Model FA497/FA498 Computerized Roving Frame simplified the differential gear system and twist change gear on basis of FA493/FA494 roving frame,Adopts 4 frequency motors to drive rollers, flyers, bobbins and bottom rail lifting,and realizes precise proportional synchronizing action,It has advantages such as easy operation,high automatic degree,high resultant yarn quality compare with three motors drive control. Accordig to user’s demand, the four motors can choose a servo motor, two servo motors, three servo motor or full servo motor drive. Equiped with auto lubricating unit, automaticl lubracating with fixed time and quantity. This structure is the most advance model for the four motors drive roving frame in domestic and aboard.