Adjustable Cutting Needle Alignment for Sewing Machine Cut Quality
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Solution Overview
Problem
Existing sewing machines with fixed cutting needle blade directions often result in rough cuts when forming patterns on work cloths, as the cutting line segments do not align with the blade directions, leading to suboptimal cut quality.
Innovation Solution
An apparatus and method that calculates and adjusts the rotation angle of cutting needles to minimize the angular difference between cutting line segments and blade directions, generating cutting data for multi-needle or lock stitch sewing machines to ensure precise alignment and smoother cuts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If cutting needles with fixed blade directions are used, then the sewing machine structure is simple, but the cut quality becomes rough when the cutting line segment direction does not align with the blade direction
Solution Approach 1:
The patent makes the cutting needle blade direction adjustable rather than fixed. The blade direction adjusting mechanism allows the cutting needle to rotate and align its blade direction with the cutting line segment direction dynamically, resolving the contradiction between simple structure and cut quality by introducing controlled adjustability only where needed.
Solution Approach 2:
The patent changes the parameter of blade direction from fixed to adjustable. By providing a blade direction adjusting mechanism that can rotate the cutting needle to different angles, the system can optimize the blade direction parameter to match the cutting line segment direction, thereby improving cut quality without requiring complete structural redesign.
2Manufacturing precision
If the blade direction of cutting needles is fixed, then the device structure is simple, but the alignment between cutting line segments and blade directions is poor, resulting in rough cuts
Solution Approach 1:
The cutting needle assembly is made dynamically adjustable through the blade direction adjusting mechanism. This mechanism enables the cutting needle to rotate and adapt its blade direction to match different cutting line segment directions, achieving precise alignment while maintaining relatively simple overall device structure.
Solution Approach 2:
The blade direction adjusting mechanism provides multi-functionality by enabling a single cutting needle to operate at multiple blade directions. This universal adjustment capability allows the same cutting needle to align with various cutting line segment directions, improving alignment precision without requiring multiple specialized needles or complex mechanisms.
Data Source
AI summary
An apparatus includes a processor and a memory. The memory is configured to store computer-readable instructions that, when executed, cause the processor to perform processes including acquiring a plurality of first needle drop points, acquiring a plurality of blade directions of a plurality of cutting needles, specifying a plurality of second needle drop points, calculating a first angular difference between a cutting line segment and a specific blade direction among the plurality of blade directions, specifying a specific rotation angle of the pattern, wherein the specific rotation angle is either a rotation angle of the pattern corresponding to the first angular difference which is smallest of the calculated first angular difference or a rotation angle of the pattern corresponding to the first angular difference which is equal to or smaller than a predetermined first threshold value, and generating cutting data.