Patent ID: 6736475
Filing Date: 2004-05-18
Classification: B41J

Abstract:
A method of printing onto a rotating media, comprising:determining a reference angular position of the rotating media; determining a current angular position of the rotating media based on timing information that is present within the rotating media, the timing information is selected from the group consisting of a plurality of pulses from a native wobble signal of the rotating media and a data-code signal associated with a data track of the rotating media, wherein the current angular position is determined relative to the reference angular position on the rotating media and accomplished by: obtaining a rotary index signal from a recording device which is rotating the rotating media, the rotary index signal comprising one or more pulses generated at predefined angular positions within each revolution of the rotating media, wherein each revolution is divided into a predetermined number of angular positions; determining a count of the pulses of the timing information between each pair of adjacent angular positions based on the rotary index signal and the predetermined number of angular positions, wherein the operation of determining the reference angular position is based on the rotary index signal; issuing an angular position pulse for each count of the pulses of the timing information; counting the angular position pulses to determine a current count of angular positions; resetting the current count of angular position pulses at the reference angular position so that the current count of the angular position pulses is relative to a reference angular position; and defining the current angular position as the current count of the angular position pulses; and using the current angular position to accurately print an image onto the rotating media.