How can I make a conveyor belt FBX that spins without rigging? I tried rigging, doesnt work. I tried exporting it with curve unapplied, doesnt work. What WILL work? I am grappling for help right now, Ive looked at everything. Please help me, I need help.

I have a conveyor belt with a curve modifier unapplied. I move a cube and the tracks roll. the object doesnt actually move. I have tried rigging it with bones because i thought there was no other answer and spent 3 days on tutorials and 8 days total on this issue. I import it to unity, and it suddenly isnt rolling, but translating. It just moves, because the curve rolls in blender when i move it, but in unity it just moves the whole thing. I need help.
If you want to make the belt "spin" without any rigging, I'd suggest animating the texture offset of the material applied to only the belt inside of Unity. 
This will give the illusion of the belt "spinnig"
http://docs.unity3d.com/ScriptReference/Material.SetTextureOffset.html

Just increase the x or y offset every frame in 

void Update ()


And make sure to multiply the increment by Time.deltaTime so the speed is consistent across all framerates