Patent ID: 7448321

Claim:
A drive unit arrangement for use in a web-fed rotary printing press comprising: a plurality of press units in said printing press; a separate drive motor for each one of said plurality of press units, each said separate drive motor adapted to drive its one of said plurality of press units independently; a separate drive regulation unit for each one of said separate drive motors; a higher-order control unit for generating a single master shaft angular position set point of a virtual master shaft for each one of said separate drive motors; at least one first signal line adapted to carry said single master shaft angular position set point to each one of said drive regulation units; means for generating a separate individual offset value for each one of said separate drive motors for each of said plurality of press units, each said separate individual offset value defining a displacement of said angular position set point of each one of said separate drive motors with respect to said single master shaft angular position set point carried to each one of said separate drive motors by said at least one first signal line; and a second signal line adapted to carry said separate individual offset value to each one of said drive regulation units for each one of said separate drive motors.