A composite fiber is described which comprises a polyester component and a polyamide component bound in a side-by-side or eccentric core-in-sheath structure, exhibiting a percentage of crimp DC of 1. The first and the second rotary compression elements are driven by the electric motor element. A timing control phase lock loop provides precise time synchronization for timing corrections from a global positioning system based time reference. The brush is arranged in a top of the rotating body.