Piezo LEGS® Rotary Ø170 pages

Piezo LEGS® Rotary Ø17

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Direct drive - backlash free
Integrated Absolute Encoder
Microradian resolution
No power draw in hold position
Quick response

The LR17 is a high precision motor in the second generation
of Piezo LEGS Rotary. It is intended for a large range of
applications where high speed dynamics and positioning with
precision is crucial. High torque output in a small package is
also beneficial.
The LEGS technology is characterized by its outstanding
precision. Fast speed and quick response time, as well as long
service life are other benefits. In combination with the micro
radian resolution the technology is quite unique.
The motor is ideally suited for move and hold applications or
for automatic adjustments. When the motor is in hold position
it does not consume any power. The drive technology is direct,
meaning no gears are needed to create motion. Because of this
the motor has no mechanical play or backlash.
The motor comes with an integrated high resolution magnetic
encoder. With feedback from the encoder you can run in closed
loop with a remarkable resolution of 0.2 mrad (0.01º). Even
more impressive is the open loop resolution of the motor
which is 0.1 µrad (0.000006º).

Operating modes

The motor can move in full steps (wfm-steps), or partial steps
(microsteps) giving positioning resolution in the microradian
range. Speed is adjustable from microsteps per second up to
max specified. The motor can be operated with feedback from
the integrated magnetic encoder, or have the control loop
closed using an external sensor with even higher resolution.

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 motor speed by means of
an ±10 V analog interface. The more advanced alternatives are
the microstep drivers/controllers in the 100- and 200-series*.
These products allow for closed loop control and precise
positioning. The microstepping feature divides the wfm-step
into thousands of small increments which results in microsteps
in the microradian range. The PMD units are straight forward
to use, supports quadrature and serial sensors, and have
multiple I/O ports.

PMD101

PMD206*

Design your own driver

Some customers prefer to design their own driver for ease of
integration. In this case PiezoMotor can provide information to
assist in the design.

Ordering information
Motor
LR17

Standard version, stainless steel

Drivers and Controllers
PMCM31

Analogue driver

PMD101

1-axis microstepping driver

PMD206*

6-axis microstepping driver

PMD236*

36-axis microstepping driver

* The PMD206 / PMD236 are not yet available