Sewing Machine Foot Control Pedal - Repair Tips

Sewing Machine Foot Control Pedal - Repair Tips

Look what is inside the sewing machine a foot control. These photos help you understand how to use and repair the foot control pedal.

Sewing Machine Foot Control Pedal, view 1

In this article I'll show you two types of sewing machine foot control pedals. First type is a modern model controller of computerized sewing machine.
In the second half of this post you will see what is inside the foot control pedal of old sewing machines or modern budget models machines, having oscillating shuttle hook system.

Sewing Machine Foot Control Pedal, view 2

Never open the electrical appliances themselves. It can do experts only. But if you're curious, you can look at what is inside the pedal using my photos.

Sewing Machine Foot Control Pedal, view 3

Inside you will find not too many details. Inside the controller is one rheostat.

Sewing Machine Foot Control Pedal, view 4

This is a very reliable type of pedal. If your sewing machine is running in spurts, that probably is wiped out two tracks of resistor.

Sewing Machine Foot Control Pedal, view 5

If you are removed the cover of sewing foot pedal it's desirable to lubricate the internal friction locations and joints with a few oil drops.

Sewing Machine Foot Control Pedal, view 6

This is the connector for joining the pedal to the sewing machine.

Sewing Machine Foot Control Pedal, view 7

The power supply cord is connected separately.

Sewing Machine Foot Control Pedal, view 8

Now, you will see what is inside a foot control pedal of old sewing machines or most budget models machines.

Sewing Machine Foot Control Pedal, view 9

This is controller of old model Juki sewing machine made in Japan.

Sewing Machine Foot Control Pedal, view 10

To remove the cover you need unscrew only one screw.

Sewing Machine Foot Control Pedal, view 11

Inside you will find a ceramic case.

Sewing Machine Foot Control Pedal, view 12

Inside this ceramic block is placed a lot of thin graphite plates. A wedge presses down the plate that compresses all graphite wafers into the rheostat together. The more they are compressed to each other the faster the rotating electric motor of the sewing machine.

Sewing Machine Foot Control Pedal, view 13

If you remove the screw and pull of this plate, you can see these rheostat graphite wafers.
Remove it is needed if the foot control requires too much pressure to get up to speed.

Sewing Machine Foot Control Pedal, view 14

On this photo shows a device of another sewing foot control pedal, but the graphite plates are identical.

Sewing Machine Foot Control Pedal, view 15

After years of work these plates are burned out or covered by a touch, which prevents good contact between them. In some circumstances you can repair the pedal if you can remove carbon deposits.
But keep in mind that these graphite circles are very fragile. Besides, keep in mind that repairing electrical appliances should be done by specialist only.

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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