Printing Equipment Paper Meandering Error Correction
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Solution Overview
Problem
Existing printing equipment struggles to maintain accurate overprinting positions due to paper meandering, which causes instability in paper feed, as stabilizing paper feed rate alone is insufficient to address this issue.
Innovation Solution
Incorporating a paper deviation detector, a paper meandering profile acquisition module, a paper feed error calculator, and a corrector to detect paper deviation, acquire meandering profiles, calculate paper feed errors, and correct image formation timing based on these calculations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If paper feed rate is stabilized by suppressing motor rotation instability, then paper conveyance speed stability is improved, but paper feed errors caused by meandering in width direction cannot be suppressed
Solution Approach 1:
The patent applies feedback by using the paper deviation detector to continuously monitor paper position in the main scanning direction and feeding this information back to the controller. The controller then calculates paper feed errors based on this feedback and adjusts image formation timing accordingly, creating a closed-loop control system that compensates for meandering-induced feed errors.
Solution Approach 2:
The patent replaces mechanical steering mechanisms with an optical/electronic detection and correction system. Instead of using complex mechanical devices to physically steer the paper and prevent meandering, the system uses a paper deviation detector to sense paper position and electronically corrects the resulting feed errors through software-based timing adjustment.
2Manufacturing precision
If complex steering mechanisms are used to correct paper meandering, then paper feed accuracy is improved, but device complexity increases
Solution Approach 1:
The patent replaces complex mechanical steering mechanisms with a simpler optical detection and electronic correction system. The paper deviation detector optically senses paper position, and the controller electronically compensates for errors through timing adjustment, eliminating the need for complex mechanical steering components.
Solution Approach 2:
The system uses feedback from the paper deviation detector to continuously monitor and correct paper position errors. This feedback mechanism allows for accurate paper feed correction without requiring complex mechanical steering, as the system adapts to meandering in real-time through electronic timing adjustment.
3Manufacturing precision
If paper deviation detection and correction systems are added, then overprinting position accuracy is improved, but device complexity increases
Solution Approach 1:
The patent makes the controller multi-functional by having it perform both the correction of paper feed errors and the control of image formation timing. The controller integrates the paper deviation detection feedback, calculates feed errors, and adjusts timing all within its existing functionality, avoiding the need for separate dedicated correction devices.
Solution Approach 2:
The system uses feedback from the paper deviation detector to continuously monitor paper position and feed errors. This feedback is processed by the controller to calculate correction values and adjust image formation timing, creating an integrated feedback-based correction system that improves accuracy without requiring complex additional hardware.
Data Source
AI summary
There is provided printing equipment that enhances the overprinting position accuracy in overprinting and a printing method for the printing equipment. In the printing method, a paper meandering profile acquisition part acquires a meandering profile of paper from a result of detection by a paper deviation detection sensor. A paper speed profile acquisition part acquires a paper speed profile from a result of detection by a paper conveyance speed detection sensor. A paper feed error calculator calculates a paper feed error on the basis of the meandering profile and paper speed profile. A paper feed error corrector corrects the image formation timing on the basis of a result of calculation by the paper feed error calculator.