Originally Posted by
rekmeyata
Those set screws are there to help take up chain slack, in other words to set the chain tension. The tension should not be more or less than a half an inch when you push down on the chain in the center. Once you have the tension set correctly then you make sure the axle is aligned.
OP's bike
https://www.bianchi.com/bike/campagnolo-10sp-compact/
How exactly do the screws set the chain tension on this?