The servo engine is a closed-loop servomechanism that uses position feedback in order to control its rotational speed and position. The control signal is the input, either analog or digital, which represents the final position command for the shaft.
Servo drives are designed to power and manage performance of electric powered servomechanisms. They particularly monitor feedback signals and continuously adjust to deviations from the anticipated behavior of closed loop systems. This can help to improve overall performance through faster acceleration rates and more precise velocity and position control.
AC servo drives are specifically created for AC motors, and offer the added benefit of motor feedback. After receiving and transmitting signals to produce movement, these drives also receive and adjust to reports from sensors on engine status. In providing continuous adjustment, they amplify performance with regards to the required velocity, torque, and placement, and also stiffness, damping, and feedback gain in AC servo motors and control systems.
The Ever-power category of brushless servo systems is fully digital and offers a rich group of features to cover a broad selection of applications. There are eight standard servo motors which can be operated in combination with one of three standard servo drives.
The Ever-power brushless motors include a 2,500 line incremental encoder with quadrature data signals (A+, A-, B+, B-) and a marker pulse (Z+, Z-). All three indicators have a collection driver output leading to 10,000 pulses per revolution plus index tag as the typical resolution in the drive. Each servo motor also has one connector for the encoder and another connector for the engine power and optional 24 VDC spring-set keeping brake.
The servo drives could be configured for a wide range of command sources including analog torque, analog velocity, “step and direction” or “up and down” pulse position, quadrature encoder follower, and built-in movement controller with preset position, velocity, or torque. Presets could be selected with discrete inputs or modified with the MODBUS serial user interface.
Configuration and diagnostics of the servo drives could be accomplished with the integrated keypad/screen or the easy-to-use SureServo Pro software on a Windows environment.
Low inertia models:
100 W, 200 W, 400 W, 750 W and 1 kW
Speeds up to 5,000 rpm.
Medium inertia models:
1 kW, 2 kW and 3 kW
Speeds up to 3,000 rpm.
Square flange mounting with metric dimensions: 40, 60, 80, 100, 130 and 180 mm flanges
Keyless drive shafts support clamp-on style coupling
Integrated encoder with 2,500 (x4) pulses/revolution plus marker pulse (once per revolution)
Optional 24 VDC spring-set holding brakes
Standard hook-up cables for engine power/brake and encoder
Standard DIN-rail mounted ZIPLink break-out package for the drive CN1 connector (with screw terminal connections)
Main Power and Control Power Inputs
Main Power: 230V AC 3-Phase (Single phase option w/ low inertia systems)
Control Power: 230V AC Single Phase; 50/60 Hz
Fully digital with up to 450 Hz velocity loop response
Easy set-up and diagnostics with built-in keypad/display or the SureServo Pro PC-based software
Five-in-one command options include:
±10V torque or velocity command
Pulse train or learn encoder position command (accepts series driver or open up collector) with electronic gearing
Built-in indexer for position control using 8 preset positions and/or position setpoint with serial MODBUS
Tuning aids consist of inertia estimation and easy-tuning for up to 10 levels of response
Optically-isolated digital inputs (8) and outputs (5), analog outputs for monitor signals (2), and line driver output for encoder (with scalable resolution)