Hollow-shaft rotary table with precision gearbox and Ezi-SERVO II EtherCAT: high-accuracy positioning, cables, hoses or optics routed straight through the axis of rotation, and integrated into the machine control via EtherCAT – for indexing tables and rotary axes with demanding accuracy and load requirements.
Mechanics
The low-backlash precision gearbox achieves a repeatability of ±10 arcsec (≈ 0.003°). With no belts or pulleys, there is no re-tensioning – the unit is low-maintenance. On HG130S and HG170S a crossed roller bearing supports the output table and handles high axial and moment loads. Frame sizes 60, 100, 130 and 170 mm with hollow shaft Ø20 to Ø85 mm, reduction ratios from 1:5 to 1:36 and up to 170 N·m permissible torque. The HG170S is also available with an 86 mm motor for up to 107 N·m holding torque. A home sensor set (NPN or PNP) is available as an option.
Control
The Ezi-SERVO operates in closed loop: no lost steps, no hunting at standstill, no gain tuning required. It connects via EtherCAT using the standard CiA 402 profile, so the axis works with common EtherCAT masters, including positioning, homing and cyclic synchronous operation. Cable lengths of up to 100 m between nodes are possible.
