Patent ID: 11872811
Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A method to manage printhead operational life; the method comprising
firing at least one nozzle of a printhead according to an associated firing parameter to produce a respective drop of print liquid,
measuring a characteristic associated with the drop of print liquid, and
adjusting the firing parameter in response to the measuring to vary the measured characteristic associated with the drop of print liquid on a subsequent firing while maintaining the firing parameter at or above at least one predetermined parameter limit, the firing parameter adjusted to adjust an OverEnergy value that simultaneously satisfies a predetermined drop trajectory error and a predetermined kogation error, the predetermined drop trajectory error corresponding to a first range of failure levels and the predetermined kogation error corresponding to a second range of failure levels different from the first range of failure levels, the first failure level and the second failure level falling within a known pen operating range that lies within a predetermined operating range of a class of pens.