The awesome invention of the sewing machine has inspired creativity for over 150 years.
When Elias Howe invented the sewing machine in 1846, it was an amazing mechanical device driven by human power. The evolution of the sewing machine included foot power, hand power, and eventually electrical power.
The power system of the sewing machine in those days involved the use of levers, gear, belts, and wheels. The user would start the process either by hand or foot power, and the sewing machine would transfer that movement across the sewing machine to its various parts. This enabled the machine to move the needle, hook, and feed systems to generate sewing.
Electrical motors were eventually introduced, but doing so required a new wave of invention. The mechanical devices previously used were replaced by the electrical motor. It was necessary to convert the electrical energy from the motor to mechanical energy within the sewing machine. The result was the use of a belt to transfer the power to the upper shaft of the sewing machine.
Another revolution launched when the electric motor replaced the treadle or hand crank. Sewing quickly became faster, more reliable, and easier. The electric motor could run for hours without ever growing weary. It was common for existing machines to be retrofitted for use with electric motors. Treadle and hand cranks were removed and motors connected via a belt drive. Electricity was transformed into mechanical power.
The electrical motors are AC motors which means they operate on standard Alternating Current from your home outlet. The term alternating describes the flow of electricity first in one direction and then in the other cycling back and forth. This electricity in the United States uses 120 volts and cycles 60 times a second. Electricity inside the motor creates a magnetic flux between coil windings and the motor core. As the voltage cycles, it causes the motor shaft to turn. Thus electric energy is converted to mechanical energy. This mechanical energy is then transferred to the sewing machine by a belt or gear drive mechanism.
Today there are two different types of motors used in sewing machines. One is AC and the other is DC. While the flow of electricity must always operate in a continuous loop or circuit, that loop is constantly flipping back and forth with Alternating Current. That loop continues to flow in only one continuous direction positive to negative with Direct Current. Transformers are used to convert one to the other. Electric motors come in two types AC and DC. In both cases the electricity used to run the motor must operate in a continuous unbroken circuit or loop. If the flow of electricity in the circuit flows in one direction and then in the opposite direction, it is called alternating current. If the flow is in only one direction within the loop, it is DC or direct current. Use of a transformer can convert AC to DC or the reverse.
Early electric sewing machine motors were based on AC or Alternating Current electricity. These machines were essentially mechanical sewing machines using the levers and gears to move and form the stitches. Today many commercial sewing machines and low end sewing machines are still mechanical machines driven by electric AC motors. One of the hallmark features of a mechanical sewing machine is the buzz or whine the motor makes before it builds up sufficient force to move the sewing machine parts.
Again the sewing machine has changed. Electronic controls, DC pulse motors, and computer chips have again transformed the sewing machine. In many ways the modern sewing machine is very different from its antique cousins. It sews smoother, faster, hundreds more stitches, loads of convenience features, and much more.
To repair sewing machines, it is essential that you identify and understand the sewing machine power system. As a sewing machine user, it helps to understand how the sewing machine should work. If you are considering the purchase of a new sewing machine, consider the features of its power system.
When Elias Howe invented the sewing machine in 1846, it was an amazing mechanical device driven by human power. The evolution of the sewing machine included foot power, hand power, and eventually electrical power.
The power system of the sewing machine in those days involved the use of levers, gear, belts, and wheels. The user would start the process either by hand or foot power, and the sewing machine would transfer that movement across the sewing machine to its various parts. This enabled the machine to move the needle, hook, and feed systems to generate sewing.
Electrical motors were eventually introduced, but doing so required a new wave of invention. The mechanical devices previously used were replaced by the electrical motor. It was necessary to convert the electrical energy from the motor to mechanical energy within the sewing machine. The result was the use of a belt to transfer the power to the upper shaft of the sewing machine.
Another revolution launched when the electric motor replaced the treadle or hand crank. Sewing quickly became faster, more reliable, and easier. The electric motor could run for hours without ever growing weary. It was common for existing machines to be retrofitted for use with electric motors. Treadle and hand cranks were removed and motors connected via a belt drive. Electricity was transformed into mechanical power.
The electrical motors are AC motors which means they operate on standard Alternating Current from your home outlet. The term alternating describes the flow of electricity first in one direction and then in the other cycling back and forth. This electricity in the United States uses 120 volts and cycles 60 times a second. Electricity inside the motor creates a magnetic flux between coil windings and the motor core. As the voltage cycles, it causes the motor shaft to turn. Thus electric energy is converted to mechanical energy. This mechanical energy is then transferred to the sewing machine by a belt or gear drive mechanism.
Today there are two different types of motors used in sewing machines. One is AC and the other is DC. While the flow of electricity must always operate in a continuous loop or circuit, that loop is constantly flipping back and forth with Alternating Current. That loop continues to flow in only one continuous direction positive to negative with Direct Current. Transformers are used to convert one to the other. Electric motors come in two types AC and DC. In both cases the electricity used to run the motor must operate in a continuous unbroken circuit or loop. If the flow of electricity in the circuit flows in one direction and then in the opposite direction, it is called alternating current. If the flow is in only one direction within the loop, it is DC or direct current. Use of a transformer can convert AC to DC or the reverse.
Early electric sewing machine motors were based on AC or Alternating Current electricity. These machines were essentially mechanical sewing machines using the levers and gears to move and form the stitches. Today many commercial sewing machines and low end sewing machines are still mechanical machines driven by electric AC motors. One of the hallmark features of a mechanical sewing machine is the buzz or whine the motor makes before it builds up sufficient force to move the sewing machine parts.
Again the sewing machine has changed. Electronic controls, DC pulse motors, and computer chips have again transformed the sewing machine. In many ways the modern sewing machine is very different from its antique cousins. It sews smoother, faster, hundreds more stitches, loads of convenience features, and much more.
To repair sewing machines, it is essential that you identify and understand the sewing machine power system. As a sewing machine user, it helps to understand how the sewing machine should work. If you are considering the purchase of a new sewing machine, consider the features of its power system.
About the Author:
Download your free beginner's course: 7 Steps To Peak Performance For Your Sewing Machine. Now learn the Secrets Of Sewing Machine Repair. Dr. David Trumble authors several comprehensive sewing machine repair courses.
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