Sheet Feeder Dynamic Brake Control for Jamming
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Solution Overview
Problem
Existing sheet feeders face issues with faulty and overlap feeding due to varying sheet types and environments, requiring complex adjustments that can lead to performance degradation and increased jamming, especially when handling mixed forms of sheets.
Innovation Solution
A sheet feeder with real-time monitoring and feedback control systems, including detectors for the brake roller and separator roller rotations, and a controller that optimally adjusts the separation force based on the sheet's state and characteristics, ensuring proper feeding of individual sheets even in mixed-form loading.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the separating force is enhanced to eliminate overlap feeding, then overlap feeding is prevented, but jamming increases and the life of expendables is shortened
Solution Approach 1:
The brake roller's rotational load is made dynamically adjustable through feedback control. The system continuously monitors sheet separation state and automatically adjusts the brake roller's rotational load to optimize separation force, preventing overlap feeding while avoiding excessive force that causes jamming and wear.
Solution Approach 2:
The system changes the operational parameters of the brake roller based on detected sheet characteristics and separation state. By adjusting rotational load parameters in real-time, the system adapts the separating force to match actual conditions, eliminating overlap feeding without causing harmful jamming effects.
2Reliability
If device settings are adjusted to sheet characteristics to improve feeding performance, then feeding performance is optimized, but the device complexity increases and requires engineer adjustment
Solution Approach 1:
The system incorporates automatic feedback control that monitors sheet separation state and adjusts brake roller rotational load without user intervention. Detection units provide real-time information about sheet characteristics and separation effectiveness, enabling the controller to automatically optimize feeding performance for different sheet types without requiring engineer adjustment or increasing device complexity.
Solution Approach 2:
The device performs self-adjustment of separation parameters based on automatic detection of sheet characteristics. The system serves itself by continuously monitoring its own operation and making necessary parameter adjustments, eliminating the need for external engineer intervention while maintaining optimized feeding performance.
3Adaptability or versatility
If the separating force is increased to handle mixed sheet types, then separation effectiveness improves, but performance deteriorates for identical sheet types
Solution Approach 1:
The brake roller's rotational load is dynamically adjusted based on real-time detection of sheet characteristics and separation state. This dynamic adjustment allows the system to handle mixed sheet types effectively while maintaining optimal performance for identical sheet types, as the force is precisely controlled rather than consistently high.
Solution Approach 2:
The system changes operational parameters adaptively based on detected sheet conditions. When handling mixed sheet types, the controller adjusts the brake roller's rotational load to provide sufficient separation force. When handling identical sheet types, the system maintains appropriate force levels, preventing performance deterioration through parameter optimization.
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
The system effectively prevents overlap feeding and faulty feeding by dynamically adjusting the separation force, improving the reliability and efficiency of sheet feeding across different types and environments, while minimizing jamming and extending the life of components.
Implementation Method 1
the topmost sheet is picked by the frictional force of its portion which comes into contact with the pick roller
Implementation Method 2
sheets are separated by making use of a difference between the coefficient of friction between sheets and the coefficient of friction with a separating member
Data Source
AI summary
A pick roller picks a sheet stacked in a hoper and transports the sheet toward a separating section at which a separator roller and a brake roller is provided. The separator roller and the brake roller transport the sheet one by one. A first unit is provided on the brake roller and is adapted to detect a rotation of the brake roller. A second unit is provided in the separating section and is adapted to detect a speed of the sheet. A controller is operable to determine an entry state of the sheet with respect to the separator roller based on presence or absence of the sheet in the separating section determined from the speed of the sheet in the separating section and whether or not the brake roller is rotating, and to optimally control a force acting in separation for the sheet.