Recording Apparatus Medium Transport Meandering Reduction
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Solution Overview
Problem
In printers, errors in medium transport due to eccentric rotation or differences in transport amount between the ends of the medium in the width direction lead to fluctuations, affecting printing quality.
Innovation Solution
A recording apparatus with a medium support unit that slackens the medium between the clamping and support units, reducing tension and improving straightness by adjusting the slackening amount and clamping force, and incorporating a bending path to enhance transport stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the medium is transported with constant tension between the first transport mechanism and the second transport mechanism, then the medium transport is stable, but printing quality deteriorates due to transport amount errors from eccentric rotation and width direction differences
Solution Approach 1:
The transport path is divided into multiple sections with different tension characteristics. The medium is slackened between the medium clamping unit and medium support unit, creating distinct tension zones that allow each section to perform its function independently - the clamping unit provides stable transport while the slackened section compensates for eccentricity and width direction variations
Solution Approach 2:
The tension parameter of the medium is dynamically changed along the transport path. By adjusting the clamping force of the medium support unit and creating a slackened section, the system transforms the medium from a high-tension state (for stable transport) to a low-tension state (for error compensation), resolving the contradiction between transport stability and printing precision
2Stability of the object's composition
If tension is applied to the medium between the roll body and the medium support unit, then meandering due to roll body eccentricity is reduced, but transport amount differences in the width direction are exacerbated
Solution Approach 1:
The transport path is segmented into a tensioned section (from roll body to medium support unit) for straightness control and a slackened section (between medium support unit and medium clamping unit) for transport amount equalization. This segmentation allows each section to address different aspects of medium transport quality independently
Data Source
AI summary
Meandering of a medium at a time of transporting is reduced. A recording apparatus which transports medium and performs recording on the medium is provided. The apparatus includes a recording unit, a medium clamping unit which is provided on a side further upstream than the recording unit in a transport direction, and clamps the medium therebetween, and a medium support unit which is provided on the side further upstream than the medium clamping unit in the transport direction, and supports the medium. The medium is slackened between the medium clamping unit and the medium support unit.