Sewing Data Editing Device Corner Stitch Control
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Solution Overview
Problem
Sewing machines often fail to securely attach a cord member to sewing objects at corner portions of patterns during the couching process, leading to detachment and an unattractive appearance.
Innovation Solution
A sewing data editing device that detects corner portions in a pattern and edits sewing data using different conditions for needle drop points at corners and non-corners, ensuring secure attachment by adjusting stitch pitch and width accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the same editing conditions are used for all needle drop points in the pattern, then the device complexity is reduced and operation is simplified, but the cord member becomes detached at corner portions
Solution Approach 1:
The patent applies local quality by implementing different editing conditions specifically for corner portions versus non-corner portions of the pattern. The control portion detects corner portions and applies distinct stitch pitch and stitch width settings only to those specific locations, rather than uniformly across the entire pattern. This localized approach improves attachment reliability at corners without unnecessarily complicating the overall system.
Solution Approach 2:
The patent segments the pattern into corner portions and non-corner portions based on geometric angle detection. By dividing the sewing path into these distinct segments and applying different editing conditions to each segment, the system achieves reliable cord attachment at critical corner areas while maintaining simple operation for the remaining portions.
2Reliability
If the stitch pitch and stitch width are adjusted for corner portions, then the cord member attachment is improved, but the manufacturing process becomes more complex
Solution Approach 1:
The control portion automatically detects corner portions based on the geometric angle between adjacent line segments and self-adjusts the stitch pitch and stitch width without requiring manual intervention. This self-service capability improves cord attachment at corners while keeping the manufacturing process simple, as the system autonomously handles the complexity of differential editing conditions.
Solution Approach 2:
The patent changes key sewing parameters (stitch pitch and stitch width) specifically for corner portions detected through angle calculation. By dynamically adjusting these parameters based on local geometric conditions rather than using fixed values throughout, the system achieves reliable attachment without requiring complex manual programming of each sewing location.
3Productivity
If uniform sewing conditions are applied throughout the pattern, then the operation is simpler and faster, but the appearance quality deteriorates at corner portions
Solution Approach 1:
The patent maintains high sewing operation efficiency by applying uniform editing conditions to non-corner portions while implementing localized quality improvements only at corner portions. This selective approach ensures attractive appearance at critical corner areas without significantly impacting overall productivity, as the majority of the pattern uses standard sewing parameters.
Solution Approach 2:
The patent applies enhanced editing conditions partially only where needed (corner portions) rather than excessively throughout the entire pattern. This partial action approach improves manufacturing precision at critical locations while maintaining productivity, as the system avoids unnecessary parameter adjustments in areas where uniform conditions are sufficient.
Data Source
AI summary
A sewing data editing device includes a processor and a memory configured to store computer-readable instructions that, when executed by the processor, instruct the processor to perform processes. The processes include acquisition processing of acquiring coordinate data representing a position of each of a plurality of points along a predetermined pattern, corner portion detection processing of detecting, based on the coordinate data, a corner portion having an angle smaller than a predetermined angle, and editing processing of editing sewing data, based on the coordinate data of each of the plurality of points and on a detection result of the corner portion detection processing, using editing conditions that are mutually different for a plurality of first needle drop points corresponding to the corner portion and for a plurality of second needle drop points corresponding to a non-corner portion not detected as the corner portion, in the predetermined pattern.