Guitar String Winding Tension Control for Uniform Wrap Wire
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Solution Overview
Problem
The existing methods for manufacturing guitar strings often result in defective wound strings due to inconsistent tension of the wrap wire, leading to compromised sound quality and increased defective rates, while also being inefficient in terms of productivity.
Innovation Solution
An apparatus comprising a table part, a holding part for rotating the core wire, a winding part for uniformly winding a second wire around the core wire, and a supply part with a height measuring and motor control system to maintain constant tension and precise height adjustments, ensuring uniform winding of the second wire around the first wire.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the wrap wire is supplied to the core wire to wind the wrap wire around the core, then the wound string is manufactured, but if the tension applied to the wrap wire is not constant, the manufactured wound string may be defective or its sound quality may be deteriorated
Solution Approach 1:
The patent implements a feedback control system where a sensor detects the tension of the wrap wire during winding, and this detection signal is fed back to a controller that adjusts the supply speed of the wrap wire to maintain constant tension. This closed-loop feedback mechanism ensures consistent winding quality and eliminates defects caused by tension variations.
Solution Approach 2:
The patent dynamically changes the supply speed parameter of the wrap wire based on real-time tension detection. By adjusting this critical parameter in response to actual conditions, the system maintains optimal tension throughout the winding process, ensuring both manufacturing precision and product reliability.
2Reliability
If the wrap wire is supplied to the core wire to wind the wrap wire around the core, then the wound string is manufactured, but if the tension applied to the wrap wire is not constant, the manufactured wound string may be defective or its sound quality may be deteriorated
Solution Approach 1:
The feedback control system continuously monitors wrap wire tension and adjusts supply speed accordingly, ensuring tension consistency that directly determines sound quality. The sensor-controller-actuator loop maintains optimal tension parameters throughout the winding process.
Solution Approach 2:
The system automatically self-regulates the wrap wire supply speed based on real-time tension conditions without external intervention. The control system serves itself by detecting tension deviations and independently adjusting parameters to maintain quality standards.
3Productivity
If conventional winding method is used, then the manufacturing process is simple, but the productivity is low due to inconsistent tension requiring rework
Solution Approach 1:
The feedback control system, while adding some complexity, actually improves productivity by eliminating defective products that would require rework. The automated tension control ensures first-pass quality, increasing overall manufacturing efficiency despite the added control mechanisms.
Solution Approach 2:
The patent replaces manual or simple mechanical winding control with an automated control system that uses sensors and controllers. This substitution of mechanical control with automated systems increases productivity through consistent, error-free operation while managing complexity through integration.
Data Source
AI summary
An apparatus for manufacturing a guitar string includes a table part; a holding part holds both ends of a first wire so that the first wire is rotatable; a winding part which is movable in a direction in which the first wire is extended, so that the winding part sequentially winds a second wire around on the outer surface of the first wire being rotated; and a supply part for supplying the second wire to the winding part, wherein the supply part includes a height measuring part; a first pulley part including a movable pulley and a movable body; a bobbin part around which the second wire has been wound; a motor part for rotating the bobbin part; and a control part which controls the speed of the second wire supplied to the winding part by controlling the operation of the motor part.