Hi Denman, and yeah for tire3 like Danny mentioned the issue there is your base tire is not a solid, to get the kind of behavior you would expect from the booleans you want to make that a closed solid instead of an open surface.

Danny showed one way to do that, which is to make your original profile curve to be a closed curve before you revolve it.

That's probably the best way since you probably want your tire to have a kind of slim thickness like that.

Here is another way to show you some other techniques on how to solidify it by building some additional surfaces:


Select this edge:



Run Construct / Extrude. Uncheck the "Cap ends" option, and move your mouse to snap on to the point on the back side, that will extrude out to that distance:



Now select those 2 pieces, and use Edit/Join to glue them together. Now select that joined piece, and use Construct / Planar to turn it into a Solid:



The Construct / Planar command can be used to fill in planar openings in a open object to turn it into a solid.


With your base piece as a solid then the booleans should work a lot more like you would expect - although you can use surfaces in the booleans the typical sense for which pieces are kept and discarded are mostly oriented around volumes, so you probably want to have closed volumes (instead of open surfaces) to get the most sort of "normal" expected results.

- Michael

Thank you very much, manz, Danny and Michael for the helpfull and very fast replys.

This really helped me to understand better how to deal with these kind of bolean operations.
Now I am going to try this all by myself :D

I want to keep participating in this forum so you guys will se me around here. Thanks again.

-Denman

Hi Denman,

I would suggest that you set up a shortcut key to select solids, that way you can check during boolean operations if the model does get broken. It is an habit of mine now, and can save problems as it is easier to check and then make changes if needed.

For the shortcut, go into options/ shortcut keys, and add a key to use and then the script:-

script:moi.geometryDatabase.getObjects().getSolids().setProperty( 'selected', true );


Sorry for my abrupt earlier reply, I was just passing by and just wanted to inform you of the problem,.. I should, on reflection, given you more info.

Regards, and welcome.

- Steve

Hi Steve,
thank you for the suggestion I am definetely going to use a shortcut for that script.

-Denman