Hello
I need a rotating cube in a loop. The cube has to rortate around his center (no floating or moving). Whe I am using the animation wizzard (Vue 6 Infinite) and spin the cube around the Z-axis the spin is fine but the cube is always moving. What's the easiest way to solve this "problem"?

Why don't you just rotate the cube in side or front view at a non zero time on z axis by using the gizmos? I would move it twice: once at the middle of the animation length, and once at the end. Without the wizard.

Thanks for your advice. What's a gizmo?

Do you use Vue6? In Vue 6 you have new manipulators called gizmos to rotate, resize and move objects in the viewports, and the option to do these operations globally ( world space) or locally ( object space).
If you use Vue5, you can use the numerics tab to rotate your cube accurately.