A novel approach for modeling of laser printers is described. Other printer simulations approximate the final result on paper for relatively large printed patterns under typical conditions, many times using experimental input/output data as basis for the simulation. For the phase space simulations we use basic physics principals and model simple printed elements such as few dots or lines. Instead of modeling a large variety of printed patterns to approximate observable results we vary the physical parameters under which the simple printed elements are printed. Thus, we are able to learn the basic behavior of much larger printed structures under common and even uncommon conditions. Using the method it is possible, for example, to understand print stability control or to define requirements and tolerances for printer elements. Moreover, by understanding from basic physical laws the behavior and interactions of these simple print elements we are able to construct large scale printed elements with a-priori knowledge of the expected final results, without resorting to the large scale simulations. The method, which is applied for Liquid EP, is easily transferable to dry toner Xerography.