A garage door opener is an automated mechanical device that manually opens and closes garage door automatically controlled by switches mounted on the garage wall. Most of these devices also contain a small handheld radio control mounted by the owner, which is able to operate the door manually from a distance. Garage doors are typically fitted with automatic openers for convenience. However, in case of emergency, manual opening of the door is still possible using a remote-controlled garage door opener.
There are three types of garage door openers namely, chain drive, screw drive, and belt drive. The most commonly used is belt drive which utilizes a series of pulleys made of copper or steel. Belt drive openers have been in use since the early 20th century. This type of motor has numerous advantages such as economy, speed, and durability. They can also easily extend the life of the motor beyond its expected lifespan. The main disadvantage is that they tend to get jammed when there is excessive force applied on the chain.
The screw drive garage door opener is another popular choice. This type of opener utilizes a shaft spring to lift the door. Although the operating force is evenly distributed throughout the chain, the opener tends to get stuck when the belt gets twisted. The drawback of this type is that the user has to be very careful while operating this device. Also, the operation can become difficult when there is an obstruction in the path.
If you want to buy a garage door opener, you must also consider the capacity of the motor. Generally, an opener of ten horsepower will serve for light garage door opening requirements. But, if you are operating heavier loads, then an opener of forty to fifty horsepower will be required. Garage door motors come in three different types including the sectional, reciprocating or centrifugal. Each type has its own advantages and disadvantages.
The torsion motor is one of the oldest types of motor used in garage door openers. A torsion motor consists of a shaft and a crank that is attached to a connecting rod. The torsion motor works by utilizing the power of torsion and an electric current to lift the garage door. The torsion motor’s ability to lift heavy weights is limited; therefore, it is not advisable for large garage door openings.
One type of garage door opener motor is the direct current (DC) trolley motor. This type uses the power stored in the battery. The trolley motor works by using a chain and a rack to lift the garage door. They are most commonly used with extension tracks. However, they can also work on a non-extension track if the operator chooses to.