[Support inside the printed element]

@geert_2
Thanks for the suggestion on let the parts overlap when making a union. 
Yes the part is made by a union of a rod and a spiral, and in fact i had some problems in making a union of them in the beginning, and I solved it by let them overlap as you suggested. After that i could make a union of them without any errors, and then I thought the problem was solved.
But apparently it was not :-/


@kmanstudios
Thanks for the link to the validating tool, I will use this tool to try to find the reason for the error that I am seeing.
I think that I am doing something wrong, rather then there are an error in freecad. 

[Support inside the printed element]

Thanks for the feedback.
I am not using Sketchup, but I am using freecad to make the 3D models in. 
But now I at least know where the root cause of the problem is.
Can any of you recommend a tool to validate the stl files with?
Thanks in advance

[Support inside the printed element]

Hi Cura.

I have been using Cura slicing software for a couple of years now are very satisfied with the results. 

However yesterday i tried to printing a auger with two different increases, and half of it looked fine but the other half was very fragile.
When i looked at the layers inside the slicer i spotted that on some layers the support was inside the printed element.

Can somebody tell me what I have configured wrong in my configuration to end up with this result?
Thanks in advance
 

FTFT5_Snegl.3mf