Whichever cam is rolling over first you need to twist that cable up a little or untwist the other cable, whichever you prefer to maintain proper drawlength. Of course you need some sort of bow press to do this. It's trial and error till you feel both cams hitting the stops at the same time when you draw the bow. Sometimes a little tedious but well worth the knowledge you'll gain. And the bow should shoot better, too.
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