Why does the elevator need a counterweight?

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What is the role of counterweight in elevator? How do you calculate its mass?

#aftereffects #elevator #explainervideo #motiongraphics
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A useful explanation of the use of a counterweight. It is, of course, very simplified. Not all lifts are driven through a worm gear. High speed lifts are direct drive, but the balance principle is the same. Most hydraulic lifts do not use a counterweight.

caroleast
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What software did you use to create this video?

hieptran
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I find these videos very helpful and interesting

amandablair
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Meaning the counter weight is more than weight the capacity of car?

jasonburce