Hermco garage door counterweight systems have been around for many years.
Counter weight door system.
By introducing an actuator to the system it is just one more point of failure.
I d like to apologize for any grammar or english errors becau.
I hope it will be helpful to anyone who wants to make an automatic door closer with this design using sheaves and internal counterweight.
Our concept was conceived to eliminate the need to replace broken or fatigued springs and eliminate the ongoing need for service calls which is very costly over the life span of high cycle garage doors.
Wouldn t it be more reliable and easier to just have a counter weight that makes opening the door by hand real easy.
Counterweights are often used in traction lifts elevators cranes and funfair rides.
A counterweight is a weight that by exerting an opposite force provides balance and stability of a mechanical system.
In these applications the expected load multiplied by the distance.
The counter weight door is designed to suit most commercial and industrial applications.
Welcome to my first instructable.
This allows for smooth operation of large heavy doors and an unlimited cycle life.
An overhead door system employs counterweights which operate through cables connected to a drum which tapers from one end to the other so that the effective force acting on the door in the opening direction is reduced as the proportion of the weight of the door to be supported reduces.
Or where it is necessary to have a very large single span opening or full display of goods and or facilities.
A counterweight garage door doesn t need a tracking system which reduces its maintenance and it operates on a simple remote control mechanism that sits to one side of the opening.
The floor it will weigh about a pound and that will be only the retainer plate for the cement.
As the scenery and equipment loads are varied the amount of counterbalance is adjusted on the weight carriage so that the system can be raised and lowered with a minimum amount of effort.
A theatrical counterweight system provides a simple mechanical method of raising and lowering various balanced loads by a system of pulleys and weight carriages.
Just my humble opinion and i can understand the desire to make your doors open at the push of a button if for nothing more than it s cool.
The system is adjustable readily to accommodate different types of doors having different opening.
It is widely used in service stations workshops ambulance stations fire stations supermarket entrances warehouse loading bays transport depots showrooms factories etc.
35 feet and wider doors are shipped with a weight counter balance system.
By the time the counterweight hits the bottom of the enclosure a k a.
