STL files resolution

[Anonymous]

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,

[Patchy]

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

[Alfred.NESWADBA · Accepted solution]

Hi,

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

- alfred -

[john.vellek]

Hi @Anonymous,

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

[john.vellek]

Hi @Anonymous,

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

[Anonymous]

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

[Anonymous]

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

[Anonymous]

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!

[Anonymous]

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.

[Alfred.NESWADBA]

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 -

[Anonymous]

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! 

[bandicode017]

thank you very much :d worked like a charm 

[OmniCardoso]

It worked perfectly, thanks!

[jbraaksmaH7TAJ]

Worked like a charm! Thanks!

[maurizioabela]

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