Dynamic Ejection Roller Speed Control for Paper Misalignment
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Solution Overview
Problem
Existing medium ejection apparatuses face challenges in efficiently conveying and ejecting media of different sizes without causing misalignment or abnormal ejection, as they often rely on fixed conveyance speeds that can lead to scattering or buckling, especially when handling smaller or larger sized media.
Innovation Solution
A medium ejection apparatus equipped with a processor that detects the size of the medium and adjusts the conveyance speed of the ejection roller from a first speed to a second, lower speed mid-ejection, ensuring proper alignment and preventing abnormal ejection by optimizing the conveyance speed based on the medium's size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a fixed high conveyance speed is used for the ejection roller, then large sized media can be ejected efficiently without bending, but small sized media will scatter or fly far off the ejection tray
Solution Approach 1:
The ejection roller conveyance speed is changed dynamically during the ejection process. The processor controls the drive mechanism to switch from a first conveyance speed to a second conveyance speed (lower than the first) in the middle of ejecting the medium, optimizing both ejection efficiency and alignment precision for different media sizes
Solution Approach 2:
The conveyance speed parameter of the ejection roller is adjusted based on the detected size of the medium. The processor changes the second conveyance speed in accordance with the size of the medium, allowing the system to adapt to different media dimensions and prevent scattering while maintaining ejection efficiency
2Manufacturing precision
If a fixed low conveyance speed is used for the ejection roller, then small sized media can be ejected with good alignment, but large sized media may bend or fail to eject properly
Solution Approach 1:
The ejection roller operates with variable conveyance speed during the ejection process. The processor controls the drive mechanism to switch from a first conveyance speed to a second conveyance speed (lower than the first) in the middle of ejecting the medium, allowing large media to be ejected efficiently while small media maintain good alignment
Solution Approach 2:
The processor detects the size of the medium before completing the ejection process and adjusts the conveyance speed accordingly. This preliminary detection and adjustment ensures that the appropriate speed is applied to prevent bending of large media or scattering of small media
3Device complexity
If a single conveyance speed is used for all media sizes, then the ejection mechanism remains simple, but abnormal ejection or jamming occurs with certain media sizes
Solution Approach 1:
The processor detects the size of the medium and uses this feedback information to control the drive mechanism, adjusting the conveyance speed of the ejection roller accordingly. This feedback-based control improves ejection reliability for different media sizes while maintaining relatively simple device architecture
Solution Approach 2:
The ejection roller conveyance speed is made dynamic and adjustable based on medium size detection. The processor controls the drive mechanism to switch between different conveyance speeds during ejection, preventing abnormal ejection or jamming while keeping the control system manageable
Data Source
AI summary
A medium ejection apparatus includes an ejection roller, an ejection tray to stack a medium ejected by the ejection roller, a drive mechanism to drive the ejection roller, a processor to detect a size of the medium ejected by the ejection roller, and control the drive mechanism to control a conveyance speed of the ejection roller when ejecting the medium. The processor changes the conveyance speed of the ejection roller from a first conveyance speed to a second conveyance speed lower than the first conveyance speed in the middle of ejecting the medium. The processor changes the second conveyance speed in accordance with the size of the medium.