Dynamic Roller Force Control for Thick Material Transport
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Solution Overview
Problem
Image reading apparatuses face challenges when handling thick materials, as the downstream rollers' load on the upstream rollers can cause a slowdown, leading to reduced reading quality due to the material's thickness.
Innovation Solution
The apparatus includes a pressing section that varies the second pressing force when the first transport roller pair transports a thick material, reducing the load on the first transport roller pair by lowering the second pressing force when the material enters the second transport roller pair's nip, ensuring a constant transport speed and preventing quality degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the second transport roller pair applies a high pressing force to transport thick material, then the material transport stability is improved, but the load on the first transport roller pair increases causing speed reduction
Solution Approach 1:
The pressing section dynamically adjusts the pressing force of the second transport roller pair based on the operational state. When the first transport roller pair is transporting material, the pressing section reduces the pressing force of the second roller pair to minimize load on the first roller pair and maintain transport speed. When the first roller pair is not transporting, the pressing section increases the pressing force of the second roller pair to ensure stable material transport.
Solution Approach 2:
The system changes the pressing force parameter of the second transport roller pair according to the operational conditions. By varying the pressing force from high to low based on whether the first roller pair is actively transporting material, the system optimizes both transport stability and speed performance.
2Reliability
If the second transport roller pair maintains high pressing force continuously, then the material gripping capability is improved, but the overall system efficiency decreases due to unnecessary load on upstream components
Solution Approach 1:
The pressing section implements dynamic adjustment of the second roller pair's pressing force based on real-time operational state detection. When the first roller pair is not transporting material, high pressing force ensures reliable material gripping. When the first roller pair is transporting, the pressing force is reduced to avoid unnecessary load and maintain system efficiency.
Solution Approach 2:
The system automatically adjusts the pressing force based on the operational state without requiring external intervention. The pressing section detects when the first roller pair is transporting material and autonomously reduces the second roller pair's pressing force accordingly, optimizing system efficiency while maintaining reliability when needed.
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 configuration maintains a consistent transport speed for thick materials, thereby enhancing the reading quality by reducing the load on the first transport roller pair and preventing material slipping, ensuring stable and high-quality image scanning.
Implementation Method 1
first and second pressure rollers. These rollers are driven by a single motor and receive elastic forces from the respective pressure-applying springs
Data Source
AI summary
A scanner includes: a first transport roller pair that transports a material; a reader that reads the material; a second transport roller pair that transports the material; a transport motor; and a pressing section. The transport motor 50 rotates both the rollers of the first transport roller pair and both the rollers of the second transport roller pair. The pressing section can vary a first pressing force generated in the first transport roller pair and a second pressing force generated in the second transport roller pair. The pressing section varies the second pressing force in such a way that the second pressing force when the first transport roller pair transports the material but the second transport roller pair does not transport the material becomes lower than the second pressing force when neither the first transport roller pair nor the second transport roller pair transports the material.