issue, hole wall printed on just infill no bottom, with pictures

[tomtom001 0]

Hello every one, and of cause my first post is a problem!

So I've been using cura for a while now it's very intuitive i like it, I am also designing my own parts now with freecad and starting with fusion 360.

 The problem however is not only with things I have designed but with everything i slice.  If the object has a hole and then a larger hole outside of it in close proximity as with a surface with a countersunk screw it will slice it so that the outer top hole walls are printed on just infill leaving a small gap.  I presume it should use the last layers of the smaller hole underneath and make a bottom surface for the top hole. 

 This doesn't notice on thick walls but they must be thin for this and many  projects i do,  I tried changing top and bottom layer counts but it seems that cured doesn't recognise it as a different sized hole?

Any help is greatly appreciated thank you, Tom.

[burtoogle 509]

Hi @tomtom001, could you please attach a Cura project file that shows this problem. It's hard to suggest a solution just looking at the images. Thanks.

[tomtom001 0]

Yes of cause, i have added a project and a stl I cut out the rest so hopefully you can see what i mean. Thanks.

CFFFP_test hole cura.3mf

test hole cura.stl

[burtoogle 509]

Thanks for the files. I set the skin removal width to zero and now the skin around the 4 holes on layers 29-32 gets printed. The skin was being removed because it was narrow than the removal threshold. Hope this helps!

 

Edited January 15, 2019 by burtoogle

[tomtom001 0]

That is ace, thank you very much. i was looking in the wrong places for it! also i have found some settings for surface expansion angle so i can reduce the thickness down of the overhangs. thanks again. Tom.