Conveyance Belt Synchronization via Dual Sensor Feedback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing image forming apparatuses face challenges in synchronizing the rotation of conveyance drums and belts, leading to deviations in sheet conveyance timing, which can result in slippage or positional errors, affecting image formation and drying processes.
Innovation Solution
A recording medium conveying device with a conveyance belt, a first sensor to detect the recording medium, and a second sensor to detect the home position of the belt, along with circuitry to adjust the belt's rotation speed, ensuring synchronization between the conveyance drum and belt by correcting deviations in detection timings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the conveyance drum and conveyance belt are rotated in synchrony to meet the image forming position, then the sheet conveyance timing is improved, but deviations in detection timing occur due to mechanical errors, causing positional errors
Solution Approach 1:
The system uses sensors to detect the actual positions of the conveyance drum and conveyance belt, feeds this information back to the control unit, which then calculates and applies corrections to eliminate detection timing deviations and maintain accurate synchronization
Solution Approach 2:
The control unit dynamically adjusts rotational parameters (speed, phase) of the conveyance drum and/or conveyance belt based on detected timing deviations, changing operational parameters in real-time to maintain precise synchronization despite mechanical errors
2Manufacturing precision
If synchronization control is applied to correct conveyance timing deviations, then the sheet positioning accuracy is improved, but the control system complexity increases
Solution Approach 1:
Sensors detect actual conveyance positions and feed this information back to the control unit, which automatically calculates and applies corrections, eliminating the need for complex manual calibration while maintaining high positioning accuracy
Solution Approach 2:
The system performs self-correction by automatically detecting timing deviations and adjusting its own operational parameters without external intervention, simplifying the overall control architecture while maintaining precision
3Measurement precision
If the conveyance belt speed is adjusted to correct timing deviations, then the synchronization accuracy is improved, but abrupt speed changes may affect the operation stability
Solution Approach 1:
The system dynamically adjusts the conveyance belt speed in real-time based on detected timing deviations, enabling flexible correction while maintaining operational stability through controlled, adaptive parameter changes rather than abrupt adjustments
Data Source
AI summary
A recoding medium conveying device includes a conveyance belt, a first sensor, a second sensor, and circuitry. The conveyance belt has an endless loop shape and a length capable of conveying a plurality of recording media in one rotation. The first sensor is disposed upstream from the conveyance belt in a conveyance direction of a recording medium and is configured to detect the recording medium. The second sensor is configured to detect a home position of the conveyance belt. The circuitry is configured to adjust a rotation speed of the conveyance belt, while the conveyance belt makes one rotation, to eliminate an amount of deviation between a first detection timing of the recording medium detected by the first sensor and a second detection timing of the home position of the conveyance belt detected by the second sensor.