Compact AC servo drives help maximise machine performance

The compact Sigma-7 servos (200 V Series & 400 V Series) cover a wide power range from 50W up to 15kW in various formats with the largest motors offering a continuous torque of 95Nm and a peak 224Nm. 

Designed to meet the needs of today’s production engineering machine builders and end-users in packaging plants, semiconductor manufacturing, digital printing and wood processing, the servo drives have initially been released with embedded EtherCAT and Mechatrolink3 communications with further connectivity options to follow. 

The Sigma-7 Servo can be set up in just three minutes thanks to pre-sets in the amplifier software to simplify commissioning, a ‘tuning less’ function. Further, an auto-tuning function ensures quick adjustment. 

The Sigma-7 motor has been designed with energy-efficiency needs in mind and is able to operate with up to 20% less heat generated. Furthermore, the possibility of DC power coupling of axes offers the potential for sharing and energy savings of up to 30%. The drives also offer space savings as their ‘book-style’ housing design supports side-by-side installation of amplifiers which allows then to operate in small spaces to enable high density performance inside smaller cabinets. 

Other features include a speed loop bandwidth of 3.1kHz, shorter settling time, and reduced positioning time resulting in higher throughput.  
  

The drives are also designed with the essential safety features to ensure they meet today’s mandatory safety standards. For example, the STO function is implemented by default in all Sigma-7 servos so they comply with the requirements of SIL 3 and PL-e, while the safety functions SS1, SS2 and SLS can be integrated by using the safety module.