Method of controlling inkjet printing

Inkjet printing apparatus comprising:

• i) an inkjet printhead for firing at least one fluid drop;
• ii) at least one processor;
• and
• iii) at least one memory including computer program instructions;
• the at least one memory and the computer program instructions being configured to, with the at least one processor, cause the inkjet printing apparatus to perform a method of controlling inkjet printing including:
• a) firing at least one fluid drop from the inkjet printhead at one or more firing frequencies;
• b) measuring a parameter of said fired at least one fluid drop for determining a present firing performance of the inkjet printhead at each of the one or more firing frequencies;
• c) determining if the present firing performance at any of the one or more firing frequencies is different from a predetermined firing performance;
• and
• d) changing, in accordance with a difference between the present firing performance and the predetermined firing performance, and for at least one of said one or more firing frequencies, a fluid quantity parameter for subsequent fluid drops to be fired by the printhead.

A computer program product comprising a non-transitory computer-readable storage medium having computer readable instructions stored thereon, the computer readable instructions being executable by a computerized device to cause the computerized device to perform a method for controlling inkjet printing, the method comprising:

• a) firing at least one fluid drop from an inkjet printhead at one or more firing frequencies;
• b) measuring a parameter of said fired at least one fluid drop for determining a present firing performance of the inkjet printhead at each of the one or more firing frequencies;
• c) determining if the present firing performance at any of the one or more firing frequencies is different from a predetermined firing performance;
• and
• d) changing, in accordance with a difference between the present firing performance and the predetermined firing performance, and for at least one of said one or more firing frequencies, a fluid quantity parameter for subsequent fluid drops to be fired by the printhead.