Printhead waveform adjustment

A method comprising:

• correlating, for each of a plurality of printheads, a series of printhead waveforms input to a printhead with a series of optical density values output by the printhead in response to the printhead waveforms, wherein a parameter of the printhead waveforms input to the printhead varies over a range of values for the series of the printhead waveforms;
• determining a single target optical density for the printheads based on an average optical density of the printheads;
• determining, for each of the printheads, a functional relationship between the parameter of the printhead waveforms input to the printhead and the optical density values output by the printhead;
• determining, for each of the printheads, a target printhead waveform parameter for the printhead based on the single target optical density input to an inverse of the functional relationship;
• and
• updating printhead settings to include information of the target printhead waveform parameter determined for each of the printheads for applying to the printheads to output ink at consistent optical density.

A non-transitory computer readable medium embodying programmed instructions which, when executed by a processor, are operable for performing a method comprising:

• correlating, for each of a plurality of printheads, a series of printhead waveforms input to a printhead with a series of optical density values output by the printhead in response to the printhead waveforms, wherein a parameter of the printhead waveforms input to the printhead varies over a range of values for the series of the printhead waveforms;
• determining a single target optical density for each of the printheads based on an average optical density of the printheads;
• determining, for each of the printheads, a functional relationship between the parameter of the printhead waveforms input to the printhead and the optical density values output by the printhead;
• determining, for each of the printheads, a target printhead waveform parameter for the printhead based on the single target optical density input to an inverse of the functional relationship, and
• updating printhead settings to include information of the target printhead waveform parameter determined for each of the printheads for applying to the printheads to output ink at consistent optical density.