@slawek0805 said:

Who is convexhull?

excuse me, I think that's just as animation. perhaps as convexhull. would have liked to help

screw works! but why the screw is longer then 100m? therefore, the rotation is so slow. or you mean something else?
Do you mean something.see hidden objects and joints.

another screw

logical control with ontouch () script. script in red and green button and in hidden-object. Start with UP-DOWN.

Elevator (ontouch)

@unknownuser said:

Here are all of the versions put into one model, pick your flavor.

Please upload in sketchup (SketchyPhysics) google 3d warehouse

Hallo, ich habe mit Twilight die für mich besten Ergebnisse erzielt. Ich arbeite viel mit Sketchyphysics und kenne keinen anderen Renderer der da so problemlos mitspielt.

my english is not so good. but I think what you mean. make a group with a frame and a hinge. connect the other hinge with the group and connect the hinge in the group with the frame. puuuuh, hope u understand...frame and servo solution

thanks for the plugin midpoints!

I have read the story with the google translator English-German. that's just fine, probably better than the original. Thanks