How to get rid of "object with no extrusion in first layer"?
I created fractal Menger sponge with JSCAD and wanted to 3Dprint.
But there were many edges with 90° overhang.
So I rotated by 45° and used brim, and printing started without issues.
After a while I saw in scene camera that still many edges have 90° overhang and stopped the print:
Next I rotatet in two directions with one corner south and opposite corner north.
Now all edges have 45° slope and can be printed without support.
But Prusa slicer reports the title error:
What can I do in Prusa Slicer to overcome this error?
You can use this Menger sponge model JSCAD share link to save as .stl from your browser and slice.
Default n=2 is good, n=3 works as well, but selecting n=4 is slow because 20^n cubes are created.
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RE: How to get rid of "object with no extrusion in first layer"?
Check your settings. You have everything coming to that single point, check you don't have any elephants foot compensation, that reduces the perimeters on the first layer to combat the necessary squish for bed adhesion but for these use cases it can reduce it to zero.
Also you will want to paint at least a little support around that corner otherwise there wont be enough to stop it toppling over.
Something like this-
(from a previous example in a different thread)
For further help you would need to post your prusa slicer project file here. A PS .3mf contains not only the model but also all the settings from your in use profiles and placement etc. Issues like this need more than the model to debug as the settings used are just as if not more important.
If you do attach a project then you MUST zip it up or the forum will silently reject the file as the allowed file types is very small and 3mf is not one of them.
RE:
Thanks for the information.
I recently did my first 3Dprint with setting "forced support only" (and organic).
So I know how to do that.
In the meantime I just added a small cylinder at model base.
Height 1mm was too low and produced a mess.
Now with 3mm height it seems to work, here nozzle camera view:
So using the Menger sponge like a globe after 3Dprint, a base is OK.
Your limited support addition is better if really wanting the unmodified sponge.
(I was surprised how easy it was to remove all the organic support from the big model shown first)