Sewing machine pedals: device and repair

For many, the sewing machine is not only an assistant in the implementation of their creative ideas, but also a device that helps to cope with the overwhelming daily monotonous work of a seamstress. In order for this work to go smoothly, you need to make sure that all the parts of the machine are serviceable, especially the pedal.

The layout of the pedal for the sewing machine is most often very simple. This is especially true for the part in which electronic parts are completely absent. Most often they are with foot electric cars. Call them pedals rheostat type. Such a pedal consists of one part - a rheostat, which has a large number of graphite plates adjacent to each other very tightly. It acts as a switch or switch on the electrical drive of the machine.

Unlike conventional switches, pedals with a wire rheostat smoothly and gradually turn the sewing machine on and off.

If the graphite plates are in a free state, their resistance to electric current will be too large. In this case, the current will not pass through the graphite plates stacked together, which means that the motor will not rotate.

But the plates should be squeezed for at least a few minutes, their resistance will decrease in the same second.

If we consider household sewing machines, then the pedal to the electric drive can go electronic and rheostatic. Distinguishing them is easy and simple. The resistive pedal will be much heavier in weight than the electronic pedal. It depends on whether the case is made of metal or hard plastic, which does not undergo deformation during a sharp temperature drop. In addition, a metal pedal can last much longer in a sewing machine than a plastic one. After all, if a heavy object falls on it, it will remain intact.

Inside such a pedal there is a large number of graphite plates, quite tightly adjacent to each other. However, after a certain period of time from the fact that the plates constantly interact with each other, their destruction can occur. Most often, this happens with those craftswomen who use a sewing machine daily. In this case worn parts must be replaced with new ones. And since this is impossible to do, then you just need to purchase another rheostat.

Unlike the rheostat pedal, the electronic pedal has virtually no weight. After all, its filling is various microcircuits and radio components. You can adjust these pedals by changing the current value or by changing the frequency of the voltage pulses that are supplied to the electric motor.

It is found in models such as "Podolsk" or Singer. Of course, in terms of use, it is very inconvenient; many find it easier to work with her toe rather than toes. However this in itself quite reliable pedal. Many consider her simply not to be killed. Inside it, the wiring cannot break, the graphite plates cannot burn out, and as for the case itself, not a single person can break it. Therefore, those who saw it in the kit for their sewing machine, need to rejoice. After all she will be able to serve her masters longer than the machine itself.

If the pedal of the sewing machine breaks down, it is necessary to determine which type it belongs to. If the electric pedal of the sewing machine is rheostatic, it can either be adjusted or repaired.

Those who have a sewing machine supplemented with such a detail as an electronic pedal need to stop their work for a while. After all, in the event of a breakdown, you will need to consult a specialist. For its repair, special equipment is needed, as well as at least minimal knowledge in such areas as electronics.

Among other things, the pedal of the sewing machine also serves to adjust the sewing speed. Modern sewing machines can be adjusted in 2 ways.

• a special regulator mounted on the body of the sewing machine. It is especially important in cases where a child often works behind a typewriter. In this case, you can set the controller to the lowest speed.
• Pedal. The sewing speed will depend on how hard you press it. You can also adjust the idle of the pedal itself and a smooth change in speed. On some cars, the pedal is equipped with a mode switch. In this case, at too difficult places you can choose a low speed.

There are many different causes for a broken pedal on a sewing machine. However, this does not mean that in each case it will be necessary to carry out repair work. First you need to make sure that it was the pedal that broke, and not some other detail.

First you need to check the health of the motor. To do this, you must directly connect the cord from the outlet to it.If the cause of the breakdown is not the motor, then you need to see what type of pedal the sewing machine has. In the event that it is electric, it will be possible to proceed with its repair. It is not possible to repair the electronic pedal yourself. It is worth familiarizing yourself with the most common causes of its breakdown.

• In case of oxidation of the contacts in the pedal itself or in the plug, it will be enough to simply clean them and then restore them. Then the sewing machine will work again. This can be done using ordinary sandpaper, which will not be able to damage them during cleaning.

• Quite often, the electrical circuit breaks inside the insulating cord. This happens as a result of a careless attitude to the connecting wires that go to the pedal. For example, if you often pull the cord out of the socket and without reason, while pulling it by the cord, and not by the plug, the machine may break. In addition, very often heavy objects fall on the cord or the leg of a chair falls. In this case, you just need to replace the wire.

• Another reason for the malfunction of the sewing machine is burnout, as well as the replacement of graphite plates. The first sign of such a breakdown is considered to be a decrease in the speed of the electric drive of the sewing machine. In addition, when you press the pedal, the electric motor responds too weakly. The machine starts sewing only a couple of seconds after pressing the pedal, and not immediately. If you open the lid and look at the graphite plates, you can see only black dust. In this case, they must be replaced with new ones. However, in the store it will be impossible to purchase them. In addition, it is also impossible to file them with a hacksaw. After all, the thickness of one plate is only 0.2 millimeters.

• Most often rheostatic the pedal of the sewing machine is made of heat-resistant plastic, which differs from other materials in its fragility. Therefore, if it falls on a plastic pedal of heavy objects or if it accidentally falls to the floor, it may break. In this case, some seamstresses try to glue it with high-quality glue. However, the pedal of an electric sewing machine has the property of heating, which makes the glue soften during long work and the parts that were connected to it become fragile. Therefore, when you press the pedal with your foot, it can simply fall apart, and in some cases even shock the seamstress. Therefore, it is better to replace it with a new one.

• In electronic sewing machines, you can also notice that such an important detail as the pedal does not work. However, a malfunction can only be detected using special devices. Quite often, the microcircuit breaks down or the thyristor is simply faulty. In this case, the parts must be replaced with new ones. This is best done in specialized centers where the masters, after examining the pedals, will say their verdict. However, some experienced craftsmen who have little skills in working with electronic equipment try to do it themselves.

In addition, each seamstress should know several rules for using a sewing machine. Primarily, after the repair is completed, especially if it was done on its own, do not leave the sewing pedal on for a long time. Besides, don't leave her unattendeduntil the seamstress is convinced of its full serviceability. In any case, when the seamstress takes her foot off the pedal, to the electric motor in no case should current flow, especially at the output contacts going to the plug.Indeed, in this case, there is a complete separation of the electrical circuit.

To summarize, we can say that such a detail as the pedal of the sewing machine is quite important. After all, the machine itself would not work without it. Therefore, in the event of a malfunction, you must quickly run to the master or solve the problem yourself. Otherwise, the operation will stall for a long time.

.

Sewing machine pedal repair is shown in the video.