Check the blade itself, if a kid put something hard (steel) in it and dinged the blade, that is the problem right off of the bat. I welded a ring on ours in the Industrial Arts shop and ran a chain to the table leg to keep it in the closed position and locked when not in use to keep the little curtain climbers from cutting anything and everything up in it!
God and family, the rest is icing on the cake.
I'm so far behind, I think I'm in first place.
Premier Bovine Scatologist
Host of the 2015 FAMILY WOODWORKING GATHERING