Printing machine and method for starting a printing press

The invention relates to a printing machine, particularly sheet printing press, with at least one main drive, and with at least one printing unit, wherein the or each printing unit at least one transfer cylinder, a rolling on the transfer cylinder form cylinder, an inking device, preferably a dampening system and a the forme cylinder or the transfer cylinder associated with direct drive (6) and rotary encoder (7), wherein in the continuous printing operation over the direct drive (6) of the respective cylinder (1) own motor and in synchronism to the or each driven by the main drive cylinder is driven, wherein the direct drive (6) of the or each printing unit a column (11) and a rotor (12), wherein the stator (11) of the direct drive to a fixed support (14) of the respective printing couple and the rotor (12) of the direct drive (6) to the rotation driven by the same cylinder of the respective printing unit in a defined angular assignment mechanis ch are secured in position. According to the invention, the printing machine is characterized by the following features: a) stator (17) of the rotary encoder (7) is attached to a fixed support (14) of the respective printing couple and a runner (18) of the rotary encoder (7) (in the rotary-driven cylinder 1 ) is mechanically secured in position in any angular assignment; b) the cylinder (1) of the respective printing unit is (for carrier 14) thereof via a position assigning means (22) defining aligned; and c) the encoder ...