Sewing Store Details
In the last section, we looked at the machinery inside a conventional electric sewing machine. One important addition to this basic design is the ability to sew different sorts of stitches. The typical stitch options for a conventional sewing machine are variations on the zig-zag stitch. The zig-zag stitch is exactly what it sounds like: a stich with a jagged line.
This zig-zag stitch is fairly simple to achieve. All you have to do is move the needle assembly from side to side at the same time that it is moving up and down. In a conventional electric machine, the needle bar is attached to an additional linkage, which is moved by a cam on the main drive shaft. When the linkage is engaged, the rotating cam shifts the linkage from side to side. The linkage tilts the needle bar back and forth horizontally in synch with the up and down motion.
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Sewing Store
Sewing Store
Sewing Store
Sewing Store
Sewing Store
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Sewing Store
Sewing Store
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