Apparatus and method for determining suitable printing conditions for printing sheets in a printing system

An apparatus for determining suitable operating conditions for printing sheets in a printing system, comprising:

• a sheet input module for introducing at least one sheet into a printing system, wherein the printing system is arranged for exposing the at least sheet to at least one physical operating condition of the printing system at least one predetermined level;
• a sensing unit comprising at least one first sensor device for sensing a surface geometry of a surface of the at least one sheet and for generating data representing of the surface geometry of the surface of the at least one sheet for the at least one predetermined level of the at least one physical operating condition;
• a processor device for comparing the data representing a height map of the surface of the at least one exposed sheet for the at least one predetermined level of the at least one physical operating condition to a reference to determine suitable operating conditions of the printing system;
• and
• a controller device for selecting the at least one physical operating condition of the printing system to the determined suitable operating conditions of the printing system.