Drive Roller Torque Control for Recording Medium Tension
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing image recording devices experience tension fluctuations and slipping between drive rollers and recording media, leading to unstable transport and positional inaccuracies in image recording.
Innovation Solution
The implementation of a system with a detection unit to monitor tension between drive rollers, allowing for torque control of the second drive roller to maintain consistent tension, thereby preventing slipping and tension fluctuations, and ensuring stable transport and high positional precision in image recording.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If tension is given to the recording medium by providing a velocity difference to the circumferential velocity of the two drive rollers, then the recording medium is transported, but slipping occurs between the drive roller and the recording medium and the recording medium tension fluctuates
Solution Approach 1:
A tension detection unit detects the tension of the recording medium, and a control unit adjusts the circumferential velocity of the drive rollers based on the detected tension to maintain constant tension during transport, preventing slipping and ensuring stable transport
Solution Approach 2:
The circumferential velocity of the drive rollers is made dynamically adjustable rather than fixed, allowing the system to adapt the velocity difference between rollers based on real-time tension conditions to maintain optimal transport without slipping
2Speed
If tension is given to the recording medium by providing a velocity difference to the circumferential velocity of the two drive rollers, then the recording medium is transported, but the ink impact position on the recording medium fluctuates and it is not possible to record the image with sufficient positional precision
Solution Approach 1:
The tension detection unit provides real-time feedback on recording medium tension, and the control unit adjusts roller velocities to maintain constant tension, ensuring the recording medium moves at a stable speed and position during image recording for high precision
Solution Approach 2:
The system replaces simple mechanical velocity difference control with a controlled system that uses tension detection and active velocity adjustment to achieve precise positioning, substituting passive mechanical transport with active controlled transport
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach effectively stabilizes the recording medium's tension from the detection point to the second drive roller, enabling precise and stable image recording by controlling the torque of the second drive roller based on detected tension, reducing the occurrence of wrinkles and ensuring high positional accuracy.
Implementation Method 1
a detection unit for detecting the tension of the support member between the first drive roller and the second drive roller
Implementation Method 2
a control unit that gives tension to the recording medium by controlling the torque of the second drive roller based on the tension of the recording medium detected by the detection unit
Implementation Method 3
a recording unit that ejects a liquid on a recording medium supported on the support member and records an image
Data Source
AI summary
An image recording device comprising: a transport unit that transports a recording medium from a first drive roller to a second drive roller by rotating the first drive roller and the second drive roller across which a recording medium is stretched, a detection unit that detects tension of the recording medium between the first drive roller and the second drive roller, a support member that supports the recording medium between the detection unit and the second drive roller, a recording unit that ejects liquid on the recording medium supported on the support member and records an image, and a control unit that gives tension to the recording medium by controlling the torque of the second drive roller based on the recording medium tension detected by the detection unit.