Hollow-shaft rotary table with timing-belt drive and Ezi-SERVO II Plus-E: precise positioning, cables, hoses or optics routed straight through the axis of rotation, and controlled via Ethernet from a PC or PLC – for indexing tables and rotary axes with varying load inertia.
Mechanics
The low-backlash involute timing belt achieves a repeatability of ±30 arcsec (≈ 0.008°) and runs quietly. A ball-bearing output table and carbon-steel timing pulleys make the unit rigid and wear-resistant. The drive pulley has its own bearings, so the motor shaft carries no belt forces – extending service life. Frame sizes 60, 85 and 130 mm with hollow shaft Ø27, Ø37 and Ø55 mm, reduction ratio 1:5 and up to 12.8 N·m permissible 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. Motion commands are sent via Ethernet, and all settings are retained in the drive after power-off. Alternatively, up to 256 stored positions can be triggered via digital I/Os – no network programming needed. The built-in switch daisy-chains up to 254 axes; a motion library (API) is available for PC applications under Windows.
