How Does a Sewing Machine Inside

How works the sewing machine and what does it have inside? About it well knows every technician but you can find out about this and see as your machine is arranged using read this article.
In this post you can see how works this mechanism and to see all its internal parts.
Entry-level model of sewing machines

To demonstrate some internal parts and devices we chose a simple model of sewing machines Janome with vertical oscillating shuttle hook system.

Most of old sewing machines and some inexpensive modern models have such vertical oscillating shuttle hook system.
Its advantages and disadvantages are well described in other articles of the site, for example: How to choose your first sewing machine.
What is under needle plate

Note: Full disassembling a sewing machine at home is not desirable. Trying taking a peek inside your new sewing machine will void a warranty and to fail of complex electronic devices.
But, you can to remove a needle plate boldly and this should be done periodically.

For what it is necessary to do? With time under the needle plate can be accumulate dirt, dust, lint and others.
Take a middle size flat screwdriver and remove two screws.
Now you can clean thoroughly this area with brush. Read more here: How to clean and oil a sewing machine.
Note: Some models of sewing machines have another type of shuttle hook device.
Internal parts of sewing machine

Now let's take a look inside. But first you need to remove two plastic covers covering internal parts of sewing machine.

Sewing machine's outer casing has two halves like a nut shell.

When you can to open the "nut shell" you find a lot of metal details and electronic boards.

If you could get inside your entry-level sewing machine you need lubricate all rotating and moving metal components (joints, bushings).
Sewing machine electric motor

This strap (drive belt) connects the electric motor with main shaft of the sewing machine.

So looks reverse stitch lever on inside, without plastic outer housing.

Such a device for switching the types of stitches (stitch selector) has only mechanical household models of entry level sewing machines.
Electronic models or computerized sewing machines have electronic control boards only.

So looks a thread tension assembly on inside sewing machine.

A front cover you can remove at home also. Ander this cover you find a lot of joints that need to be lubricated periodically.

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