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Veléz Sarsfield 201640 Martinez

Buenos Aires

Tel.: +54 (9) 11 5993 8719

Horne Technologies cc

PO Box 536

Betty's Bay, 7141

Tel.: +27 (0)76 563 2084

Building of FAULHABER MINIMOTOR SA, Croglio, Switzerland


Zona Artigianale 8, Madonna del Piano

6980 Croglio

Tel.: +41 (0)91 611 31 00

Building of FAULHABER MICROMO LLC, Wien, Austria


14881 Evergreen Avenue

Clearwater, FL 33762-3008

Tel.: +1 (727) 572 0131

NRC Engineering & Precision Drives Co., Ltd.

17F., No. 890, Jingguo Rd., Luzhu Dist.

Taoyuan City 33858, Taiwan, R.O.C.

Tel.: +886 (0) 3-316-1838

EDEL Teknoloji Sistemleri Sanayi ve Ticaret Ltd.Şti

Folkart TowersAdalet Mah.Manas Blv. No:47B/2809

35530 Bayraklı/İzmir

Tel.: + 90 232 215 08 91

Building of FAULHABER Asia Pacific Pte Ltd., Singapore

FAULHABER Asia Pacific Pte Ltd.

Blk 67 Ubi Road 1, #06-07 Oxley Bizhub

Singapore 408730

Tel.: +65 6562 8270

Compotech Provider AP

Gustavslundsvägen 145, 4 tr

167 51 Bromma

Tel.: +46 (0) 8 441 58 00


56 (bldg. 32), Shosse Enthusiastov

111123 Moscow

Tel.: +7 495 2214 052

Building of FAULHABER Polska sp. z o.o., Poznan, Poland

FAULHABER Polska sp. z o.o.

Ul. Górki 7

60-204 Poznan

Tel.: +48 61 278 72 53

FAULHABER Malaysia Sdn Bhd

1A-2-01 & 02 · One Precinct · Lengkok Mayang Pasir

11950 Bayan Baru · Penang · Malaysia

Tel.: +60 4 619 2570

Swiss Amiet Co., Ltd.

W-903, SK V1 Center, 11 Dangsan-ro 41-g

Yeongdeungpo-gu,07217, Seoul

Tel.: +82 (0) 2 783 4774

Shinkoh Electronics Co., Ltd.

Tokyo Sales Office, Motor Sales Division8F, REID-C OMORI building, 6-20-8

Minami-oi, Shinagawa-ku, Tokyo 140-0013

Tel.: +81 (0) 3 6404 1003

Building of FAULHABER Italia S.r.l., Lomazzo, Italy

FAULHABER Italia S.r.l.

Via Cavour 2

22074 Lomazzo CO

Tel.: +39 0236714708

Inteltek Automation JV

S.No. 100/5, Ambegaon

Pune - 411046

Tel.: +91 (0) 20 39392150

Lewenstein Technologies Ltd.

1 Ha'arava St. Givat Shmuel

5400804 Israel

Tel.: +972 3 9780 800

Electro Mechanical Systems Ltd.

Eros House, Calleva Industrial Park, Aldermaston

Reading, RG7 8LN

Tel.: +44 (0) 118 9817 391

Building of FAULHABER France SAS, Montigny-le-Bretonneux, France


Parc d’activités du Pas du Lac2, Rue Michaël Faraday

78180 Montigny-le-Bretonneux

Tel.: +33 (0) 1 30 80 45 00


Passeig Ferrocarrils Catalans 178

Cornellà de Llobregat 08940 (Barcelona)

Tel.: +34 93 422 70 33


Suokalliontie 9

01740 Vantaa

Tel.: +358 (0) 9 5259 230

Routech s.r.o.

Dr. Milady Horákové 185/66

460 06 Liberec

Tel.: +420 489 202 971

Compower ApS

Marielundvej 29

2730 Herlev

Tel.: +45 (0) 44 92 66 20

Marte Científica e Instrumentação Industrial Ltda

Av Fco Andrade Ribeiro 430

37540-000 Santa Rita do Sapucai, MG

Tel.: +55 (11) 3411 4500

Building of FAULHABER Drive System Technology (Taicang) Co., Ltd.,Taicang, China

FAULHABER Drive System Technology (Taicang) Co., Ltd.

Eastern Block, Incubator Building, No. 6 Beijing Road West

Taicang 215400, Jiangsu Province

Tel.: +86 (0) 512 5337 2626

Building of FAULHABER Benelux B.V., Eindhoven, Netherlands


High Tech Campus 9

5656 AE Eindhoven

Tel.: +31 (0) 40 85155-40

Building of FAULHABER Austria GmbH, Wien, Austria


Modecenterstraße 22/C89

1030 Wien

Tel.: +43 1 7963149-0

ERNTEC Pty. Ltd.

