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Closed-Loop Servo Control for Voice-Coil and Single-Phase Motors has 192 kHz Servo Rate


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Aerotech’s XL4s linear amplifier is designed for closed-loop servo control of voice coil and single-phase motors

Aerotech’s XL4s linear amplifier is designed for closed-loop servo control of voice coil and single-phase motors, eliminating the non-linearities common with PWM amplifiers. The XL4s provides deterministic behavior, auto-identification, and easy software setup and features a multi-core, double-precision, floating-point DSP that controls the digital PID. All parameters are software-settable including control-loop gains and system safety functions. With the XL4s, you can achieve industry-leading settling times, long-term thermal stability, and sub-micron-level tracking accuracy with advanced features such as full state feed-forward, 192 kHz servo rates, and look-ahead-based velocity control.

The XL4s exceeds other single-phase motor controllers due to its industry-leading servo rate of 192 kHz. This directly correlates to better tracking errors and part quality at high-speeds in applications such as fast-tool servos, high-dynamic optical focusing axes, and high-speed pick-and-place machines. The XL4s has an encoder interpolation feature, dedicated analog and digital I/O, fiber-optic interface, and separate power connections for motor and control supply voltages.

Unlike other fast tool servo controllers, the XL4s packaging allows it to be panel-mounted in a machine enclosure, resulting in a smaller machine footprint and requiring less overall floor space.

XL4s Dimensions

XL4s Specifications

Feature Description
Motor Supply ±40 VDC max
Control Supply 85-240 VAC; 50-60 Hz
Digital Inputs Four Optically Isolated
Digital Outputs Four Optically Isolated
Analog Inputs One 16-Bit Differential; ±10 V
Analog Outputs Two 16-Bit Single-Ended; ±10 V
Emergency Stop Sense Input (ESTOP) Standard; 24 V Opto-Isolated
Position Synchronized Output (PSO) Standard:
  • Two-axis PSO
  • Three-axis Part-Speed PSO
Interpolated Feedback Output Yes
Communication Bus HyperWire® fiber-optic interface
Operating Temperature 0 to 50°C
Storage Temperature -30 to 85°C
Weight 2.9 kg
Standards CE Approved; NRTL Safety Certification; 2011/65/EU RoHS 2 Directive


Aerotech, Inc
101 Zeta Drive
Pittsburgh , PA 15238-2897
United States

Map for Aerotech, Inc in Pittsburgh PA US

Since 1970, Aerotech has designed and manufactured the highest performance motion control and positioning systems for our …
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