Seam Profile Position Control for Patterned Sewing Materials
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Solution Overview
Problem
Existing sewing technologies fail to achieve precise control of seam contours relative to structures on sewing materials, especially with materials like leather with perforated patterns, due to inhomogeneous properties, leading to inaccurate and non-reproducible sewing.
Innovation Solution
A method that adapts a sewing program by comparing reference and working sewing materials' structure data sets, allowing for precise position control by recording and generating reference and working structure data sets, and adjusting parameters based on deviations such as displacement, size, and angular differences, using a camera system and programmable control unit to ensure accurate seam placement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional sewing devices with basic camera recording are used, then the device complexity is low, but the manufacturing precision of seam position relative to structure is insufficient
Solution Approach 1:
The system performs preliminary recording of structure positions on the working sewing material before sewing begins. Reference structure data sets are created in advance by recording positions of structures on a reference material, then comparing these with actual working material structures to pre-calculate correction values that are applied to the sewing program before execution
Solution Approach 2:
The system records the actual positions of structures on the working sewing material using a camera, compares these recorded positions with the reference structure data sets, and uses the detected deviations to automatically correct the sewing program parameters. This closed-loop feedback ensures high precision seam positioning despite material inhomogeneities
2Manufacturing precision
If detailed structure recording and comparison is performed, then the manufacturing precision improves, but the loss of time increases due to data processing
Solution Approach 1:
The system extracts only the essential structure position data from the recorded images - specifically the coordinates of structure points - rather than processing entire images. This extraction of key positional information maintains precision while significantly reducing data processing time and computational requirements
Solution Approach 2:
The system records positions of multiple structures across the material, but focuses processing on the specific structures that are relevant to the seam path. Not all recorded structure data needs to be processed in full detail, only those affecting the seam position accuracy require correction calculations
Data Source
AI summary
The present disclosure relates to a method for controlling the position of a seam contour and a device for carrying out the method, wherein the position control of a seam contour relative to structures of a sewing material is based on comparison data of a structure of a reference sewing material and a structure of a working sewing material.