I can’t get my head around how a sewing machine sews a hem on material when it just a needle with some thread poked through it stabbing the material in a line. How does that then make the thread loop back under the material to create a hem on both sides?
In: Engineering
This is a difficult thing to describe over writing, and there are many helpful youtube videos showing the inner workings of a sewing machine in slow motion, with descriptions. I recommend checking those out.
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