What's inside Sewing Electric Motor and Repair Tips
Let's look what is inside the sewing electric motor. These photos help you understand how to clean and fix an electric motor of home sewing machine.
Note: Industrial sewing machines do not use such motors.
First, it should be noted that this type of motors is used on older models of sewing machines. Current models of sewing machines are equipped with electric motors that are located inside the sewing machine shell.
This is the type of sewing machine motor that can easy to replace. The motor is attached directly to the body of the sewing machine with a single screw. This type of electric drive is used for older sewing machines.
With these screws the engine is mounted to the support. The mount having two screws allows you adjust the belt tension.
Remove the bracket from the motor housing at first.
If you will unscrew this screw you will be able to remove a pulley.
Note: The pulley is removed with effort.
The pulley can be made from metal or plastic.
Now let's look inside the motor housing. The shell of sewing machine motor has two parts that a fixed together by four screws.
Unscrew the screws with flat screwdriver and remove them.
View from above.
At this photo is shown the commutator bar (the armature) of electric motor. Its surface should not have any dirt and scratches.
If the motor does not work, check these contacts.
Checking the integrity of wire windings is possible only by using a special device.
The axis a motor has two bearings that should be lubricated with a few oil drops.
Pour here two or three drops of oil, no more.
On the opposite side of electric motor also needed add two or three drops of oil.
Copper wire windings must have a clean bright look.
Such sewing electric motor has two carbon brushes.
To remove these graffiti brushes you need straighten this plate first.
Be careful, inside is a spring and carbon brushes can "jump out".
These springs press the carbon brush closer to the commutator bar.
The surface of the commutator bar (the armature) must be clean and smooth.
Clean this surface you can using usual paper only.
Note: Never use the abrasive materials.
English isn't my first language, so please excuse any mistakes and help correct them.
E-mail for sending is on the contact page.
Related Tutorials and Tips :
Clutch Motor of Industrial Sewing Machine
The industrial sewing machines have special clutch motor at which the machine is able to work 24 hours a day without interruption and at a high speed.
Sewing Machine Foot Control Pedal - Repair Tips
Look what is inside the sewing machine foot control. These photos help you understand how to fix a foot control pedal.
How a Sewing Machine Works
Learn how to construct and work a sewing machine. Here is home model of the zigzag sewing machine.
Vertical Rotary Shuttle Hook System
Sewing machines middle and upper class have a rotary vertical or horizontal hook system. Here you can read how works vertical rotary hook and tips for repair.
Tips For Choosing A Sewing Machine
How to choose your first sewing machine? A few key features of sewing machines you need to know necessarily.
Bobbin and Top Thread Problems
If your sewing machine keeps breaking top or bobbins thread this tutorial help you troubleshoot these problems.
How to Make an Inverted Pleat Skirt
If you will make a skirt and you want add the pleats use this tutorial. These steps help you learn how to make the inverted pleat.
Rolled Hem Presser Foot Tutorial
Using the rolled hem presser foot is the simple way how to hem thin fabrics. The tutorial has 10 photos with pro comments.