What to do if cutting deviates?
Make sure diamond saw blade is tightly locked;
Check with a ruler if saw blade is flat or not;
Make sure saw blade diamond has been opened;
Make sure flange diameter perfectly matches blade diameter;
Make sure all segments are in parallel arrangement;
Make sure the axle/shaft is in good shape without going bent;
Make sure saw blade and segments are suitable for cutting intended stones, because different stones require a different diamond segment formula and saw blade composition.