Printing machine and method of operating the machine to avoid undesired vibrations

A printing machine comprising:

• a control device,
• which has a connection with a measurement device to determine vibration behavior of at least one printing cylinder of the printing machine,
• the control device being configured to cause the measurement device before and/or during printing operation to determine the vibration behavior of at least one printing cylinder of the printing machine,
• the control device having a connection to a device to avoid or suppress undesired vibrations of the printing cylinder by utilizing measures in a range of critical frequencies that trigger the vibrations,
• the control device being configure to drive the device to avoid or suppress the undesired vibrations of the printing cylinder during printing operation;
• an excitation device, for deliberate exposure of a system rotor-torque transfer element associated with the printing cylinder of the printing machine to an exciting signal of a power output stage, with which signal vibrations of the system rotor-torque transfer element are produced;
• and
• a filter for avoiding the determined critical frequencies,
• the control device having a connection to the excitation device and being configured so that the control device drives the excitation device before and/or during printing operation,
• with the measurement device being configured so that the vibrations of the system rotor-torque transfer element are measurable, and
• with signals that control power electronic components of the power output stage being already filtered with the filter.