Media roll management

摘要

A system and method for media roll management.

主权项

1. A printing machine comprising:
a media advancement mechanism coupled to the printing machine; a media roll mounted on the media advancement mechanism; at least one optical sensor coupled to the printing machine and configured to scan a first non-harmonic mark and a second non-harmonic mark on the media roll; a processor coupled to a print controller and a computer readable medium; a media roll management application executable from the print controller or the computer readable medium, wherein the media roll management application is to:
determine a first frequency of the first non-harmonic mark;determine a second frequency of the second non-harmonic mark;identify at least one attribute of the media roll based on the first frequency and the second frequency; andupdate the at least one attribute of the media roll to a look-up table,
wherein the at least one attribute of the media roll includes a length of the media roll, andwherein the length of the media roll is identified by:
determining a first phase of a first mark frequency of the firs non-harmonic mark and a second phase of a second mark frequency of the second non-harmonic mark;determining a first amplitude of the first phase and a second amplitude of the second phase; anddetermining an absolute amplitude of the media roll by combininig the first amplitude with the second amplitude.