Controlling the timing of printhead nozzle firing

A printhead including nozzle rows, successive rows of nozzles defining respective ink channels including:

• respective channel shift registers in which to receive print data;
• nozzle enable bits provided one per nozzle at which to receive the print data from respective channel shift registers;
• and
• separate timing generators in each channel to effect nozzle firing in respective channels in time independent manner wherein the nozzles in respective channels are similarly grouped and groups are fired successively such that respective rows of nozzles are organized in repeated pods of nozzles along the length of each row of nozzles, the nozzles in a pod being fired one after the other along the row;
• successive pods of respective channels are linked as a chromapod wherein the one after the other firing of nozzles in each channel is in step along the row of nozzles in the respective pods;
• and firing of the nozzles is controlled by setting the firing pattern of the chromapods.

A printer having a printhead including nozzle rows, successive rows of nozzles defining respective ink channels including:

• respective channel shift registers in which to receive print data;
• nozzle enable bits provided one per nozzle at which to receive the print data from respective channel shift registers;
• and
• separate timing generators in each channel to effect nozzle firing in respective channels in time independent manner wherein respective rows of nozzles are organized in repeated pods of nozzles along the length of each row of nozzles, the nozzles in a pod being fired one after the other along the row;
• successive pods of respective channels are linked as a chromapod wherein the one after the other firing of nozzles in each channel is in step along the rows of nozzles in the respective pods;
• and firing of the nozzles is controlled by setting the firing pattern of the chromapods.