Inkjet printing method

Abstract

A printing system for printing images formed of pixels on a substrate, the system comprising a print system arranged where printheads traverse a substrate, the print system arranged to receive a sequence of print actuation requests in order to print each pixel of an image upon the substrate, the print system having an acceptable rate for the sequence of print actuation requests, the system configured whereby if presented with an actuation period of less than the minimum actuation period then the presented rate of print actuation requests is adjusted by altering the actuation event and / or the discarding of stripe data, to minimise print defects.

Description

technical field [0001] This application relates to inkjet printing and, in particular, to the relative speed of the printhead and substrate during operation of the printer such that the necessary drive cycle to maintain the desired spacing between printed pixels (pixel pitch) is shorter than that of the printhead or printing system Optimum print quality is maintained with the shortest drive cycle indicated by the timing of received drive requests. Background technique [0002] Existing inkjet printheads typically consist of an array of individually switched nozzles, each nozzle including a driver. When the actuator is driven, the nozzle ejects ink. These drivers are driven by an electronic drive circuit that provides the voltage waveform or common drive signal (drive event) used to cause the ink to eject from the nozzle. In many applications, the electronic drive circuit provides a common drive signal to multiple nozzles, while a separate or integrated controller provides ...

AI Technical Summary

Problems solved by technology

However, this object cannot be achieved due to the limitation of the shortest drive cycle of the inkjet print head or the shortest drive cycle of the electronic drive circuit.

This overdrive is usually caused by variations or inaccuracies in the print speed control, making the relative speed between the printhead and the substrate too fast, however, for example, if the operator sets the travel speed too high, due to sensor Operating errors such as oscillations caused by shaking or artifacts in the encoder process can also lead to overdrive, which means that the printing system is being asked to drive too fast

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