How do mechanical (automatic) watches keep time exactly when springs exert different amounts of force depending on how tightly wound they are?

Question

I know that mechanical watches have a spring that they wind to store energy, and un-winding the spring produces energy for the watch. But a spring produces a lot of force when it’s very tightly wound, and very little when it’s almost completely un-wound. So how does the watch even that out with high precision?

In: 95

Answer 1

Omg you should watch [Wristwatch Revival](https://youtube.com/@WristwatchRevival) on YouTube! He’s great to just have on and just chill for a bit.

You have the main spring which basically just keeps everything tensioned up. Then if it’s one of those automatic watches. There’s a mechanism that is off balance and spins around with your movements. This spinning around can turn the main spring mechanism.