Bidirectional Printing Ejection Timing Correction
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Solution Overview
Problem
In bidirectional printing, the liquid ejecting apparatus faces challenges in maintaining accurate ejection timing due to degradation over time, requiring frequent adjustments of correction values for different speed modes and power supply modes, leading to print shifting issues.
Innovation Solution
A liquid ejecting apparatus with a control unit that performs bidirectional printing using a correction value acquisition unit to determine and store correction information for various speed modes, allowing for automatic adjustment of ejection timing based on stored data, eliminating the need for manual setting of correction values for each mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manual adjustment of correction values is performed for each speed mode and power supply mode, then print accuracy is improved, but operation complexity and time consumption increase
Solution Approach 1:
The system automatically detects the current power supply mode and speed mode, then autonomously selects and applies the appropriate correction value from stored data without requiring manual intervention. The control unit performs automatic mode detection and correction value application, making the system self-servicing regarding correction value management.
Solution Approach 2:
Correction values for different speed modes and power supply modes are pre-calculated and stored in the storage unit before actual printing operations. This preliminary preparation eliminates the need for manual adjustment during operation, as the system simply retrieves the pre-prepared correction values based on detected conditions.
2Manufacturing precision
If correction values are adjusted frequently to account for degradation over time, then print quality is maintained, but productivity decreases
Solution Approach 1:
The system incorporates a feedback mechanism where the control unit continuously monitors the current operating conditions (power supply mode and speed mode) and automatically adjusts the correction value selection based on this feedback. This closed-loop approach maintains print quality without requiring frequent manual interventions, as the system self-corrects based on real-time condition changes.
Solution Approach 2:
The correction value selection is made dynamic and adaptive to changing operating conditions. Instead of using a fixed correction value, the system dynamically selects appropriate correction values based on the detected power supply mode and speed mode, allowing it to adapt to degradation and condition changes without manual reconfiguration.
3Measurement precision
If separate correction values are stored for each speed mode and power supply mode, then ejection timing accuracy is improved, but device complexity increases
Solution Approach 1:
The storage unit is designed to universally store correction values for multiple combinations of speed modes and power supply modes within a single integrated structure. The control unit universally handles detection of any mode combination and selects the appropriate correction value from this unified storage, eliminating the need for separate complex management systems for each mode.
Solution Approach 2:
The system organizes correction values in a multi-dimensional structure indexed by both power supply mode and speed mode parameters. This dimensional organization allows efficient retrieval of the correct correction value based on the current operating conditions, managing complexity through structured data organization rather than requiring separate physical systems for each mode combination.
Data Source
AI summary
When a power supply mode is an AC power mode, if a correction value which is read out from a non-volatile memory is a second correction value α2 corresponding to a battery mode, a first correction value α1 is calculated according to an equation α1=α2×K2 using the second correction value α2, and bidirectional printing is performed by controlling an ejection timing of a print head based on the first correction value α1. Meanwhile, when a power supply mode is the battery mode, if the correction value is the first correction value α1 corresponding to the AC power mode, the second correction value α2 is calculated according to an equation α2=α1×K1 using the first correction value α1, and bidirectional printing is performed by controlling the ejection timing of the print head based on the second correction value α2.