Abstract
The parabolic droplet trajectory in inkjet printing causes errors between actual position and expected positioning, deteriorating printing quality in highspeed printing. To improve printing quality and increase printing speed, an accurate firing time estimation method is proposed to compensate the droplet position error. A speed estimator based on the extended state observer is designed to estimate carriage speed on-line, based on which, the exact firing time for droplet position compensation is calculated. Simulation result shows the effectiveness of carriage velocity estimation, and experimental results show that the printing quality is markedly improved.
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