Rotary Piezo LEGS®, with direct drive and 30mNm torque output.

This is our smallest rotary Piezo LEGS®, with direct drive and 30mNm torque output.

LR17 Rotary Piezo Motor

Rotary Piezo Motor with built in encoder

  • Rotary direct drive
  • Built in encoder
  • 30mNm torque output
  • Self-locking
  • No backlash

Piezo LEGS® LR17 Rotary Motor

This is our smallest rotary Piezo LEGS®, with direct drive and 30mNm torque output.
The i gives closed loop resolution of 0.2 mrad (0.01°), while open loop resolution is sub-microradian. Full force power-off locking is a safety function inherent to the design.
Not designed for vacuum and non-magnetic environments

Specifications LEGS® LR17

Type
Standard (A)
Unit
Diameter
17
mm
Angular range
360
°

Speed Range
@ Rhomb, no load, 20°C

0-0-265 (0-44 rpm)
°/s
Step angle, full step
@ Delta, no load, 20°C
1000
µrad
Motor resolution
14 bits, 8192 microsteps
<1
µrad
Built in encoder
Yes
 
Encoder type
Magnetic, absolute
 
Encoder accuracy
2.0
mrad
Encoder resolution
0.2
mrad
Stall torque
0-15
mNm
Holding torque
>30
mNm
Recommended operating range
0-15
mNm
Vacuum
No
 
Operating voltage
42-48
V
Power consumption
3.5
mW/Hz
Shaft load, max
radial, 6.5 mm from mounting face
1
N
Shaft load, max
axial
2
N
Shaft press fit force, max
5
N
Mechanical size L x H x D
TBA
mm
Weight
30
g
Connector motor
CviLux CI1116M-2VD0
 
Material in motor housing
Aluminium, stainless steel
 
Operating temperature
-20 to +70
ºC

Main dimensions LR17

Motor performance LR17

Motor performance with waveform Rhomb (filled) and waveform Delta (dotted). The full step length is the average distance the drive rod moves when the legs take one full step (i.e. for one waveform cycle).

Note: A standard deviation σ of 0.5 μm should be taken into account.
Typical values are given for 20ºC.

Motor speed at 20 ºC no load

Waveform
Max feq. (Hz)
Speed range (mm/s)
Delta
3000
0–28 rpm (0–170°/s)

Rhomb

0–44 rpm (0–265°/s)

LR17 encoder information

The LR17 has an integrated magnetic absolute encoder. It gives 15-bit SSI data. SCK (Sensor Clock) and SDA (Sensor Data) are normally at high level (idle). When receiving a clock pulse from the controller, the LR17 will respond with position data. The SCK frequency should be 70–180 kHz. Data should be read shortly before the positive flank.

The time-out between positive flanks is 20–30 µs. The output data is 15 bits (msb first), followed by a stop bit. If SCK continues beyond the stop bit, there will be a second stop bit followed by repeated 15-bit data and a stop bit. A minimum of 120 µs is needed after position readout to make sure that position data is refreshed. Reading position every 0.5 ms is the maximum recommended rate for continuous operation.

A – 1st clock pulse, SDA stays idle until positive flank.
B – 2nd clock pulse, SDA output is bit1 (msb).
C – 16th clock pulse, SDA output is bit15 (lsb).

LR17 encoder information
Controller PMD401 on the left and PMD301 on the right

Controlling the motor

Our motor control units come in many different versions, with controllers and amplifiers for laboratory use as well as for integration into OEM devices.

We can also license the drivers for customers that want to build their own driver electronics.

LR17 LEGS® Piezo Motor Starter Kit

Starter kits are available for the LR17. Starter Kits are for evaluation purposes only with a max quantity of 3 kits/customer. You only pay for the motor.

Linear Non-Magnetic and Vacuum capable LL10D Piezo Motor
LEGS LT40 direct drive Piezo Motor Starter Kit

Do you need a free consultation or a starter kit?

Request a quote

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