Solid tools - Why is this not a solid object?

[spawn]

Hi everybody.

I don’t understand why this is not considered a solid object. Some piece of advice?

solidtools.skp (141.9 KB)

Thanks in advance.

[Shep]

Both groups have a stray edge.

[spawn]

Woops. how did you realized?
I mean, I found what you mean, and you’re right.
Is there any trick to find those mistakes or just zooming in and exploring?

[Shep]

Solid inspector 2

[spawn]

Great! thank you so much.

[Shep]

Take a look at the progression in the model below. See if you think it makes sense.

Shep

solidtools shep.skp (247.4 KB)

[spawn]

Sorry, I didn’t get the point.
What do you mean? that I only need to draw a quarter part of the model?

[Shep]

Correct.

[Shep]

You could even try this way.

solidtools shep 2.skp (351.0 KB)

[spawn]

You’re right, thank you for the recommendation.

I’ve seen several tutorials and they all address me to draw the only neccesary part, that can be applied on all shapes and draws with some symmetry.

I was doing this exercise (the tutorial is for AutoCAD).

Ejercicio desarrollado 12 - AutoCAD Básico

I downloaded the initial picture and I tried to draw it by myself with SketchUP.

Then, when I got some doubts as for example the arc on the bottom side, I took a look at how he did it on AutoCAD, and yes, he only draw one half.
For the arc on the bottom I used the three point arc (I thought it was an useless tool so far).

This is my result.

My .skp EjerBas12.skp (35.2 KB)

And then I thought, let’s make it 3D and I ended up with this “object”.

[spawn]

The last one you did is better