How a Sewing Machine Works

How a Sewing Machine Works

Learn how works a sewing machine. These knowing will be help you correct use the sewing machine and even fix it in some cases.

Learn how works your sewing machine. Knowledge of working a sewing machine helps you not only to sew correctly but and save money on repairs.

There are several types of sewing machines having different device of shuttle hook system. Here is home model of the zigzag sewing machine that has the vertical oscillating shuttle hook system.
Go this link if you want learn how work the industrial sewing machines.

How to adjust the height of the feed dog

For different types of fabrics is needed adjust the height of the feed dog teeth. This is done using this handle (for this model of sewing machine).

The metal parts that must be lubricated

In the bottom of the sewing machine are metal parts that must be lubricated.

The metal gears should be lubricated with special grease

The metal gears should be lubricated with a special grease.

The driver of vertical oscillating shuttle hook

This is the driver of vertical oscillating shuttle hook.
The flat spring of driver must have the gap size about 1 - 1.5 mm.

The surface of the shuttle

The surface of the shuttle must be perfectly smooth and not have any dents or rust areas.
The tip of the shuttle hook should be sharp.

The tip of the shuttle hook should pass above the eye of the needle

The tip of the shuttle hook should pass above the eye of the needle by 1.5 - 2 mm, as shown on photo.

The hook tip should pass along the needle as close as possible

At the same time the tip of the shuttle hook should pass along the needle, as close as possible - 0.15 mm.

To approach or move away the tip of the hook from the needle you need to loosen these two screws. Then you can rotate the shuttle assemble along its axis.
Note: Other models of sewing machines can have another way of adjusting this clearance.

Oil all mechanisms under covers

Remove all covers from sewing machine. Oil all mechanisms under covers. After oiling the sewing machine it will be works quietly and gently.

The block for the formation of the zigzag stitch

The block of the zigzag stitch formation.

The screw of presses needle bar

Remove the front cover and oil all joints and mechanisms.
The screw (P) presses needle bar. The screw (T) clamps the thread tensions assemble.

Any thread tension assembly must have such wire hook

Any thread tension assembly must have such wire hook.

The reverse lever and knob of length stitch

The reverse lever and knob of selection the length stitch.

Screw for fixing the electric motor of the sewing machine

Screw for fixing the electric motor to the body a sewing machine.

The belt tension of the electric motor

The belt tension of the electric motor can be controlled in two ways. Using this screw that holds the electric motor to the body a sewing machine. The belt tension can be controlled using these two screws also.

The foot control of sewing machine

Here is the foot control of sewing machine.

How a Sewing Machine Works, photo 16

Repair it yourself is not allowed. But if you're wondering how works not only sewing machine but and the foot control pedal you can read in another articles.

English isn't my first language, so please excuse any mistakes and help correct them.
E-mail for sending is on the contact page.

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