Method for operating a printing press

Method according to the preceding claim

• characterized by the fact that
• the measures in the region of the critical frequencies that trigger the undesired vibrations include
• active measures,
• the measures include the deliberate application of second vibrations to compensate for the first vibrations.

Printing machine with a control device (13),

• which has a connection (15) with a measurement device (12) to determine vibration behavior of at least one printing cylinder (3) of the printing machine,
• in which the control device (13) is set up, so that it causes the measurement device (12) before and/or during printing operation to determine the vibration behavior or at least one printing cylinder (3) of the printing machine,
• in which the control device (13) has a connection (15) to a device to avoid or suppress undesired vibrations of the printing cylinder (3) by measures in the range of the critical frequencies that trigger these vibrations,
• in which the control device (13) is set up, so that it drives the device to avoid or suppress undesired vibrations of the printing cylinder (3) during printing operation,
• characterized by
• an excitation device, for deliberate exposure of the system rotor-torque transfer element-printing cylinder (3) of the printing machine to an exciting cylinder of a power output stage (9), with which signal vibrations of the system rotor-torque transfer element-printing cylinder (3) can be produced,
• in which the control device (13) has a connection (15) to the excitation device and is set up, so that it drives the excitation device before and/or during printing operation,
• and in which the measurement device (12) is set up, so that the vibrations of the system rotor-torque transfer element-printing cylinder (3) produced with it are measurable.