DWG issue with naked edges

Rhino Rhino for Windows
1

Hi,

see CP_DWG_issue.
CP_DWG_issue.3dm (153.2 KB)

Simple model, no naked edges.
Units = centimeters, tolerance 0.01.
All good.

Now I export as DWG 2004 solids (must be DWG).
'test.dwg"
test.dwg (46.2 KB)

Then I start a new model, centimeters, large.
This are the same tolerance settings then.

I import the DWG file.
And see some naked edges which should be not there.

What is the cause?
And how to export ‘better’.

-C-H-A-R-L-E-S-

2

Hi Charles - I see that - thanks.

(Fixed in the V6 WIP)

-Pascal

3

Thanks Pascal.

The customer uses V5.
Any workaround for this issue?

4

Hi Charles - in this particular case the quickest is to remove that flat side adjacent to the naked edge and Cap the object to close it off. I don’t know if this is a more general problem though and needs a different workaround.

-Pascal

5

Not possible:
The shown example is very simplified.
In the real world it is factor 10000 this edges.

Q:
What is the reason?
Is the export bad or is it the import?
(I hope the import - I have no other program to test with.)

6

Well, after more testing, it looks like it is the reading part - that is, a V6 export, imported to a cm, .01 file in V5 has the same naked edge as from the V5 export, but v6 imports it’s own export in a .01 cm file, as well as the V5 export, just fine.

-Pascal

7

I don’t understand the problem. Why are you exporting to dwg then bringing the model back into Rhino? When I open your dwg file in AutoCAD and run an stl check, it says the model is watertight. What are you using the dwg file for?

Thanks,
Dennis

8

To test the export, nothing else.