PI Releases 2-Axis Piezo Motor Controller

  The C-867 controller is designed for closed-loop positioning systems equipped with PILine piezo linear motor drives. A compac...
October 18, 2010—

  The C-867 controller is designed for closed-loop positioning systems equipped with PILine piezo linear motor drives. A compact case contains both drive electronics for the piezo ceramic motors and components for controlling and communication. The controller can be operated from a host PC either via a USB port or an RS-232 interface. Alternatively, a stand-alone operation is possible. Here, stored macro commands can be executed. Manual control by joystick or pushbutton box is also possible.

Two models are available: the C-867.160 is used to operate single-axis positioning systems, the
two-channel C-867.260 is used with XY scanning stages. The C-867 is based on a highly specialized DSP (Digital Signal Processor) that handles the PID servo-control algorithm as well as other system functions. Because of the motion properties typical for ultrasonic piezomotors, the controller has a number of advanced features, including dynamic control parameter adaption. By automatically switching between gainsets for dynamic and static operation an optimized settling behavior within a couple of 10 milliseconds is achieved. The broadband encoder input (50 MHz) allows high resolution encoders to be used with the outstandingly high accelerations and velocities that PILine drives deliver.

The integrated piezomotor drive electronics support all PILine ultrasonic piezomotors used for the M-66x to M-69x positioning stage series. Drift in the mechanical frequency of the motor caused by temperature or load changes is automatically compensated by a frequency-control loop which adjusts the operating frequency of the driving voltage. This leads to higher stability in pushing force, velocity and closed-loop control.

In addition to the user software for setup, system optimization and operation, comprehensive LabVIEW and DLL libraries are provided. The PIMikroMove user software provides the PITuningTool for optimizing system performance. Graphic displays show the system's behaviour and facilitate parameter setting.

Physik Instrumente (PI)
URL: 
http://www.piezo-motor.net