The latest version of MSR TwinDrive is intended to simplify the mechanical transmission system on large vertical lathes. As a result, the design of turning tables becomes easier while improving the precision and making the machine more compact, according to the company.
"The latest MSR drive designs have been refined using the newest generation of drive and control systems (i.e. from Siemens CNC or FANUC)," said a company spokesperson. "The MSR drive is composed of two identical gearboxes (TwinDrive system) sharing the driving torque 50%-50% during turning operations. With the help of the CNC system that manages the motor preload torque, the system is able to cancel 100% of backlash. In addition, MSR exclusive features enable a very accurate positioning level. Thus, it allows the execution of additional functions on the C-axis without any additional mechanical devices. For instance, top accuracy is kept during milling operations with one motor driving and the other motor braking.
"Redex provides the unique commercial solution for turning and milling drives in the machine tool market. Before MSR, turning table manufacturers used two different types of drives when a C-axis was needed: a main drive for turning operations driven by a big spindle motor and a feed-preloaded gearbox to cancel the backlash during C-axis mode that needed to be clutched and unclutched to the crown. In addition, the main drive needed to be shifted to neutral ratio.
"The MSR drive solution from Redex simplifies the design of turning table mechanical transmission systems. It eliminates the need for developing a complex and expensive gearbox for the C-axis, including a complicated system of clutching/unclutching. A solution with two motors is less expensive and easier to manage. In comparison to high duty turning tables used in conventional configurations that require a 160 kW motor, the MSR uses two 80 kW motors, which are more standard and less expensive despite the fact that there are two of them.
"When the diameter of the chuck or part to machine is large, conventional homemade kinematics consisted of using a different stage ratio of 1/1, which resulted in high costs and loss of efficiency. MSR kinematics allow the drive to be placed right under the chuck, directly meshing with the crown. Spare parts management is simplified with the use of a smaller motor. Furthermore, there is no need to manage the C-axis gearbox manufacturing with all its components.
"For this MSR drive solution, developed as a turnkey system by Redex, the latest generation of MSD two-speed gearbox is combined with the improved version of cubic R Series right angle bevel gearbox. The design upgrade includes a new and more compact and reliable speed changer as well as a new lubrication arrangement. The external appearance has also been improved as required for high-tech machine tool component design. Supplied as a self-contained sub-assembly, this integrated and compact system is ready to be implemented. Depending on machine arrangement, OEM can use the bevel box as an option."
The latest range improves features of the four sizes, MSR330- MSR640- MSR650- MSR660 with torque capacity at pinion from 2,000/4,000 Nm (2 x 40 kW motors) up to 9,000/18,000 Nm (2 x 100 kW motors) with three possible ratio combinations of 7.66&2, 9.88&2, 11.49&3. This solution, combined with pinion/ring ratio of about 10 to 15 offers turn table torques from 20,0000 Nm up to 270,000 Nm and global ratios (gearbox + ring gear) of 77/20 and 172/45.
For more information contact:
Andantex USA Inc.
1705 Valley Road
Wanamassa, NJ 07712
800-713-6170
info@andantex.com
www.andantex.com