Garage door motors are complex pieces of equipment and require annual maintenance. The first garage door motor was invented by Mr. Johnson in 1926. Contrary to what most people believe, the garage door motor does not lift the heavy garage door. Most of the actual heavy lifting comes from the springs that are connected to the torsion system. The electric power only controls how far and how hard the garage door actually opens and closes. There is a trolley on the garage door opener rail that connects to the garage door itself by way of a “J” bar. It is called a J bar because it looks like the letter “J”. The trolley is pulled along by a chain, screw, or belt that the motor turns and operates. There are limiter switches within the opener that control how far the garage door opens and closes. The power unit itself usually hangs towards the back end of the garage door in a housing where the motor is kept. The unit itself is mounted with angle iron. The stronger the angle iron the sturdier the opener is held up. The latest type of opener is called the jack shaft opener, typically this is a commercial unit. More recently they have made a residential unit that actually turns the torsion spring and is mounted on the side of the garage door. This allows for more room to store anything you might want to keep in the garage without interfering with the movement of the garage door.
There are so many different types of garage door openers; it makes it hard to keep track of what parts you are going to need. It seems like the older the unit the better quality the unit is. The garage door opener motor plays an important role of society in the 1900s and the new millennium. Actually, the latest units actually sync up to your phone and let you know when your garage door is open or closed.
Many of the old garage door remotes used a fixed code DIP switch to control the door. The problem is these old type of remotes can be duplicated or copied very easily. Another feature that has been added in the last decade is the rolling code feature. A rolling code opener always changes the frequency so that people cannot duplicate the pin number and get access to the garage door. Safety has become a large issue as well. The reason is because garage doors are the largest moving object in the house. In the early 90s garage doors required safety eyes; these safety eyes cause the door to go up if anything is in the way of them. The photo eyes are not to be installed higher than 6 inches off the ground. The reason is that if a baby was crawling, the door would not be able to close. In 1982, they also built in an automatic reverse if the garage door comes down on anything. Garage door openers have come a long way over the past several decades and will continue to amaze human life as we know it on earth.