Head Module Positional Displacement Analysis Inkjet Printing
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Solution Overview
Problem
Existing methods for analyzing positional displacement between head modules in inkjet printing fail to accurately measure large displacement errors and ensure correct initial attachment conditions, leading to suboptimal image quality.
Innovation Solution
A method involving dual dynamic range analysis using a first measurement chart for precise accuracy and a second measurement chart for rough accuracy, allowing selection of the appropriate accuracy level based on displacement magnitude, combined with independent recording and analysis of head module positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single precise analysis method is used for measuring positional displacement between head modules, then measurement accuracy is improved for small displacement values, but the method fails to accurately measure large displacement errors
Solution Approach 1:
The measurement process is segmented into two distinct analysis methods: a first analysis method for small displacement values and a second analysis method for large displacement values. The system divides the measurement task by displacement magnitude, applying the appropriate method based on the measured range, thereby achieving both precision for small values and adaptability for large values.
Solution Approach 2:
The system dynamically switches between two different analysis methods based on the measured displacement value. When the displacement exceeds a predetermined threshold, the system transitions from the first analysis method to the second analysis method, making the measurement system adaptive to different operational conditions rather than relying on a single static approach.
2Manufacturing precision
If head modules are joined with high precision requirements, then image quality is improved, but the complexity of assembly and adjustment increases
Solution Approach 1:
The system performs preliminary measurement of the positional displacement between head modules before final assembly completion. By measuring and identifying displacement errors early, the system enables preliminary adjustment to be made, preventing the need for complex rework later and simplifying the overall assembly process while ensuring high nozzle interval uniformity.
Solution Approach 2:
The system provides feedback on the measured positional displacement between head modules, enabling operators to make informed adjustments. This feedback mechanism simplifies the adjustment process by providing quantitative guidance on what corrections are needed, reducing the complexity of achieving high manufacturing precision in nozzle interval uniformity.
Data Source
AI summary
The positional displacement shift amount between the head modules is calculated in a first dynamic range and with a first arithmetic accuracy, and calculated in a second dynamic range wider than the first dynamic range and with a second arithmetic accuracy rougher than the first arithmetic accuracy and finer than the first dynamic range, and as a positional displacement shift amount between the head modules in the first direction, the positional displacement shift amount with the second arithmetic accuracy is selected if the positional displacement shift amount with the second arithmetic accuracy exceeds the first dynamic range, and the positional displacement shift amount with the first arithmetic accuracy is selected if within the first dynamic range.