DIRECT DRIVE ROTARY TABLE IMPROVES POSITIONING ACCURACY OVER GEAR-DRIVEN MOTORS

Mori Seiki has released the revolutionary DDRT-260 rotary table. Designed for operation on Mori Seiki's DuraVertical 5060 and 5080 and NV4000 DCG vertical machining centers, the DDRT-260 offers stable, high-efficiency 4-axis machining with powerful clamping and high-precision indexing. The DDRT-260 distinguishes itself from other rotary tables on the market by using a direct drive motor to drive table rotation instead of a servo motor and worm gear. Equipped with a high accuracy encoder that is mounted directly to the spindle, the unit provides improved positioning accuracy over gear-driven motors and eliminates backlash, positioning delays and costly maintenance requirements.

Additionally, the DDRT-260 is capable of rotating 180 deg and reclamping in approximately 0.4 seconds with a rotational speed of 150 RPM. With a table diameter of 260 mm (10.2 in), the DDRT-260 has a 55 mm (2.17 in) through hole that allows for pneumatic or hydraulic clamping and uses ø 200 mm (7.9 in) cross roller bearings to achieve high rigidity, high precision guides. The rotary table also offers an indexing precision of ± 6 sec (± 0.0016 deg) and boasts a maximum horizontal loading capacity of 400 kg (880 lbs). Additional sizes of Mori Seiki's direct drive rotary table will be available in late 2008. www.moriseiki.com