Fabric-Sensing Sewing Machine Control for Uniform Stitching
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Solution Overview
Problem
Sewing, embroidery, or quilting machines often produce impaired results due to irregularities in textile fabrics, such as weaving defects or uneven movement, which are not effectively addressed by existing technologies.
Innovation Solution
A sewing machine equipped with a detector module that senses fabric properties and conditions, adjusting its operating mode to compensate for irregularities, including a control unit to adapt stitch frequency and stop the machine as needed, using electromagnetic signals and beam deflection to detect fabric structure and movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a textile fabric is moved through the sewing machine at high speed, then productivity is improved, but fabric irregularities such as uneven speed, wrinkling, and wavy deformation occur, worsening manufacturing precision
Solution Approach 1:
The detector module detects fabric irregularities (wrinkles, waves, defects) before they reach the needle area, allowing the control unit to preemptively adjust operating parameters such as needle position, stitch frequency, or machine speed to prevent defective stitches, thereby maintaining both high productivity and stitch uniformity
Solution Approach 2:
The detector module continuously monitors fabric properties and provides real-time feedback to the control unit, which adjusts sewing parameters dynamically based on detected fabric conditions, ensuring consistent stitch quality even at high speeds where fabric irregularities are more likely to occur
2Device complexity
If the machine operates without detection and adaptation capabilities, then device complexity is reduced, but the ability to compensate for fabric irregularities is lost, worsening reliability
Solution Approach 1:
The detector module and control unit are integrated into the machine structure, performing detection and adaptation in advance before irregularities affect stitch quality, thereby ensuring reliable sewing results without requiring overly complex external correction systems
Solution Approach 2:
The machine performs self-diagnosis and self-correction by detecting fabric irregularities and automatically adjusting its operating parameters, eliminating the need for constant manual intervention or complex external monitoring systems, thus maintaining reliability with moderate complexity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively reduces impairments in sewing, embroidery, or quilting by ensuring uniform stitch length and quality despite fabric irregularities, enhancing user experience and product consistency.
Implementation Method 1
an E/M source (EMQ) that can emit an electromagnetic forward signal (S1) which can pass through the stitch plate (SP) at a first passage area (DB1) of the stitch plate (SP)
Implementation Method 2
to generate an electromagnetic return signal (S2) reflected or scattered from the bottom side of the moving planar sub-area (T1) of the textile structure (T)
Data Source
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AI summary
The invention relates to a machine (M) for sewing, embroidery, or quilting, wherein a planar partial area (T1) of a textile structure (T) is pressed in a stretched state against a textile structure support area (TA) adjacent to a stitch plate (SP) and/or against the stitch plate (SP) and can be moved in a plane parallel to the stitch plate (SP) at a speed (v) relative to the stitch plate (SP), so that the planar partial area (T1) lies flat against the stitch plate (SP). The machine (M) includes a detector module (DM) with which a property and/or state of the moving planar partial area (T1) of the textile structure (T) can be detected, and a detector module control unit (SE1) with which an operating mode of the machine (M) can be adapted depending on the detected property or state of the moving planar partial area (T1) of the textile structure (T).