Patterned Fabric Piece Layout for Pitch Variation and Overlap Control
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Solution Overview
Problem
Existing methods for automatic cutting of patterned fabrics face challenges in maintaining pattern continuity and efficiency due to discrepancies between theoretical and actual fabric pitches, leading to potential overlaps and increased material loss.
Innovation Solution
A method for placing parts to be cut on a fabric with a repeating pattern, which involves calculating a variable margin based on the fabric's rate of variation and predetermined constraints to avoid overlaps, ensuring accurate placement and minimizing material loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a fixed margin is used for placing pieces on patterned fabric, then the placement process is simple, but overlaps between adjacent pieces occur due to fabric pitch variations
Solution Approach 1:
The patent transforms the static fixed margin into a dynamic variable margin that adapts to each piece's position and orientation on the fabric. The margin is calculated based on the piece's coordinates and the fabric's pitch variation rate, allowing the system to maintain precision while accommodating fabric irregularities automatically.
Solution Approach 2:
The patent changes the margin parameter from a constant value to a variable value that depends on the piece's location and the fabric's pitch characteristics. By calculating the margin as a function of position coordinates and pitch variation rate, the system optimizes placement accuracy without complicating the overall process.
2Manufacturing precision
If a large fixed margin is applied to avoid overlaps, then placement accuracy is improved, but material loss increases
Solution Approach 1:
The patent applies different margin values to different pieces based on their specific location and orientation on the fabric. Instead of using a uniform large margin everywhere, the system calculates the minimum necessary margin for each piece, thereby maintaining placement accuracy while minimizing unnecessary material waste in regions where less margin is needed.
3Reliability
If the theoretical placement is modified to correct pitch discrepancies, then pattern continuity is maintained, but the risk of overlaps between pieces increases
Solution Approach 1:
The patent modifies the placement parameters by introducing a variable margin that compensates for pitch variations while preventing overlaps. The margin is calculated using the piece's coordinates and the fabric's pitch variation rate, allowing the system to maintain pattern continuity through coordinate adjustments while the variable margin acts as a safety buffer against overlaps.
4Manufacturing precision
If absolute position markers are used for each piece, then pattern alignment is improved, but the complexity of the placement system increases
Solution Approach 1:
The patent makes the variable margin calculation serve multiple functions: it simultaneously maintains pattern alignment, prevents overlaps, and adapts to different piece positions and orientations. This multi-functional approach eliminates the need for separate absolute position markers for each piece, as the margin calculation inherently handles all alignment requirements.
Data Source
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AI summary
Method for laying out pieces to be cut automatically into a patterned fabric The invention relates to a method for laying out pieces (P) to be cut automatically into a fabric having a repetitive pattern with a predetermined pitch, referred to as the pattern pitch, the method comprising the steps of: - determining a list of pieces to be laid out on the fabric, - for at least one piece in the layout, calculating an outline to be placed (Cp) around the piece, the outline comprising a variable margin in order to avoid overlapping between adjacent pieces, the margin being dependent on a predefined rate of variation in the fabric and on at least one predetermined constraint for the layout of the piece on the fabric, and - preparing a theoretical layout of the pieces on the fabric taking into account the outline to be placed around each piece.