Inkjet Nozzle Array Position Adjustment via Discharge Timing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Inkjet recording apparatuses face challenges in maintaining accurate dot placement across the scanning range due to carriage posture variations, leading to deviations in the conveyance direction, which existing methods struggle to correct uniformly across multiple nozzle arrays.
Innovation Solution
An inkjet recording apparatus with an acquisition unit to measure deviations, a determination unit to compare these deviations with threshold values, and a setting unit to prioritize adjustment values for nozzle arrays exceeding the threshold, ensuring consistent impact position adjustments throughout the scanning range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If adjustment values are set for each nozzle array to correct impact position deviations, then recording position accuracy is improved, but device complexity increases due to multiple adjustment parameters
Solution Approach 1:
The patent applies parameter changes by adjusting the discharge timing of ink droplets from different nozzle arrays. By modifying the timing parameters (discharge timing offsets) for each nozzle array based on measured impact position deviations, the system corrects recording position accuracy without changing the physical structure of the recording head or carriage.
2Manufacturing precision
If multiple nozzle arrays are adjusted independently, then local impact position accuracy is improved, but overall recording consistency deteriorates due to overlapping dots and density nonuniformity
Solution Approach 1:
The patent applies local quality by setting different adjustment values (discharge timing offsets) for different nozzle arrays based on their specific impact position deviations. Each nozzle array is adjusted locally according to its measured performance, while the systematic approach ensures overall consistency. The adjustment values are determined individually for each nozzle array but coordinated to maintain uniform recording density across all arrays.
Data Source
AI summary
The present invention preferentially sets an adjustment value of a nozzle array having a deviation amount in a conveyance direction which exceeds a threshold amount, and sets the adjustment value in such a manner that the total of deviation amounts of a plurality of nozzle arrays can be minimized.