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Our illustration shows a nozzle layout with 2 head blocks arranged exactly next to each other in the direction of head travel. One head block contains 2 rows of nozzles each, which are equipped with the same color and are arranged offset from each other by half a nozzle distance.
As a result, each row of droplets to be applied in the direction of head travel can be built up by 2 nozzles.
The two adjacent head blocks can cooperate in different ways. For example, two nozzles positioned at the same height could simply shoot droplets alternately. This would halve the effective firing rate of each row and thus create more operational reliability or allow a higher rate of movement.
Another possibility is that two cooperating nozzles could randomly and alternately process a row of pixels to avoid the banding effect. It is also conceivable that only one of the head blocks is operated at any one time, in order to be able to continue production immediately with the other in the event of a failure.
In order to achieve the same job sequence in both directions of movement, the individual rows of nozzles were loaded with ink in a mirrored arrangement, starting from the center of the head blocks.
The printing resolution of such an arrangement can be flexibly adjusted in the head running direction and can be an integral multiple of the basic resolution resulting from the nozzle arrangement in the material running direction.
The arrangement has the disadvantage that both head blocks must be moved over the entire printing width for each printing movement.