Sewing Machine Showroom in Anna Nagar - VS Sewing Machine
A sewing machine is, obviously enough, "a machine that sews,"
but if you think about those words literally, it can help you figure
out how it works. Let's say we had a big construction set with
standard, snap-together, engineering components in it; which bits
would we need to make a sewing machine? The answer is surprisingly
few. Although you can still find the odd hand-powered sewing machine
(and you can operate any machine slowly by hand if you want to for
slow, precision work), virtually all modern sewing machines are
electric: they're built around quite hefty
electric motors (roughly
the same size as the ones you find in vacuum cleaners and lawn
mowers). Pushing a tiny little needle up and down through multiple
layers of thick fabric is hard work; and lifting and feeding the
fabric takes effort as well. If you've ever sewn something like a
pair of curtains, you'll know it can be quite exhausting
turning and moving the fabric, but a sewing machine helps you do that
job as well. more details
The beating "heart" of a sewing machine is the electric motor, which is hidden inside the main stem of the machine usually quite near to the place where you plug in the power cord. The motor drives three separate mechanisms that are very carefully timed to cooperate with one another. Two of them, a mixture of cams and cranks, operate the feed dog, that little set of teeth that pop up and down just beneath the needle and the presser foot (which holds the material in place); one pushes upward against the material (to grip it) and the other moves it forward by an adjustable amount (to make stitches of varying length). It's actually a rather neat double-act: one of these mechanisms makes the feed dog go up and down, while the other slides it back and forth. Meanwhile, another crankshaft driven by the motor makes the needle rise up and down, while the fourth and final mechanism turns the shuttle and hook attached to it that makes the stitches. view details
No comments:
Post a Comment