Rotary Piezo LEGS®, designed 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

Rotary direct drive
Built in encoder
50mNm torque output
Vacuum compatible
Non-magnetic
Self-locking
No backlash

Concept Rotary LEGS®, piezo 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 LEGS® LR23-50

Type	Non-magnetic (C)	Non-magnetic (C), ext. shaft	Non magnetic (C), encoder	Non-magnetic vacuum (D)	Non-magnetic vacuum (D), ext shaft	Unit
Diameter	23					mm
Angular range	360					°
Speed Range @ Rhomb, no load, 20°C	0-160 (0-27 rpm)					°/s
Step angle, full step @ Delta, no load, 20°C	550					µrad
Motor resolution 14 bits, 8192 microsteps	<1					µrad
Built in encoder	No	No	Yes	No	No
Encoder type	N/A	N/A	Optical quadature	N/A	N/A
Encoder resolution	N/A	N/A	0.4	N/A	N/A	mrad
Stall torque			50			mNm
Holding torque			>50			mNm
Recommended operating range			0-25			mNm
Vacuum	No	No	No	10^-7	10^-7	torr
Operating voltage			42-48			V
Power consumption			7			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 H x D			? x ?			mm
Weight	65	68	80	65	70	g
Connector motor	JST BM05BSRSS-TB	JST BM05BSRSS-TB	Cable attached, driver dependent	Soldered cable w. JST 05SR-3S	Soldered cable w. JST 05SR-3S
Material in motor housing	Non-magnetic
Operating temperature	-20 to +70					ºC

Data sheet LR23-50

Main dimensions LR23-50

CAD files (step) 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

Waveform	Max feq. (Hz)	Speed range (mm/s)
Delta	3000	0–19 rpm (0–114°/s)
Rhomb	3000	0–27 rpm (0–160°/s)

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.

LR23-50 LEGS® Piezo Motor Starter Kit

Starter kits are available for the LTC450. 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