How a Sewing Machine Works
Knowing how works a sewing machine is important thing for those who use the sewing machine. Knowing how works a sewing machine help you to use your machine correctly. In some cases such information help you to fix and repair it yourself.
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.
For different types of fabrics need to adjust the height of the feed dog teeth. This is done using this handle (for this model of sewing machine).
In the bottom of the sewing machine are metal parts that must be lubricated.
The metal gears should be lubricated with special grease.
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 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 by 1.5 - 2 mm, as shown on photo.
At the same time the tip of the shuttle hook should pass along the needle, as close as possible - 0.15 mm.
To zoom in or remove the tip a hook from the needle you need to loosen the 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.
Remove all covers from sewing machine. Oil all mechanisms under covers. After oiling the sewing machine will work quietly and gently.
The block of the zigzag stitch formation.
Remove the front cover and oil all units and mechanisms.
First screw (P) presses needle bar. Second screw (T) clamps the thread tensions assemble.
Any thread tension assembly must have such wire hook.
The reverse lever and knob of length stitch.
Screw for fixing the electric motor of the sewing machine.
The belt tension of the electric motor can be controlled in two ways. Using this screw hold the electric motor. The belt tension can be controlled using these two screws also.
The foot control of sewing machine.
Repair it yourself is not allowed. But if you're wondering how works not only sewing machine but and the foot pedal read about it in another article.
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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