The light on a sewing machine helps you see what you're sewing with ease. When sewing, precision and details are essential, so being able to clearly see the needle, thread, stitches, and details are necessary.
its in the left
It actually has no on/off switch and no light on it. You only need to plug it in and push the foot pedal to start sewing.
The power switch is usually located on the side of the machine, and turns it off and on.
Sewing machine light,presser foor lever,threadscutter
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theory of sewing machine
It doesn't have one. A lot of sewing machines don't have on/off switches apart for working the light. The foot pedal usually disconnects the power when not pressed but this can not be relied on. Therefore you should never leave a sewing machine plugged in when not in use. Often the early models have a suppression capacitor in the foot pedal that can go short circuit making the machine run on its own.
The bulb on the sewing machine is simply for an extra boost of light. Because sewing involves small details - needles, thread, stitches, fine edges, etc. - a small lamp is focused on the work area to help you better see the stitching.
sewing machine:) A sewing machine uses thread to fasten fabric together. A sowing machine plants seeds.
what is the function of the head of the sewing machine