Image Forming Apparatus Discharge Position Correction
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Solution Overview
Problem
Existing image forming apparatuses face challenges in maintaining accurate alignment of discharge positions from multiple liquid-discharge head units across different types of recording media, leading to variations in printing quality.
Innovation Solution
The image forming apparatus incorporates a discharger with multiple liquid-discharge head units and circuitry that detects displacement in discharge positions based on the type of recording medium. It performs a first correction to stabilize discharge timing and a second correction to align discharge positions, with the option to reuse past correction results for different types of media.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the discharge timing is adjusted to maintain stable discharge positions for a specific recording medium type, then the printing accuracy for that medium type is improved, but the alignment may become incorrect when switching to a different recording medium type
Solution Approach 1:
The discharge timing is made dynamically adjustable based on the detected recording medium type. The system transitions from static, fixed timing to dynamic, adaptive timing that automatically adjusts when different media types are detected, resolving the contradiction between maintaining accuracy for one medium and adapting to others.
Solution Approach 2:
The system changes the discharge timing parameter according to the recording medium type. By detecting the medium type and adjusting the timing parameter accordingly, the system maintains printing accuracy across different medium types without requiring manual intervention.
2Manufacturing precision
If the discharge timing is adjusted for each different recording medium type, then the printing accuracy for each medium type is maintained, but the time required for alignment adjustment increases
Solution Approach 1:
The system performs preliminary detection of the recording medium type before adjusting discharge timing. By detecting the medium type in advance and having pre-established correction data, the system can quickly apply the appropriate timing adjustment without requiring time-consuming real-time alignment procedures.
Solution Approach 2:
The system uses feedback from recording medium type detection to automatically select and apply the appropriate discharge timing correction. This closed-loop approach eliminates manual alignment procedures and significantly reduces adjustment time while maintaining accuracy.
3Manufacturing precision
If repeated inter-color alignment adjustments are performed for different recording medium types, then the discharge position alignment is maintained, but the productivity is reduced
Solution Approach 1:
The system performs self-service alignment by automatically detecting the recording medium type and autonomously applying the appropriate discharge timing correction. This eliminates the need for manual inter-color alignment adjustments, maintaining discharge position alignment while significantly improving printing productivity.
Data Source
AI summary
An image forming apparatus includes a discharger and circuitry. The discharger includes liquid-discharge head units to discharge liquid to form an image on a recording medium conveyed in a direction. The circuitry detects displacement in the direction of discharge positions on the recording medium between the liquid-discharge head units depending on a type of the recording medium. The circuitry performs, based on a result of detection of the displacement, a first correction to correct timing of discharge from the liquid-discharge head units to keep the discharge positions of the liquid-discharge head units stable regardless of the type of the recording medium. The circuitry performs, after the first correction, a second correction to correct the timing of discharge from the liquid-discharge head units to align the discharge positions of the liquid-discharge head units, unless the second correction has been completed on the recording medium of another type in past.