Sewing Machine Embroidery Pattern Positioning and Scaling
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Solution Overview
Problem
Existing sewing machine technologies require manual and time-consuming adjustments for placing, orienting, and scaling embroidery patterns on fabric, especially when the starting point is difficult to select or lies outside embroidered areas, and retensioning is necessary for large or complex designs.
Innovation Solution
The sewing machine allows operators to select significant points in the embroidery pattern for automatic adjustment of position, size, and rotation using two modes: mode1, where corners or boundary lines are used for precise placement, and mode2, where stitches are chosen as pattern points for alignment and scaling, enabling easy fitting within fabric constraints.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual adjustment is used for placing and orienting embroidery patterns, then the operator can position the pattern, but the process becomes time-consuming and requires multiple stages with small changes
Solution Approach 1:
The patent replaces manual mechanical adjustment with an automated computer-controlled system. The control program automatically calculates and executes the positioning, orientation, and scaling of embroidery patterns based on selected reference points, eliminating the need for manual stage-by-stage adjustment and significantly reducing positioning time.
Solution Approach 2:
The system performs preliminary calculations and preparations for pattern placement. By pre-defining reference points in the pattern and pre-calculating transformation parameters (position, orientation, scale), the system prepares all necessary data before actual embroidery execution, avoiding time-consuming adjustments during the embroidery process.
2Area of stationary object
If the fabric is retensioned on the frame between operations, then large embroideries can be produced, but the pattern positioning and alignment becomes complex and time-consuming
Solution Approach 1:
The system uses reference points marked on the fabric as feedback elements. After fabric retensioning, the operator identifies these pre-placed reference points, and the control program uses them to automatically recalculate and adjust pattern positioning. This feedback mechanism simplifies the complex task of repositioning patterns on retensioned fabric by providing clear alignment targets.
Solution Approach 2:
The system creates a digital copy or representation of the pattern with defined reference points. This digital model allows the control program to calculate transformations and predict positioning requirements before actual embroidery, simplifying the coordination between multiple fabric retensioning operations and pattern placement.
3Adaptability or versatility
If the starting point for embroidery is fixed in the stored pattern, then the pattern can be executed, but the operator cannot freely select the starting point or easily adjust orientation and size
Solution Approach 1:
The system transforms the static, fixed starting point concept into a dynamic, selectable system. Multiple reference points are defined in the stored pattern, and the operator can dynamically select which point serves as the starting point based on the specific embroidery application. The control program then dynamically calculates the appropriate transformations based on this selection.
Solution Approach 2:
The pattern storage system is designed to be universal by incorporating multiple reference points that can serve different functions. The same pattern can be embroidered with different starting points, orientations, and scales by simply changing which reference point is selected and how it is mapped to fabric reference points, making the system adaptable to various embroidery requirements without requiring multiple pattern versions.
Data Source
AI summary
A method and an arrangement for placing an embroidery in the desired position on a sewing material for embroidering on a sewing machine which has a memory for embroidery elements and a processor for reading stitch data for a selected embroidery element and for manoeuvring the sewing machine to execute stitches associated with the selected embroidery element on the sewing material, in which pattern points are assigned to the embroidery element and registered in the processor, and in which fabric points are marked on the sewing material at points where corresponding pattern points are to be located when embroidering, the sewing machine processor automatically orienting and scaling executed patterns of the embroidery element on the sewing material.