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Re: pic: Automatic Tensioner
A spring as chain tensioner work great, when the chain is only being driven in one direction. Ask yourself these two things:
What happens when the chain is driven the other way?
How stiff would that spring have to be to maintain tension when the chain is driven in both directions?
Edit: If the ramp truly won't allow the sprocket to be pushed down, it'd work in theory. Assuming a coefficient of friction of 0.3 that would be around 16.7deg.
Idea: What if you put the idler sprocket on spring-loaded swing arm and prevented back-driving with a one-way roller bearing?
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Theory is a nice place, I'd like to go there one day, I hear everything works there.
Maturity is knowing you were an idiot, common sense is trying to not be an idiot, wisdom is knowing that you will still be an idiot.
Last edited by JamesCH95 : 24-08-2011 at 11:37.
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Yes, the real world is like that. Let's operate on a higher plane. - Taylor [more] 
24-08-2011, 11:31
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