I got a walk-around solution but wonder what causes the problem.

test2.stl: https://gofile.me/21ohr/lfoA62eU is the model I would like to print. The "Normal" view shows the model correctly but a surface in the "Layer" view is missing. Therefore, the model cannot be printed correctly.

 

I try a simpler model

test1.stl:

https://gofile.me/21ohr/G2QBJbY7

 

where the outer tube is removed and everything looks correct (in both Normal view and Layer view)

 

Any idea what went wrong?

 

The two sketchup files (ver. 14.0.49) are here.

test2.skp: https://gofile.me/21ohr/p2CiipI5

test1.skp: https://gofile.me/21ohr/4rlI7tHE

 

BTW, I tried all kinds of combinations in "Fix Horrible" and they do not work.

 

Thanks

 

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    • 2 weeks later...
    Posted · a missing surface

    Sorry I didn't see this post before! Did you fix the problem? None of your download links work anymore. Please use hosting services that last for decades and not weeks.

    Look at the part in Cura in "XRAY" view. If you seen anything red then it needs to be fixed. Colors are determined by passing a line through all the polygons. If the line intersects an even number of surfaces the color is a shade of blue or white. If odd it is a shade of red. Odd intersections implies hole in a surface or an extra surface.

     

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