Patent ID: 8328315

Claim:
A printing system comprising: at least one marking station arranged along a portion of a web path; a first roller in the web path, the first roller being configured to move a web of media along the portion of the web path along which the at least one marking station is arranged; a second roller in the web path, the second roller being configured to move the web of media along the portion of the web path along which the at least one marking station is arranged; a first encoder mounted proximate the first roller and configured to generate an angular velocity signal corresponding to rotation of the first roller; a second encoder mounted proximate the second roller and configured to generate an angular velocity signal corresponding to rotation of the second roller; a first converter operatively connected to the first encoder and configured to generate a first linear velocity signal corresponding to a velocity for a web moving along the web path at the first roller; a second converter operatively connected to the second encoder and configured to generate a second linear velocity signal corresponding to a velocity for a web moving along the web path at the second roller; a low pass filter operatively connected to the first converter to identify a low frequency component of the first linear velocity; a high pass filter operatively connected to the first converter to identify a high frequency component of the first linear velocity; a high pass filter operatively connected to the second converter to identify a high frequency component of the second linear velocity; a first adder configured to compute a first filtered linear velocity at the first roller with reference to the high frequency component of the first linear velocity and the low frequency component of the first linear velocity; a second adder configured to compute a second filtered linear velocity at the second roller with reference to the low frequency component of the first linear velocity and the high frequency component of the second linear velocity; and a controller operatively connected to the at least one marking station, the first adder, the second adder, the first converter, and the second converter to operate the at least one marking station with reference to a registration control mode, the controller being configured to compute a linear velocity for the web with reference to the linear velocity signal generated by only one of the first converter and the second converter in response to a first registration control mode being active and to compute the linear velocity of the web with reference to the first filtered linear velocity and the second filtered linear velocity in response to a second registration control mode being active.