Comber Detaching Roller Movement Curve Control
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Solution Overview
Problem
Existing comber systems face challenges in setting a suitable movement curve for the detaching roller, which is crucial for sliver quality and machine load, especially under increased productivity demands, due to mechanical limitations in transmitting rotation from the combing cylinder shaft to the detaching roller.
Innovation Solution
A movement setting device for the detaching roller that uses a computing unit and input unit to set a movement curve plotted along eight points, including distinctive and auxiliary points, allowing for flexible adjustment of speed, movement length, and piecing speed, driven by independent servomotors to overcome mechanical limitations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a mechanical mechanism (cam or crank) transmits rotation from the combing cylinder shaft to the detaching roller, then the movement curve can be mechanically determined, but the movement curve shape is limited by the mechanical structure
Solution Approach 1:
The patent replaces the mechanical transmission mechanism (cam or crank) with an independent motor to drive the detaching roller. This substitution eliminates the structural limitations of mechanical mechanisms on movement curve shapes, allowing flexible adjustment of movement parameters through electrical control while achieving the desired follower movement pattern.
Solution Approach 2:
The patent employs an independent motor with controllable speed and direction to drive the detaching roller, enabling dynamic adjustment of the movement curve according to spinning conditions. The motor can independently control the rotation speed and direction of the detaching roller, providing adaptability without the constraints of fixed mechanical transmission ratios.
2Adaptability or versatility
If the rotation of the cylinder shaft is transmitted mechanically to drive the detaching roller, then the structure is compact, but the movement curve is constrained by mechanical limitations
Solution Approach 1:
The patent substitutes the mechanical transmission system with an independent motor-driven system. This replacement enables flexible adjustment of the movement curve through electrical control parameters (speed, direction, acceleration) while maintaining a relatively simple overall structure, as the independent motor eliminates the need for complex cam or crank mechanisms.
Solution Approach 2:
The patent changes the control parameter from mechanical geometry (cam profile or crank radius) to electrical parameters (motor speed, torque, rotation direction). This parameter change allows the movement curve to be adjusted by changing motor control settings rather than redesigning mechanical components, significantly improving adaptability while keeping the structure simple.
3Adaptability or versatility
If an independent servomotor drives the detaching roller, then the movement curve can be set without mechanical limitations, but it is difficult to set a suitable movement curve for spinning conditions
Solution Approach 1:
The patent implements a control system that monitors spinning conditions and adjusts the servomotor parameters accordingly. By incorporating feedback mechanisms, the system can automatically determine appropriate movement curves based on real-time spinning parameters, making the operation easier while maintaining the freedom to set various movement patterns.
Solution Approach 2:
The patent pre-programs multiple movement curve patterns that are optimized for different spinning conditions. Before operation, suitable movement curves are selected and configured based on expected spinning parameters, eliminating the need for complex real-time adjustments while maintaining operational flexibility.
4Reliability
If the movement curve exceeds the movement capacity of the servomotor, then the desired movement cannot be achieved, but setting appropriate limits reduces flexibility
Solution Approach 1:
The patent incorporates feedback control that monitors servomotor performance parameters (current, temperature, position error). When the movement curve approaches the servomotor's capacity limits, the system automatically adjusts the parameters or selects alternative curves to prevent overload, ensuring reliable operation while maintaining as much flexibility as possible within safe operating boundaries.
Solution Approach 2:
The patent uses dynamic parameter adjustment where the movement curve is adapted in real-time based on servomotor capacity status. If the servomotor approaches its limits, the system dynamically modifies the movement curve parameters (reducing speed, acceleration, or range) to stay within capacity while still achieving the essential functional requirements.
Data Source
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AI summary
A detaching roller movement setting device for a comber that sets a movement curve (31) for a detaching roller (16,17). The detaching roller movement setting device includes a computing unit and an input unit. The computing unit sets the movement curve as a curve gradually plotted along eight points, which are an origin point (P0) , first distinctive point (S1), second distinctive point (S2), third distinctive point (S3), fourth distinctive point (S4), first auxiliary point, second auxiliary point, and third auxiliary point. The input unit inputs to the computing unit at least the first, second, third, and fourth distinctive points.