Rhino to Stl

kagebrand · May 17, 2020, 9:03am

I have a closedpolysurface model, but when I export it to stl, the quality turns out really bad.
Does anyone know what I am doing wrong?
I changed it into a Mesh and checked it, what came up was that It had 2680 extremly short edges. Could that be the issue here?

Thanks
Helena

gankeyu · May 17, 2020, 9:26am

Please upload your file, if possible.

kagebrand · May 17, 2020, 9:38am

Skålen23_17 (2).3dm (2.0 MB)

kagebrand · May 17, 2020, 10:12am

Hi. Thank you for trying to help me out,

Willem · May 17, 2020, 10:25am

Hi Helena,

What happens if you use simple controls for the meshing and choose highest quality?

What strikes me as odd is 10 for max distance to srf

Does this help?

cadmaster · May 17, 2020, 10:39am

The object seems unnecessary complex. MergeAllFaces to the rescue.

kagebrand · May 17, 2020, 10:55am

Hi Willem. I have tried that, still the same result.

kagebrand · May 17, 2020, 10:58am

Hi Cadmaster. I tried MergeAllFaces but still the same result

kagebrand · May 17, 2020, 11:01am

1435 extremely short edges. Could this be the problem? And how do i fix that?

Willem · May 17, 2020, 12:14pm

Hi Helena,

I had a quick look at your file and the issus you have a due to the object being very far from the world origin:

If you move it close to world 0,0,0 you will avoid these errors caused by floating point rounding errors.

Does this make sense?

_Willem

gankeyu · May 17, 2020, 12:18pm

It looks pretty good after moving the object around the origin point.
Your CPlane is too far away from origin and causes weird floating error.

kagebrand · May 17, 2020, 1:25pm

Thank you Willem. I did for sure make it better:-)
Still some quality issues though, but that could be the settings.

kagebrand · May 17, 2020, 1:28pm

Thank you Gankeyu. It worked:-) i did move the object to 0, i took move and then move object to 0. And it worked better,( i did scale the object as well) see image i sent to willem- But it still suffers from triangulated surfaces/ low poly. What kind of settings did you use when exporting/ mesh to get such a nice smooth surface on the stl?

gankeyu · May 17, 2020, 2:04pm

It’s probably depending on what software you are using to process the mesh.

Skålen23_17 (2).3dm (1.5 MB)

kagebrand · May 17, 2020, 2:17pm

Thank you SO much. Your model looked fabolous when i Exported it to STL. I must have done something wrong when i moved it to 0. Do you mind showing me how you moved to 0?

kagebrand · May 17, 2020, 2:17pm

gankeyu · May 17, 2020, 2:36pm

I did the following things:

Move everything around the origin
BooleanUnion
MergeAllFaces & MergeAllEdges
Mesh, using the finest option
AddNgonsToMesh
Export to STL using default settings.

btw some software has issues with negative coordinates, it seems not the case in your example but still worth noticing.

kagebrand · May 17, 2020, 2:42pm

Absolutely Brilliant- I have never used AddNgons toMesh command. Thats sounds interesting. I will have a look into that one. Thank you very much again:-)