Rotary Piezo LEGS® Motor, for vacuum and magnetic environments
A 50mNm torque output version for non-magnetic and/or vacuum environments. The non-magnetic version comes with built-in encoder or with extended shaft for customer encoder customization.
Rotary Piezo Motor with built in encoder and 50mN, torque output
- Vacuum compatible
- Non-magnetic
- Built in encoder
- 50mNm torque output
- Self-locking
- No backlash
Piezo LEGS® Rotary Motor for vacuum and magnetic environments
This is our rotary Piezo LEGS®, with direct drive and 50mNm 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.Designed for vacuum and magnetic environments.
LR23-50 mNm product portfolio
- with encoder
- without encoder
- without encoder and with extended shaft
Specifications Piezo LEGS® LR23-50
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Type |
Non-magnetic (C) | Non-magnetic (C), ext. shaft | Non magnetic (C), encoder | Non-magnetic vacuum (D) | Non-magnetic vacuum (D), ext shaft |
| Diameter | 23 mm | ||||
| Angular range | 360° | ||||
| Speed Range @ Rhomb, no load, 20°C, driver dependent |
0–160 (0–22.9 rpm) °/s |
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| Step angle, full step @ Delta, no load, 20°C |
550 µrad | ||||
| Motor resolution (open loop, 8192 microsteps) | <1 µrad | ||||
| Built in encoder | No | Yes | No | ||
| Encoder type | N/A | Optical | N/A | ||
| Encoder interface | N/A | Quadrature, incremental | N/A | ||
| Encoder resolution | N/A | 0.383 (16384 counts) mrad | N/A | ||
| Stall torque | 50 mNm | ||||
| Holding torque | >50 mNm | ||||
| Recommended operating range | 0-25 mNm | ||||
| Vacuum | No | 10-7 torr | |||
| Max. operating voltage | 48 V | ||||
| Power consumption | 6 mW/Hz | ||||
| Shaft load, max – radial, 6.5 mm from mounting face |
5 N | ||||
| Shaft load, max – axial | 2 N | ||||
| Shaft press fit force, max | 5 N | ||||
| Mechanical size L x D (incl. shaft) | 34.7 x 23 mm | 37.7 x 23 mm | 46.5 x 23 mm | 34.7 x 23 mm | |
| Weight | 65 g | 68 g | 80 g | 65 g | 70 g |
| Connector motor | JST BM05BSRSS-TB | Cable attached, driver dependent |
Soldered cable w. JST 05SR-3S |
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| Material in motor housing | Non-magnetic | ||||
| Operating temperature | -20 to +70 ºC | ||||
| Storage temperature | -20 to +70 ºC | ||||
| Control | Open loop or closed loop | ||||
| Lifetime | 2,5×109 wfm-steps at 25 mNm, 1atm and 25C | ||||
| Max. acceleration | 800 Hz/ms | ||||
| Index | N/A | Yes | N/A | ||
Main dimensions Piezo LEGS® LR23-50
Motor performance
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
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Waveform
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Max feq. (Hz)
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Speed range (mm/s)
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Delta
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3000
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0–19 rpm (0–114°/s)
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Rhomb |
0–27 rpm (0–160°/s)
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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.
Starter Kit
Our Starter Kits are designed to simplify evaluation and accelerate development. Available in multiple configurations, they provide everything needed to begin testing and integrating your selected motor platform.
Each kit includes the required components to evaluate the motor.
