A device for beam shaping includes a heat dissipation body having an upper side with a planar section and a plurality of laser elements next to one another on the planar section of the upper side that respectively emit a ray bundle having a fast-axis divergence and, perpendicular thereto, a slow-axis divergence. After the operation of the conveyer unit is stopped, the method cleans an image forming unit, and then displays the error occurrence. The crack stop comprises self healing material which, upon propagation of a crack, is structured to seal the crack and prevent further propagation of the crack. The electronic device has a network interface that is operable to receive network packets. Preferably, the wear plates comprise projections that are positioned within adjacent receiving recesses in the center rotor.