Piezo LEGS WavePlate
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Piezo LEGS® WavePlate • • • • Unlimited rotation Sub-microradian resolution No power draw in hold position Quick response The Piezo LEGS WavePlate is intended primarily for use in laser applications with standard 0.5 inch (12.7 mm) inserts. The inserts are locked in place with the provided retaining rings. For added mounting flexibility, the turnable part has four M1.6 threaded holes. Fine adjustments are made using the innovative Piezo LEGS friction drive technology with submicroradian resolution. Manual override of the turnable part allows for coarse positioning. The WavePlate is ideally suited for move and hold applications within optics or other high precision fields. When the rotary part is in hold position the WavePlate does not consume any power. The drive technology is direct, meaning no gears are needed to create motion. This means there is no mechanical play or backlash in the motion. Operating modes The Piezo LEGS can move in full steps (wfm-steps), or partial steps (microsteps) giving positioning resolution in the submicroradian range. Speed is adjustable from single microsteps per second up to max specified. Controlling the motor PiezoMotor offers a range of drivers and controllers. The most basic one is a handheld push button driver. Another option is an analogue driver that regulates the drive speed by means of an ±7 V analogue interface. One of the more advanced alternatives is the PMD101 Microstep Driver/Controller. This product enables the user to vary the waveform as well as speed. The PMD101 is equipped with encoder signal inputs for close loop control. The microstepping feature divides full step cycle into maximum 2048 increments which results in microsteps as small as 0.5 µrad (0.1 arcsec). PMD101 Design your own driver Some customers prefer to design their own driver control for ease of integration or for even higher waveform resolution. In this case PiezoMotor can provide information to assist in the design. Ordering information Motor LW2011A- WavePlate motor Drivers and Controllers PMCM21-01 Handheld push button driver PMCM31-01 Analogue driver PMD101 Microstepping driver Accessories 102431-05 Motor cable 0.5 m 102431-15 Motor cable 1.5 m

Piezo LEGS® WavePlate Operating Principle 1 When all legs are electrically activated they are elongated and bending. As we shall see below, alternate legs move as pairs. Arrows show the direction of motion of the tip of each leg. The Piezo LEGS walking principle is of the non-resonant type, i.e. the position of the drive legs is known at any given moment. This assures very good control of the motion over the whole speed range. The performance of a Piezo LEGS motor is different from that of a DC or stepper motor in several aspects. A Piezo LEGS motor is friction based, meaning the motion is...

Piezo LEGS® WavePlate 24 10,8 24 M3x0,5 3,3 10,8 2x M3x0,5 24 24 Ø29 Main Dimensions LW20 2,35 (2x retaining Nut) Note: Refer to drawings for details. 2x retaining Nut 30 Electrical Connector Type On motor type A (standard) the connector is JST BM05B-SRSS-TB. 1 Part No Name 100331 REV. LR Waveplate SS Pin Assignment Pin Terminal Cable Color 1 Phase 1 Yellow 2 Phase 2 Green 3 Phase 3 White 4 Phase 4 Grey 5 Ground (GND) Black or brown 10 12,8 33 15 10 12,8 4x M1.6 01

Piezo LEGS® WavePlate Item no. LW2011A-00A Note: All specifications are subject to change without notice. Stall Torque_^ Motor type_ Cable (standard lengths)_ 00 = No cable (JST connector only) Visit our website for application examples, CAD files, videos and more...