Image Formation Apparatus Medium Conveyance Control Switching
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Solution Overview
Problem
Image formation apparatuses struggle to perform accurate medium conveyance control when switching between print modes based on the leading end and position detection marks, leading to potential undetected errors and improper conveyance.
Innovation Solution
The apparatus includes a conveyance controller that switches between two print modes by retracting the medium from a standby position to a position upstream of the detection point when changing from a mode based on the leading end to one based on position detection marks, ensuring accurate detection and conveyance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the image formation apparatus performs conveyance control based on the detected position of the leading end of the medium under the first print mode, then the conveyance control can be performed simply, but the apparatus may not be able to appropriately perform the conveyance control when switching to the second print mode that uses position detection marks
Solution Approach 1:
The system dynamically switches between two conveyance control methods: leading-end-based control for the first print mode and position detection mark-based control for the second print mode. The conveyance controller adapts the detection and control strategy based on the active print mode, ensuring both ease of operation and reliability in各自 appropriate contexts
Solution Approach 2:
The system changes the control parameter from leading end position to position detection mark position when switching from the first print mode to the second print mode. This parameter change enables the system to accommodate different medium types and printing requirements while maintaining reliable conveyance control
2Adaptability or versatility
If the apparatus switches from the first print mode to the second print mode after conveying the medium to a standby position, then the print mode flexibility is improved, but the position detection mark may not be accurately detected leading to improper conveyance
Solution Approach 1:
The system performs preliminary actions by detecting the position detection mark before final conveyance control is executed. When switching from the first print mode to the second print mode, the system ensures the medium is properly positioned and the mark is detected with high accuracy before resuming conveyance, preventing detection errors
Solution Approach 2:
The detector provides feedback on the position detection mark to the conveyance controller, which uses this information to adjust and refine the conveyance control. This feedback mechanism ensures accurate detection even when switching between print modes, as the system continuously monitors and corrects based on detected mark positions
3Device complexity
If the apparatus uses a single conveyance control method for both print modes, then the system complexity is reduced, but the apparatus cannot appropriately handle both leading-end-based and mark-based conveyance requirements
Solution Approach 1:
The conveyance controller is designed with multi-functionality to handle both leading-end-based conveyance control and position detection mark-based conveyance control. By integrating both control methods in a single controller that can adapt to different print modes, the system achieves versatility without proportionally increasing complexity
Solution Approach 2:
The system dynamically selects which conveyance control method to use based on the active print mode. The detector and controller adapt their operation mode accordingly, switching between detecting the leading end and detecting position detection marks, thereby providing both control methods without requiring separate dedicated systems for each
Data Source
AI summary
An image formation apparatus according to an embodiment may include: an image formation part; a conveyance part that conveys the medium; a detector that detects a leading end of the medium and a position detection mark on the medium; and a conveyance controller that controls the conveyance part under one of a first print mode based on one of the leading end of the medium and the position detection mark and a second print mode based on the other. The conveyance controller is configured, when switching from the first print mode to the second print mode when the medium stands by at a first standby position downstream of the detector, to retract the medium from the first standby position to a position upstream of the detector and then to resume to convey the medium.