How a Garage Door Works
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- Опубликовано: 12 сен 2024
- The spring powered garage door lifter for slab doors is almost always of the kind illustrated in the video. Just how the linkage works is a mystery to most people and it's not easy to study a real one while it's working. The animated model makes it easy to see, it's just a lever lifting the door at its center line while a second link tips the slab from vertical to horizontal. Holmes the best known spring maker has repackaged the parts to make a safer more trouble free installation but the links and levers still work like this illustration.
If it's not obvious, those two springs store quite a bit of energy when the door is in the closed position, more than enough to take out an eye if something suddenly gives. Which is to say the DIYer should take care when adjusting or disconnecting any part of the door lifting mechanism.
You say the door has no adjustment other than spring tension. However, the most common door hardware made by Holmes (the 1100 and 900 models) have multiple adjustment points such as an extensible length cantilever arm, three mounting choices for the cantilever arm pivot, 15 different mounting positions for the kicker shoulder bolt and a sliding adjuster for the kicker pivot. It would be great if you could explain the interaction between all these.
You are absolutely correct. But this is not an instructional video for tuning up excellent Holmes hardware. It was a math exercise in kinematics. It is the solution to a linked motion problem done without prompting from existing hardware. It also extended the limits of the AC3D drawing program with programmed motions. Adjustments are something else. One solution fit this problem. The dialog just promotes mechanical gadgets.
My springs hang loose when the garage door is open. Are they supposed to have tight tension throughout the opening and closing of the door, because after opening all the way, the door then slides downward instead of staying in position. Thanks.
Steve, they should always have some tension
I really like this
Great video on the mechanics of the one piece garage door. Do you know of any instructional videos that can help on replacement and installation?
How do you adjust the height of the door , my door is scraping against the floor
I would hate to be the guy passing near it when one of those springs pop😮
thanks for the vid, it is eye opening. It is a very simple solution to a seemingly complicated mechanism. The Holmes system seem to be so grotesque and yours very simple. Do you by any chance have any measurements for the hardware? it looks very cool and I would like to use it to build my garage door. I want my door to be 10 feet wide and 7 feet tall. I can see the principle and how it works but I cannot calculate any measurements from your video.
This was drawn from memory then improved after a close look at an actual device. It’s .merely to show the action of a lever and tipping link working together. Look to Holmes for real hardware.
hi Mr robert . how to calculate geometrical dimension of link & ... according to door dimensionals? do you have function it?
thank you.
I need a hardware for my door. Holmes is closed. . Another brands? Thank you I live in Mexico.
Hi robert, my door is touching the upper frame and will not close, leaving a gap a the bottom because it cannot completely close (due to touching the upper inside door frame). what do i need to do to adjust this so that it closes fully. thanks Adrian
You need to recharge the door
how do you prevent the corners from leaking when it rains on this type of door?
I have a garage opening that is a bit unusual. Left side height 5',...Rt side, 6'5",...width, 11' Will a one piece door work with this odd shape? If not. I'll have to build hinged doors.
Tom Fairbanks Yes such a mechanism might work BUT the left and right sides would be radically different and would probably exceed the adjustment range of commercial hardware. Your question should go to the hardware manufacturer, Holmes. I was simply doing an exercise in kinematics and animation. In the long run you might find a one or two piece hinged door easiest. Just remember the hinge pins have to be in one straight line and that line is vertical not leaning.
Thanx for your reply. I wound up building hinged carriage doors with fancy hinges. they look good, and do the job.
wouldn't work without horizontal track
Where can you buy the hardware?
Home Depot sells the Holmes units. Check their website.
Хороший механизм,но от ворот придётся отбегать.
Any ideas how to electrify this?
The door hardware is similar to the excellent product sold by Holmes. Any conventional commercial linear opener will open the door . I have used Genie and a Sears model. There are others.
Im going to make this with my 1000W laser.
i was trying to creat that door in doom
M
I really like this