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One layer is printed inverted (print air instead of part)


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Posted · One layer is printed inverted (print air instead of part)

Hi,

I have Cura computing layer 106 inverted, It print in the air inside my piece and avoid printing the piece.

 

See attached GIF.

 

In low quality I don't have the pb.

 

Did any one already have this behavior ?

 

I did check in X-ray mode but all is good.

 

Cura 4.13.3 Linux 64bits
Ender 3

 

Peek 26-05-2022 15-45.gif

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    Posted · One layer is printed inverted (print air instead of part)

    Tried your project file on cura 4.13 windows version and it sliced perfectly so not sure whats happening on your end.

     

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    Posted · One layer is printed inverted (print air instead of part)
    On 5/26/2022 at 4:22 PM, obewan said:

    Tried your project file on cura 4.13 windows version and it sliced perfectly so not sure whats happening on your end.

     

    Good to know. Thx

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    Posted · One layer is printed inverted (print air instead of part)

    I tried Cura 5.0.0 and I have the issue at super quality only.

     

    It's gonna be a mystery.

     

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    Posted · One layer is printed inverted (print air instead of part)

    On a lark I opened the model in MS 3D Builder and it reported an error.

    This report is from https://formware.co/OnlineStlRepair.  There were some triangles added but that's it.

    --> 0 Naked edges (?)
    --> 0 Planar holes (?)
    --> 0 Non-planar holes (?)
    --> 0 Non-manifold edges (?)
    --> 0 Inverted faces (?)
    --> 0 Degenerate faces (?)
    --> 0 Duplicate faces (?)
    --> 0 Disjoint shells (?)
    -> Repairing: 100.00%
    ----- Repair completed in 279ms ------
    -> Vertex count changed from 112 to 300 (+188)
    -> Triangle count changed from 220 to 596 (+376)

     

    3D builder before repair

    image.thumb.png.ff6e24cb5273c1fc3a4bc97b893a6e0e.png

     

    And after repair.  You can see where the triangles were added to the flats between the ribs.

    image.thumb.png.2eb84048380f1e10ffd19fd3d94dcc67.png

     

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    Posted · One layer is printed inverted (print air instead of part)
    19 hours ago, GregValiant said:

    On a lark I opened the model in MS 3D Builder and it reported an error.

    This report is from https://formware.co/OnlineStlRepair.  There were some triangles added but that's it.

    --> 0 Naked edges (?)
    --> 0 Planar holes (?)
    --> 0 Non-planar holes (?)
    --> 0 Non-manifold edges (?)
    --> 0 Inverted faces (?)
    --> 0 Degenerate faces (?)
    --> 0 Duplicate faces (?)
    --> 0 Disjoint shells (?)
    -> Repairing: 100.00%
    ----- Repair completed in 279ms ------
    -> Vertex count changed from 112 to 300 (+188)
    -> Triangle count changed from 220 to 596 (+376)

     

    3D builder before repair

    image.thumb.png.ff6e24cb5273c1fc3a4bc97b893a6e0e.png

     

    And after repair.  You can see where the triangles were added to the flats between the ribs.

    image.thumb.png.2eb84048380f1e10ffd19fd3d94dcc67.png

     

    I guess OnlineStlRepair is make a safer 3D model.

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    Posted (edited) · One layer is printed inverted (print air instead of part)

    Fixed STL fixed the issue.

     

    Thank you every one. 👍

     

    (original STL exported from Freecad)

    Edited by nelstaar
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