XP CATALOG

The axial rigidity of the ball screw influences directly in the total rigidity of the drive, which in turn is key to increasing the natural frequency of the system, improving the control parameters Kv and Kp of the motor and therefore improving the jerk. The greater rigidity of COMPLEX ball screws allows greater accelerations and jerks, thus achieving a more dynamic machine. Depending on the ball screw configuration and providing the alignment, assembly and lubrication conditions are correct, these highly dynamic ball screws can reach DN values of up to 210.000. The increased rigidity of COMPLEX ball screws allows more demanding working conditions without the appearance of the chatter effect and eliminating the inversion error, avoiding the "lost motion moment" effect, obtaining improved ball bar test results, and therefore considerably improving the surface finish of the work piece, especially in 5-axis machines with challenging machining operations. In addition to rigidity efficiency, the COMPLEX technology provides an increase of the dynamic and static load capacities of the ball screw, attaining a very high durability with greater fatigue life and capacity to work under the most extreme conditions. COMPLEX ball screws show a very high efficiency in low distance forward and backward machining with minimum torque variation. The optimization of the ball recirculation design and the highest geometry accuracy ensure a very low torque variation along the shaft, offering a very smooth rotation and reduced noise levels. Depending on their application, COMPLEX ball screws, are assembled with preloaded double nuts (with 1 or 2 starts) or TUC Ultracompact nuts. In both cases, the nut can be designed with a U-type or B-type recirculation system. U-type recirculation system B-type recirculation system Types of COMPLEX nuts depending on application: Technology Sectors Features Preload Nut type Recirc. Diameter Pitch Ball size Application COMPLEX MACHINE TOOL High speed 5 axis, large size and combined machines tools, die mold processing machines, aeronautics and automotive work pieces and other applications with highly demanding conditions. High dynamics Efficient rigidity (optimization of rigidity-torque relation) DN up to 210.000. For Highly demanding duty cycles improvement of machining times YES TD Double Nut (1 start) U 25-120 10-80 5-12 High dynamic applications, Average load requirement B 50-160 12,7-25 9-19 High dynamic applications, Higher load requirement TD Double Nut (2 start) U 32-120 20-80 6-12 High dynamic applications, Higher load requirement, without nut length limitation B 63-140 25-32 9-12 High dynamic applications, Extra high load requirement, without nut length limitation TUC Ultracompact Nut (2start) U 32-100 20-120 6-9 High dynamic applications, high load requirement, with nut length limitation 13