Sewing Machine Projection Control for Clear Stitching View
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Solution Overview
Problem
The marking light of a sewing machine remains on during sewing, obstructing the view and reducing workpiece positioning and sewing efficiency.
Innovation Solution
A sewing machine that includes a projector to project different images depending on whether sewing is performed, with a first image showing a planned sewing position and reference position during non-sewing periods, and a second image without the reference position during sewing, to improve positioning efficiency and reduce projected objects during sewing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the marking light remains on during sewing, then the reference position is continuously visible, but the viewing is obstructed and sewing efficiency is reduced
Solution Approach 1:
The marking light operates periodically rather than continuously - it is turned on during positioning operations and turned off during sewing operations. The controller automatically switches the marking light state based on the current operation phase, ensuring reference visibility when needed while eliminating obstruction during sewing.
2Productivity
If the marking light is turned off during sewing, then viewing is improved, but the reference position is no longer visible
Solution Approach 1:
The controller monitors the sewing machine's operational state and provides feedback control to the marking light. When the system detects that sewing is in progress, it automatically turns off the marking light. When positioning operations are detected, it turns the marking light back on, ensuring the reference position is visible only when actually needed.
3Ease of operation
If the marking light is always on, then the reference position is always visible for positioning, but it obstructs viewing during sewing
Solution Approach 1:
The marking light's operational state is made dynamic rather than static. The system automatically adjusts the marking light's on/off state based on the current operational phase detected by the controller, making the lighting system adaptive to different operational requirements without manual intervention.
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
Enhances workpiece positioning efficiency by projecting relevant objects only when not sewing and maintains sewing efficiency by minimizing projected objects during sewing, thus improving overall efficiency without loss of sewing performance.
Implementation Method 1
a marking light emits light to project a mark to a table as a reference position of a cloth placed on the table
Data Source
AI summary
A sewing machine includes a bed, a feed unit, a sewing unit, a projector, and a controller. The projector is configured to project a projection image to the bed. The controller is configured to, where the feed unit and the sewing unit do not perform sewing, execute a first control in which the controller causes the projector to project a first image to the bed, the first image including a first object and a second object, the first object indicating a planned sewing position, the second object indicating a reference position to position the workpiece. The controller is configured to, where the feed unit and the sewing unit perform sewing, execute a second control in which the controller causes the projector to project a second image to the bed, the second image including the first object and not including the second object.