Liquid Ejecting Device Conveyance Adjustment Method
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Solution Overview
Problem
Current liquid ejecting devices face challenges in accurately and efficiently adjusting the conveyance amount for high-quality image recording, as the time required for fine adjustments is lengthy, and combining rough and fine adjustment patterns does not sufficiently shorten this time.
Innovation Solution
A liquid ejecting device that forms a combination of rough and fine adjustment patterns by shifting nozzle rows in specific cycles and directions, allowing simultaneous formation of these patterns to reduce the time needed for conveyance amount adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If only a fine adjustment pattern is used to adjust conveyance amount, then manufacturing precision is improved, but loss of time increases
Solution Approach 1:
The adjustment pattern is segmented into multiple types (first through fourth patterns) with different adjustment purposes. The first and second patterns provide rough adjustment with larger shifts, while the third and fourth patterns provide fine adjustment with smaller shifts. This segmentation allows the system to perform both rough and fine adjustments in a single pass, resolving the contradiction between adjustment accuracy and time consumption.
2Manufacturing precision
If a rough adjustment pattern is combined with a fine adjustment pattern sequentially, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
Multiple adjustment patterns (first, second, third, and fourth patterns) are merged into a single comprehensive adjustment process. All patterns are formed in one pass with the ejecting unit moving in the first direction, rather than requiring separate sequential operations. This merging reduces device complexity while maintaining the benefits of both rough and fine adjustment.
3Productivity
If multiple adjustment patterns are formed simultaneously in one direction, then productivity is improved, but measurement precision requirements increase
Solution Approach 1:
The system uses image density measurements of the formed patterns to determine the optimal conveyance amount. By measuring the image density of multiple patterns (first through fourth patterns) and their positional relationships, the system obtains feedback information that enables precise determination of the conveyance amount while maintaining high productivity through simultaneous pattern formation.
Data Source
AI summary
While moving an ejecting unit, first patterns and second patterns are formed in a first direction on a medium. Third patterns corresponding to the first patterns are formed while changing a shifted amount by which the third patterns is shifted from the first patterns by a first shift amount in the second direction. Fourth patterns corresponding to the second patterns are formed while changing a shifted amount by which the fourth patterns is shifted from the second patterns by a first shift amount in the second direction. In a rough adjustment pattern, image density of a pair of patterns, which are formed of the first pattern and the corresponding third pattern, changes in the first direction in a first cycle. In a fine adjustment pattern, image density of a pair of patterns, which are formed of the second pattern and the corresponding fourth pattern, changes in a second cycle.