Hello,
Have you checked face orientation before exporting ? Switch your face style to monochrome and reverse any blue face you see
Also, in 3d printing matter, your model should be a solid. While selected, see in the entity info panel if it is reported as a solid
Actually the question is what are you expecting to see? The stl you attached and I modified may not be what you want or be the problem. You should attach the .skp file so we can see what you are working with.
Your latest model has a bunch of internal faces which will prevent it from being printable until you clean it up. It shows evidence that you laid out all of the features in 2D before making it 3D.
I think you would find things a whole lot easier if you start thinking in 3D as soon as possible. Wait to outline the features until you get to them. Imagine how the printer would print this thing if you have it in the same orientation.
Also keep your models closer to the origin. That helps prevent some weird graphics issues.
Here’s a quick example of modeling your component.
Draw the outline of the bottom face.
Extrude to thickness of the lower part. Then outline the relief on the inside.
Extrude to the height of the bottom of the groove. Outline the sides of the groove.
Pull the faces up to leave the groove and create a component (or group). Immediately, without any clean up required, the thing is solid and ready for the .stl export and 3D printing.
An alternative that would work in your model is to extrude the thing to the full height before drawing in the details on the top and then pushing the appropriate faces down.
OMG, Thank you so much DaveR!
From your replies, I realised that I’ve been going about the 3D modelling aspect of this project completely wrong.
I’ll redo it (for the 3rd time omg) again once I have time.