Yes, as emkay said, smart drop would work fine.

Chris

Vanilla "Solid Inspector" [NOT 2] indicates the issues.
"Solid Inspector 2" will fix many issues, but you will need to fix some yourself manually.

At the expense of "boiling these cabbages more than once" [Irish saying]... I'll reiterate what a 'Solid' is...

A Manifold Solid [at least as far as SketchUp is concerned] has the following properties:-

It is a "Container" [i.e. a Group or Component-instance].
If you Select it and the 'Entity Info' top-bar says 'Solid' then it is a 'Solid' [BUT subject to the provisos at the end...]
It must contain only Geometry.
Geometry is defined as Edges and Faces [Curves/Arcs/Circles are made from Edges, Surfaces are made from Faces].
Although the non-interacting Guide-lines and Guide-points are also "allowed" [and probably would not affect an export to STL or similar], I'd still recommend you avoid including them.

So the 'exclusion' list includes nested Groups or Component-instances, Text, Dims etc...
[You example does contain some nested parts in the microphone]
There are further limitations on its 'Geometry'.
Every Edge must support two Faces - no fewer and no more.
This means that an Edge CANNOT:
be 'faceless'
have only one face - e.g. forming a ledge, shelf, hole-perimeter etc
be shared by more that two faces - e.g. supporting an internal partition face where it has three or more faces, or a shared edge between to volumes which would otherwise be considered a solid but they'd have four faces

There are 'CleanUp' plugins to remove coplanar or stray-edges etc.
You can use Xray mode and temporary Section-cuts to access the inside of these forms to tidy them up by Deleting unwanted edges/faces.

There are some other issues which might affect 'Solidity'...
The Faces of a Solid should be consistently oriented.
Use Monochrome mode...
Front-faces [Style-dependent, but usually off-white] to the outside, and back-faces [Style-dependent, but usually blue-gray] to the inside.
Once you have a Solid, then the Context-menu > Orient will fix this.

You can still have a SketchUp 'Solid' Container reported, which is not 3d-printable ! 😮
If its Geometry defines a 3d object that cannot exist in the real world it'll fail !
An form like this 'intersects' itself - like a magician who reaches through a solid wall to touch something on the other side.
To treble-check for this, you can take a Container and edit it, Select All and Context-menu > Intersect with Context.
If you exit the Edit and it's still a Solid in Entity Info all is OK.
If it is not then something was wrongs and you need to fix it, as outlined earlier...

@jim4366 said:

Very good, thank you so much. I run into this exact situation all the time converting imported .stl files. Circles usually come in broken with hundreds of segments. Now hoping it's not too much to ask, but would it be possible that, having the center point, could those segments that made up the circle be deleted and replaced with a real sketchup circle? In one swoop? Just a standard 24 segment circle would be fine. A circle un-exploder? 😄

Modified code

m=Sketchup.active_model;e=m.entities;s=m.selection;s.grep(Sketchup;;Face).each{|f|p=f.bounds.center;e.add_cpoint(p);n=f.normal;r=p.distance(f.vertices[0].position);e.erase_entities(f.edges);e.add_circle(p,n,r)}

Or,copy attached plugin to Plugins folder. You will need to supply your own icons for the toolbar created.

Remake Circle.rb

Great advice TIG bookmarked

I just redrew it from scratch next to yours. I used your version for dimensions and then deleted it after mine was finished.

As for what is reasonable, that depends upon the application. If this is to be used in a model of a bed to show how the rails are attached to the posts, mine is overkill, too. If you are making a dimensioned drawing so a machinist can make them, it is probably about right. Even for 3D printing mine will probably be more than adequate. You could figure the resolution (diameter) of the nozzle for for printer and make the segment length at least that long but longer won't be a problem.

Your version of the "hole" has 512 sides. That's less than 1° between vertices. Even 360 sides would be too many for nearly every application. I used 96 sides and I think it is round enough to get the point across.

Hi Rev, superglue and hot glue are commonly used to attach 3D printed parts together. For some novel ways including friction welding the parts together, you may check out this piece on Makezine.

Regarding the long skinny triangles, I wouldn't worry about them unless you are experiencing trouble while printing. While they aren't ideal, I've never personally had trouble printing them. That said, increasing the polycount while exporting is likely the best way to avoid the long triangles, but then you can run into overly heavy models that take longer to process and can also make for a lower quality print.

Thanks. In retrospects it was a bit of a silly question, sorry.

ps that looks sweet!

@ely862me said:

This kind of CNC. Took me a while to build and it is still far from complete.
The Z axis travel should be over 350mm, X is 1750mm and Y is 1100mm.
These are my first real attempts. Some models done for my sister in law - she's a kindergarten teacher. And a stepper motor cover done in foam- just for testing the code.
Sorry to somehow hijacking the thread.

No I invited the thread jack. That is a very badass CNC btw.

Here are some pics of the final product. Definitely room for improvement but overall it came out very well, client happy etc.. Thank you for all the help guys, It really was invaluable!

IMG_0248.JPG

IMG_0246.JPG

I PM-ed a file

Thank you I appreciate the response guys, both were very helpful. Cheers!