Printer Feed Roller Gain Control for Vibration Reduction
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Solution Overview
Problem
Existing print media feeding mechanisms in printers, particularly in large format printers, face challenges in maintaining stability and accuracy due to the need for precise control of the feed roller, which can lead to vibrations and noise when the pinch roller is moved to an open position, and are often unsuitable for lower-cost or smaller printers due to complexity.
Innovation Solution
A control method and system that adjusts a gain parameter based on the position of the pinch roller relative to the feed roller, using detection and sensing means to control the drive mechanism, ensuring high sensitivity when the pinch roller is closed and reduced sensitivity or insensitivity when it is open to prevent instability and vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the gain parameter is kept high to maintain printing accuracy, then feeding precision is improved, but vibrations and noise increase when the pinch roller is moved to an open position
Solution Approach 1:
The gain parameter is dynamically adjusted based on the operational state of the pinch roller. When the pinch roller is in the closed position during printing, a high gain value is used to maintain feeding precision. When the pinch roller is moved to the open position, the gain value is reduced to minimize vibrations and noise. This dynamic adjustment resolves the contradiction by adapting the system's sensitivity to the current operational context.
Solution Approach 2:
The system changes the gain parameter value based on the detected position of the pinch roller. By detecting whether the pinch roller is closed or open, the controller automatically adjusts the gain parameter between a first value (higher) and a second value (lower), thereby optimizing both feeding precision and vibration reduction without requiring additional hardware.
2Object-generated harmful factors
If the gain parameter is reduced to minimize vibrations when the pinch roller is open, then harmful factors are reduced, but feeding precision deteriorates
Solution Approach 1:
The gain parameter is not fixed but dynamically adjusted according to the operational state. During printing operations with the pinch roller closed, the system uses a higher gain value to maintain feeding precision. When the pinch roller is opened, the gain is automatically reduced to minimize vibrations. This dynamic behavior allows the system to optimize both precision and vibration reduction at different operational phases.
Solution Approach 2:
The system incorporates detection means that monitor the position of the pinch roller and provide feedback to the controller. Based on this feedback, the controller automatically adjusts the gain parameter to the appropriate value, ensuring that feeding precision is maintained during printing while vibrations are minimized during media loading or release operations.
3Stability of the object's composition
If a braking system is added to stabilize the feed roller when the pinch roller is open, then stability is improved, but device complexity increases
Solution Approach 1:
Instead of adding a braking system, the patent stabilizes the feed roller by changing the gain parameter value. When the pinch roller is detected to be in the open position, the controller automatically reduces the gain parameter to a lower value, which inherently stabilizes the feed roller and reduces vibrations. This parameter-based solution achieves stability without increasing mechanical complexity or adding additional hardware components.
Solution Approach 2:
The patent replaces the need for a mechanical braking system with a control-based solution. By using the detection means and controller to adjust the gain parameter, the system achieves feed roller stability through electronic control rather than mechanical braking, thereby reducing device complexity while maintaining stability.
4Manufacturing precision
If a complicated media feed mechanism is used to improve performance, then feeding accuracy is improved, but ease of manufacture deteriorates
Solution Approach 1:
The patent achieves improved feeding accuracy by dynamically adjusting the gain parameter based on the pinch roller position, rather than by adding complex mechanical components. This software-based adaptive control approach maintains high feeding accuracy while keeping the mechanical structure simple and easy to manufacture, particularly for lower-cost or smaller printers.
Solution Approach 2:
The system improves feeding accuracy through parameter adjustment rather than mechanical complexity. By detecting the pinch roller position and automatically adjusting the gain parameter between two values, the system achieves high feeding precision without requiring complicated mechanical feed mechanisms, making it suitable for a wide range of printer types including lower-cost models.
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 solution stabilizes the feed roller system, maintains printing accuracy, and avoids the need for additional hardware like braking systems, reducing costs and noise, while being suitable for a range of printer sizes.
Implementation Method 1
detection means for detecting movement of the pinch roller
Implementation Method 2
sensing means for sensing movement of a feed roller
Implementation Method 3
a controller arranged to control the drive means using a gain parameter and signals provided by the detection means and the sensing means
Data Source
AI summary
A print media feed system comprises: a drive unit configured to move a feed roller; a sensing unit configured to sense movement of a feed roller; a detection unit configured to detect movement of a pinch roller; and a controller arranged to control the drive unit using a gain parameter and signals provided by the detection unit and the sensing unit. If it is detected that the pinch roller is in a first position in which the pinch roller presses against the feed roller such that a print media is between the pinch roller and the feed roller, the gain parameter is set to a first value. If it is detected that the pinch roller is not in the first position, the gain parameter is set to a second value which is lower than the first value.