Servotecnica SpA has several years’ experience in customised design and manufacture of its SVTM series rotary actuators. Aimed at the specific requirements for high precision manipulation robotics manufacturers, these mechatronic rotary joints integrate a brushless servomotor, a high-resolution absolute encoder, and a zero-backlash harmonic gear unit in a compact package that typically features a hollow shaft to facilitate through wiring, slip ring assemblies or other essential system services. Recently the Italian motion component and systems manufacturer developed two new cost-effective standard versions of its SVTM series in 118- and 153-mm diameter package sizes that offer nominal output torques of 33 Nm and 49 Nm respectively, both are equipped with a 19 bits resolution BiSS-C protocol absolute encoder. The new standard SVTM 70 and 105 mechatronic joints cover a wide selection of the industry’s most commonly specified requirements and have been designed for further customisation for output torque and encoder type.
The smaller SVTM 78 series mechatronic joint features a brushless servomotor with a nominal speed of 3300 rpm at 48 VDC and a 50:1 ratio harmonic gearbox. The complete package with its BISS-C absolute encoder has a peak output torque of 73 Nm and, with a 118 mm diameter and nominal length of just over 101 mm includes a 12 mm through hole. The higher powered SVTM 105 provides a peak torque of 115 Nm. With its larger diameter motor and 50:1 ratio gear unit, this compact 158 mm diameter x 100.5 mm long housing features a 20 mm diameter through hole. Both models are IP65 sealed with waterproof connectors throughout.
Customisation includes alternative resolution absolute encoders – up to 22 bits in BISS and SS protocols as well as incremental, SPI or asynchronous encoder types. Optional gear unit ratios are available with potentially increased overall package length. Robotic system machine builders and OEMs can complement these rotary joints with Servotecnica’s own range of SVTS-A series slip ring assemblies – available in a wide choice of signal/power circuits.
Available in the UK from www.mclennan.co.uk
