Printing Apparatus Timing Roller Perimeter Correction
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Solution Overview
Problem
Current printing apparatuses face difficulties in accurately monitoring and correcting temporal variations in recording position shifts during printing, leading to incorrect adjustment of printing timings due to a time lag between shift generation and detection.
Innovation Solution
A printing method and apparatus that store and modify correction data based on the perimeter of a timing roller, allowing real-time adjustment of printing timings to maintain accurate positioning of recording element arrays on a moving medium.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If correction data is acquired and stored based on the timing roller perimeter at a specific point in time, then printing timing correction can be performed, but the correction becomes inaccurate when the timing roller perimeter changes during printing due to thermal expansion or contraction
Solution Approach 1:
The correction data is made dynamic by continuously updating it based on real-time timing roller perimeter measurements. Instead of using static correction data acquired at a single point in time, the system periodically reacquires the timing roller perimeter and updates the correction data accordingly, allowing the correction values to adapt to thermal expansion or contraction of the timing roller during printing operations
Solution Approach 2:
The system implements a feedback mechanism where the timing roller perimeter is continuously monitored and the correction data is updated based on the measured perimeter changes. This closed-loop feedback ensures that printing timing corrections remain accurate even when the timing roller perimeter varies due to temperature changes or other factors during printing
2Measurement precision
If inspection pattern printing and scanning is performed continuously to monitor shift amounts, then real-time correction data can be obtained, but printing productivity decreases due to the time required for inspection pattern printing and scanning
Solution Approach 1:
Instead of continuously printing and scanning inspection patterns, the system performs these operations periodically at predetermined intervals. This periodic inspection approach maintains sufficient monitoring accuracy while minimizing the impact on printing productivity, as the inspection pattern printing and scanning only temporarily interrupts the normal printing workflow at scheduled moments
Solution Approach 2:
The system uses the timing roller's own rotational characteristics and perimeter measurements to generate correction data, rather than relying entirely on external inspection patterns. By leveraging the timing roller's inherent properties and periodically measuring its perimeter, the system reduces dependency on continuous inspection pattern printing and scanning, thereby improving overall printing productivity while maintaining correction accuracy
Data Source
AI summary
Provided is a printing method of performing printing onto a recording medium to be transported with a plurality of recording element arrays. The printing method includes a storing step of storing a perimeter of a timing roller upon acquiring correction data in association with the correction data, an obtaining step of obtaining the perimeter during printing after the storing step of storing the perimeter upon acquiring the correction data, and a modifying step of modifying the correction data during the printing in accordance with the perimeter upon acquiring the correction data and the perimeter during the printing.