Adjustable Stitch Width Sewing Machine Control
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Solution Overview
Problem
Existing sewing machines lack the ability to create complex sewing patterns with adjustable stitch widths, limiting design flexibility and precision in tapering and seam production.
Innovation Solution
A sewing machine and method that allow for adjustable stitch width during the sewing process, enabling users to predetermine and adjust parameters such as stitch length, maximum and minimum width, and apex locations, allowing for arbitrary combinations of increasing, decreasing, and constant stitch widths, and automatic calculation and storage of pattern data for precise reproduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a sewing machine uses predetermined stitch patterns with fixed amplitude and drive values, then the machine structure remains simple, but the design flexibility and manufacturing precision of sewing patterns are limited
Solution Approach 1:
The invention transforms the static, fixed stitch patterns into dynamic, adjustable parameters. The control unit allows real-time modification of amplitude values and drive values during the sewing process, enabling the stitch width to vary continuously according to predetermined functions or manual input, thus resolving the contradiction between design flexibility and machine complexity
Solution Approach 2:
The invention changes the fundamental parameters of the sewing system from fixed to variable. By allowing continuous adjustment of stitch amplitude and drive values through a control unit with programmable functions, the system achieves high adaptability while maintaining a relatively simple mechanical structure, as the complexity is shifted to the control software rather than mechanical components
2Manufacturing precision
If the stitch width is adjusted during the sewing process, then the manufacturing precision and design flexibility improve, but the device complexity increases due to additional control mechanisms
Solution Approach 1:
The invention replaces complex mechanical adjustment mechanisms with an electronic control system. The control unit programmatically adjusts the amplitude and drive values based on predetermined functions or user input, achieving precise stitch width control without requiring additional mechanical components, thus improving manufacturing precision while minimizing the increase in device complexity
Solution Approach 2:
The control unit serves multiple functions: it stores predetermined stitch patterns, calculates adjustable parameters based on various input methods (graphic input, function selection, manual entry), and executes the sewing control. This multi-functionality consolidates what would otherwise require separate mechanisms into a single integrated system, reducing overall device complexity while maintaining high precision
3Manufacturing precision
If complex pattern data is stored and processed, then the reproduction precision of intricate designs improves, but the loss of information increases due to the complexity of data management
Solution Approach 1:
The invention creates a digital copy of the sewing pattern in the form of programmable data stored in the control unit. This digital representation allows precise reproduction of complex patterns through software rather than physical templates or manual settings, eliminating information loss associated with physical pattern transfer and enabling exact replication of intricate designs
Solution Approach 2:
The control unit allows patterns to be predetermined and stored before the actual sewing process. Users can define complex patterns using graphic input means or select from predetermined functions, and the system calculates and stores all necessary amplitude and drive values in advance. This preliminary data preparation ensures that no information is lost during the sewing process, as all parameters are pre-calculated and ready for execution
Data Source
AI summary
A method and a sewing machine are provided to form sewing patterns allowing the stitching width to be changed during sewing for a flexible adjustment of parameters of the sewing pattern. In particular the stitch length a can be changed without changing the exterior design of the sewing pattern.