I usually use non fanuc cf memory card with pcima adapter, and i run 1250h with no problem, fanuc oimc on johnford vmc.
Try to use DNC ,if it's work well memory card it's fault.
Check parameter acc/dec ,gain.
Do you use g8 ,g5 or nothing ???try to change between this g05 sometime cause problem.
Check arc programming tollerance in parameter and cam system arc programming.