a bit off topic: detecting where support is needed

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a bit off topic: detecting where support is needed

jon_bondy
I have started printing objects using a transparent filament and spiral
mode, where the entire print uses one long spiraling extrusion. 
Vertical surfaces print perfectly, but as the surfaces tend towards the
horizontal (overhangs) they fail to print correctly.  This is further
complicated by the fact that, since the objects are hollow, a top
surface which would normally not be considered an overhang becomes one.

I would like a way to create an object and immediately see the areas
that will not print properly; at the moment, I just print and pray.  I
recall some slicer that would highlight overhangs in color, but have
been unable to find it on the half dozen slicers that I have here at the
moment.  Maybe it was the slicer for the Form 2 that I had for a while.

Any thoughts about how to visually flag surfaces that could be a
printing challenge?

Thanks.  This is such an active group, and has so many experienced
people, that I thought I would have more success here than in other forums.

Jon

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Re: a bit off topic: detecting where support is needed

NateTG
Support is generally incompatible with spiral vase mode.

Slic3r has support only where needed which doesn't highlight, but it should
show up in the layers.

In terms of OpenSCAD, automated analysis of the geometry isn't that hard,
but you need to have computational access to it (i.e. some kind of render()
function or something like functional openscad)  and you'd need to indicate
where the print platform is.




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Re: a bit off topic: detecting where support is needed

jon_bondy
Sorry if I was unclear.  I don't want to generate support for the spiral
prints.  I want to see the parts of the object that are in jeopardy of
printing incorrectly, by having a slicer tell me where it thinks I need
support.  I can then redesign the object to minimize those areas.  And I
was not expecting OpenSCAD to do this for me.

Seems like the Craftware slicer may have all of the features I was
looking for.

Jon


On 2/22/2018 11:35 AM, NateTG wrote:

> Support is generally incompatible with spiral vase mode.
>
> Slic3r has support only where needed which doesn't highlight, but it should
> show up in the layers.
>
> In terms of OpenSCAD, automated analysis of the geometry isn't that hard,
> but you need to have computational access to it (i.e. some kind of render()
> function or something like functional openscad)  and you'd need to indicate
> where the print platform is.
>
>
>
>
> --
> Sent from: http://forum.openscad.org/
>
> _______________________________________________
> OpenSCAD mailing list
> [hidden email]
> http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org
>
>

--
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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.


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