I understand the basics of how a garage door works – the opener motor is assisted by the spring’s stored energy, otherwise the door would require a *much* larger motor to lift it.
But, some of these springs really look monstrous, and I’m wondering – how is their stored energy controlled? How do we ensure the spring releases just enough energy to assist the motor, and doesn’t just launch the door into orbit?
In: 5
The spring offsets the weight of the door. If the spring had enough tension to move the door on its own, the door wouldn’t have closed in the first place. So it’s controlled by the fact that it’s attached to a heavy door that can only move along a track.
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