NetFabb tells me it has degenerate triangles near each eye, the nose and
the chin. It can remove them if you tell it to, it doesn't by default.

On 25 February 2018 at 16:09, jon jon@jonbondy.com wrote:

the prusa version of sli3r seems to be able to handle it, but I think I
can see the problem areas, either side of the nostrils there are two
holes after slicing, it may help you track down the issue...

On 25/02/18 16:09, jon wrote:

​
2018-02-25 13:34 GMT-03:00 Chris Camacho chris@bedroomcoders.co.uk:

You are right but I don't see how this could be indigestible to any
reasonable slicer.

​

​

Interesting.  When I look at the STL using NetFabb as a viewer, I don't
see holes (which is why I was mystified).  Both IdeaMaker and CraftWare
come up with bizarre slices (IdeaMaker does worse than CraftWare).  Here
is the IdeaMaker slice.  I would like to keep using IdeaMaker, so what I
was looking for was a way to modify/fix the STL.  The fact that I cannot
see the holes in NetFabb makes that difficult to do.

On 2/25/2018 11:34 AM, Chris Camacho wrote:

--
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nor do I receive texts on my main phone number
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If you know that I am home, please email me.

Very cool!

I can see where the slicer got confused.  There is that narrow part, and
with the spiral slicing, it needs to put two beads of filament where
there is barely room for one.  Still, I agree with the other comments
that a good slicer would work around the problem.  The IdeaMaker slicer
is set up to support the Raise3D N2 printer, so switching slicers would
involve a different kind of adventure.  Probably easier to tweak the STL.

Thanks for all of your help, and so quickly!   You guys rock!

Jon

On 2/25/2018 11:44 AM, fred_dot_u wrote:

--
Sent from my desktop computer.
I do not receive emails while away from my desk,
nor do I receive texts on my main phone number
(which is a land line).
If you know that I am on the road, please text me.
If you know that I am home, please email me.

On 25. feb. 2018 17:09, jon wrote:

Hi Jon,

Maybe this helps. I did a quick test and my utility found and fixed some
issues:

download link (2 day expiry)
https://www.expirebox.com/download/0bcbf69f4f408349b2b48b8605957954.html

More details in the log below

abm_polyfix -zip sample.stl

Parameters:
input_file = sample.stl
zip =

polyhedron 0 ================= volume=73528.4, dtol=0.01, atol=1e-06,
maxiter=10
iteration 0: vertices=249000 faces=83000
warning: 7 zero area faces.
warning: nonmanifold edges: uc(1)=249000
merged 207669 vertices
removed 343 collapsed or zero area faces
split 1 face
total changes=208013
no warnings

iteration 1: vertices=41331 faces=82658
merged 4 vertices
removed 8 collapsed or zero area faces
total changes=12
no warnings

iteration 2: vertices=41327 faces=82650
merged 2 vertices
removed 4 collapsed or zero area faces
total changes=6
no warnings

iteration 3: vertices=41325 faces=82646
total changes=0
no warnings

Summary:
polyhedron 0: vertices=41325 faces=82646 : no warnings

Writing: sample_polyfix.zip

... abm_polyfix finished, time used: 0d 00h 00m 05s

Regards
Carsten Arnholm

I don't think Netfab or any other software will be able to repair the
"holes" in your stl because the file represents a watertight model (with
some degenerated triangles). In fact, the holes are model genus like in a
torus or in a perforated cube. To repair it manually is a very hard task
due to the high number of triangles. So, either you regenerate the model
increasing its thickness (in such a way the negative mask doesn't touch the
positive one), or give up using spiral vase.

2018-02-25 13:45 GMT-03:00 jon jon@jonbondy.com: