A servopack is Yaskawa's name for a servo drive, also called a servo amplifier. It takes the position, speed or torque command from the controller, compares it with the feedback from the motor encoder and regulates the motor current continuously, so the servo motor follows the command precisely. Servopacks are used in packaging, handling, robotics, printing and machine tools. SCN supplies servopacks from Yaskawa.<\/p>\n
The range includes the Sigma-7 series, with the SGD7W dual-axis drive and the SGD7C with built-in motion controller, and the newer Sigma-X series as single-axis SGDXS, dual-axis SGDXW and triple-axis SGDXT. Models cover 50 W to 15 kW for 200 VAC single- or three-phase and 400 VAC supply, with EtherCAT, MECHATROLINK or Profinet, and several have safety functions up to PL e and SIL 3. Matching motors are under servo motors<\/a> and rotary servo motors<\/a>, and controllers under PLC systems<\/a>.<\/p>\n How to choose:<\/strong> start with the motor, because the servopack must match its series and power. Then choose the supply voltage, the number of axes per drive, the network your controller uses and whether you need built-in safety or a motion controller in the drive.<\/p>\n A servo drive is the power electronics that makes a servo motor do exactly what the controller commands. It runs three nested control loops \u2013 position, speed and current \u2013 and uses the encoder signal from the motor to correct any deviation continuously. The result is fast, accurate motion with full torque even at standstill, which a standard frequency inverter cannot hold as precisely.<\/p><\/details>\nFrequently asked questions<\/h3>\n
What is a servo drive and how does it work?<\/summary>