I have a Denford Cyclone 1990 Fanuc ot, that last week decided to break it's X axis drive belt, so i replaced it,powered it up homed it, and was in production for about an hour before it decided to (what appeared to jerk in X) since then I havn't been able to home it and every time i try the machine position in X is different,(p,can) tried, currently have the SEM motor out of the machine as geussing the culprit but any help advise appreciated.