topic Re: STL files resolution in AutoCAD Forum

STL files resolution

Anonymous — Thu, 29 Sep 2016 12:28:14 GMT

Hello,

When I export a 3D solid into a stl file, curved surfaces are approximated by several straight faces. I suppose it happens during the conversion. I want to have something smoother so is it possible to change the resolution of the stl file? Is there a command for that?

I use Autocad 2017.

Thank you,

Re: STL files resolution

Patchy — Thu, 29 Sep 2016 12:48:08 GMT

There is no option to tweak stl when export from autocad.

Re: STL files resolution

Alfred.NESWADBA — Thu, 29 Sep 2016 13:02:11 GMT

Hi,

turn FACETRES to 10 (max value, lower it if your file is too large).

- alfred -

Re: STL files resolution

john.vellek — Mon, 03 Oct 2016 14:17:48 GMT

Hi @Anonymous,

How is this issue proceeding? Did you get the answers here that you needed? Please post an update.

Re: STL files resolution

john.vellek — Tue, 04 Oct 2016 19:43:53 GMT

Hi @Anonymous,

Did this get worked out? Here is an AKN Article that describes in more detail, the suggestion offered by @Alfred.NESWADBA

Re: STL files resolution

Anonymous — Mon, 05 Oct 2020 17:38:40 GMT

Gracias, tenía el mismo problema y dudaba si era cosa de AutoCAD o de mis programadas de delaminado 3D. Ahora sé que el fallo era del AutoCAD al exportar a STL y lo he solucionado de manera sencilla y rápida. Muchas gracias

Re: STL files resolution

Anonymous — Thu, 11 Feb 2021 10:55:27 GMT

My faceres was set to 0.5, changing it to 5.0 solved sovled my problem & my 3D print is so much nicer now; I suspect setting it to 10 will make it superb 🙂 ... thanks Alfred

Re: STL files resolution

Anonymous — Sat, 31 Jul 2021 03:49:31 GMT

I'm getting something weird.

Facetres=10

Facetdev=1000

Shape in Autocad

Shape in Chitubox (my slicer)

I've export several items that look normal in the slicer AND printed perfectly fine.

This one clearly has something wrong with it!

Re: STL files resolution

Anonymous — Sat, 31 Jul 2021 14:38:48 GMT

a short follow-up: I sliced the object and exported the 'halves' by stlout.

the 'bottom' half (left, with the hole) looks fine, but the top half (right, upside down) is jagged. same setting and exported seconds apart.

Re: STL files resolution

Alfred.NESWADBA — Sat, 31 Jul 2021 15:40:07 GMT

Hi,

>> Facetdev=1000

Which type of AutoCAD do you have? Because Vanilla AutoCAD does not have this variable.

Even if you have Civil 3D (or any vertical which supports this var) a smaller value creates better curvature, not a bigger value.

>> I sliced the object and exported the 'halves' by stlout

The only reason I could imaging is that the objects are created at high coordinates and after slicing one of the objects reached a limit.

If FACETRES does not create a really round object (which STL can't, because it contains triangles and no real curved objects) you can create better result by scaling the object you have to a bigger object in AutoCAD, then export to STL and later in your slicer scale it back.

But take care, the number of triangles could kill the performance of the slicer, slicing will take much more time then.

- alfred -

Re: STL files resolution

Anonymous — Sun, 01 Aug 2021 17:56:56 GMT

Civil 3D 2020, I've tried high and low values of facetdev with no difference.

Object base was way off near my local state plane coordinates!! How that happened, I have no clue.

Moved everything to 0,0,0 and it fixed itself!

Thank you Alfred!

Re: STL files resolution

bandicode017 — Thu, 11 Aug 2022 20:45:12 GMT

thank you very much :d worked like a charm

Re: STL files resolution

OmniCardoso — Fri, 18 Nov 2022 17:10:38 GMT

It worked perfectly, thanks!

Re: STL files resolution

jbraaksmaH7TAJ — Fri, 16 Dec 2022 17:22:55 GMT

Worked like a charm! Thanks!

Re: STL files resolution

maurizioabela — Tue, 06 Feb 2024 14:06:26 GMT

That solved the issue for me - thank you so much. I was going crazy I could not find a solution anywhere.