Initially, garage door opener technology was made up of a simple remote and a receiver to supervise the opener instruments. The function of a door opener would depend on the transmitter's frequency. With the correct receiving of signals, it opened and closed the door automatically. Wireless garage door openers were another form of earlier door opener technology that had to deal with shared frequency problems.



The contemporary garage door opener provides multiple transmission technologies. Such a system requires 300 to 400 MHz frequency spectrum, and mostly the transmitter/receiver depends on rolling code technology. This technology safeguards it against the recording of a code and its being replayed. With the transmitting of code, the system automatically creates a new code using an encoder. The offset system of a garage opener lifts the door using torsion springs.

These days, most of the garage door openers have a remote control system, and are easily accessible in the market. There are also various counterweight technologies that permit the door to be moved without having too much pressure.

Generally a trolley actuator is used for residential doors. This system is attached with a motor and a trolley. The motor is hung near the ceiling, while the trolley is connected to the door arm. The door opens and closes with the transversal of rail by the trolley.

A jackshaft actuator is another type of actuator that functions with a torsion spring technology. This system is not attached to the door, but to the spring shaft. The shaft rotation of the technology permits the moving of the door. The one big benefit of this system is that it can be operated from the side of the door without the help of a rail, which is needed in a trolley actuator. Usually jackshaft actuators are not preferred, because of their obvious safety concern. The operator will not be able to know if someone is being crushed by the door.

The latest systems come with a chain loop or a steel-reinforced rubber belt, which moves the trolley across the rail. The function of a rubber belt is to eliminate noise during the opening and closing of the door.

You are required to remember certain things before you purchase a garage door opener.

• Your garage door opener system should be dependable, safe and noiseless. Especially for garages that have workshops, bedrooms or offices overhead.

• Always compare the mechanisms of your system with other systems, to purchase the latest as well as most efficient model in the market.

• Compare the cost of different door openers, because dealers may make a large profit from selling a garage opener to you. Look for a system with appealing stop sensors for correct opening and closing.

There are several varieties of garage door openers in the market, but you have to choose a safe and efficient system that has all the features. Things such as dependable functions, power and speed, automatic reverse, rolling codes and wireless keypads.