Homework Help: Isn't the normal acceleration always towards the center?

1. The problem statement, all variables and given/known data
2. Relevant equations

See attachment

3. The attempt at a solution
I solved the problem (on the same page as problem, written in pencil) but the direction of the acceleration that I calculated is different, I dont understand why my answer is wrong if the normal acceleration always towards the center and the tangent acceleration is suppossed to be clockwise.

 

I think I measured from the horizontal, thats why I think my answer is different from the books, see diagram. Thanks!

 

You are absolutely right, drew my acceleration vectors on the right side of the pulley, where there is no conveyor belt, thats why I got confused. Ok, thanks you.