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floor missing, slicing issue also near wall


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Posted · floor missing, slicing issue also near wall

I have seen topics similar to this.

Before, when using Cura 4.08 I had the same problem with a linear wall. I upgraded to 4.10 and is was gone. But now, with 4.10, I have the same issue with a curved wall; there is no foundation under it. I saw the problem in het print result, came back to Cura and found the issue. I then made a new stl file using a different tool from a step. Both .stl s  show the same problem. Picture err1_ss shows a screenshot from Cura with the orange inside showing between the top and middle concentric holes. And that is also what is printed.

Any idea?

The screenshot:


is made from the stl file:


Thanks for any help



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    Posted · floor missing, slicing issue also near wall
    25 minutes ago, obewan said:

    playing about with line width and number of lines almost sorts it.

    Using the cura arachne engine completely sorts it.


    Thanks for the prompt reply. However; could you give me some pointers what "number of lines" you have been playing with? Wall thickness? Set to what?

    And, similarly; how to start the "arachne engine"? Should I select something? Although I use an UMO I am still pretty much using the standard settings. I am not that adventurous. 😉 

    Finally; would you agree that this is an imperfection in Cura? I think it should be so that under the whole 0,6mm of wall there should be a floor, level with the top of the middle hole, exactly how it IS done between the lower and middle ring. Why does it sometimes work okay, and sometimes not. That seems a bug or hidden feature at least.


    Thanks for some pointers.



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