15 Koornang Road

Scoresby, VIC 3179

Tel.: +61 3 9756 4000

Fax: +61 3 9753 4000

Building of Dr. Fritz Faulhaber GmbH & Co. KG, Schönaich, Germany



Faulhaberstraße 1

71101 Schönaich

Tel.: +49 7031 638 0

Fax: +49 7031 638 100

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FAULHABER is currently not represented in the selected country.

Please contact us with your request at

Jan-Christopher Mohr

Area Sales Manager

Tel.: +49 (7031) 638 158

Michael Schütte

Area Sales Manager

Tel.: +49 (7031) 638 456

Daniel Brönnimann

Area Sales Manager

Tel.: +41 (0) 79 570 0814

Rolf Leitner

Regional Sales Manager

Tel.: +41 (0) 79 422 3348

Rafael Steinemann

Area Sales Manager

Tel.: +41 (0) 79 932 1645

Brushless motor in Optics

SDSS stands for "Sloan Digital Sky Survey" and is a cooperative alliance of astrophysicists from around the world. Over the past year, they have already presented the largest 3D map of the universe and thereby marked a milestone in astronomical research. Equipped with numerous telescopes and other scientific instruments, the researchers are working constantly on a wide range of projects. The latest is SDSS V, which aims to enable another qualitative leap in the understanding of the physical processes in outer space. The project will make possible the "first spectroscopic observation of the entire sky in various astronomical dimensions of time in the optical and infrared light spectrum." In total, more than six million objects are to be targeted.

How planets are formed

Among the objectives of this endeavor is the reconstruction of the history of our home galaxy, the the Milky Way. Researchers plan to retrace the formation of the chemical elements, decrypt the inner workings of stars, examine the formation of planets and answer many of the open questions that remain with regard to black holes. Another aspect is the mapping of the interstellar gas masses of the Milky Way – a thousand times more precisely than previously – to describe the "self-regulating mechanisms of galactic ecosystems." The data related to black holes and for the measurement of the Milky Way are to be collected by two large-scale telescopes: Apache Point in New Mexico and Las Campanas in Chile. "With the dual perspective from the northern and southern hemisphere, we can view the sky in all directions," explains Jean-Paul Kneib, professor of astrophysics at Ecole Polytechnique Fédérale de Lausanne in Switzerland. "We have also used the two telescopes in the previous SDSS projects. With SDSS V we are now making a true quantum leap with regard to the efficiency of the observation and the amount of collected data."

Spotting supernova

Placed in the telescopes are optical fibers that are targeted at specific objects in the universe. Individual stars or the luminous accretion discs of black holes can be precisely observed and analyzed. "Previously, we had to have special plates fabricated for each of the different observation tasks. It took several weeks for each plate to be prepared. The mounting of the fibers was then secured in the plate by hand – a very complex and time-consuming process," reports Jean-Paul Kneib.

With the new technology developed specifically for SDSS V, the rearrangement of the fibers will take no more than a minute instead of weeks. Because now the fibers are adjusted by means of 500 small robots – referred to by the astronomers as “astrobots" – in each of the two telescopes. This also allows the researchers to respond immediately to unpredicted cosmic events.

If, for example, other telescopes discover a current event such as a supernova, one of the optical elements can be aligned with it with practically no time delay. This enables a detailed analysis of the physical-chemical processes within a time span of supernova development that was not previously possible with this type of instrumentation.

Brushless motor in Optics
Brushless motor in Optics
500 motorized robot units are mounted on the telescopic plate. They precisely align the optical fibers on the front extension with the individual objects to be observed.

With micrometer precision

Each of the astrobots consists of two slim cylinders arranged lengthwise with a curved extension at the front end. The rear, thicker cylinder is secured in the plate of the telescope. It forms the alpha unit and turns the central axis of the robot. Mounted eccentrically to the front of this is the beta unit. It likewise moves the fiber tips in the curved end in a circular path.

Through the combination of the two axial movements, the fiber tips can be freely positioned within a circular area. Each circle covered by one of the robots partially overlaps the circles of the adjacent units. In the detection range of the telescope, each point of the sky can thereby be automatically targeted.

Three optical fibers are arranged in each astrobot. One is designed for light in the visible spectrum and one for the infrared spectrum. The third is used for calibration. With its help, the fiber tips are moved into position in three steps with an accuracy of just a few micrometers: In a first rough alignment, the two motors turn until the fiber intended for the observation is directed at the target object with a deviation of, on average, 50 micrometers. A camera in the telescope that is directed at the front ends of the robots now detects the tip of the calibration fiber and measures its position. In two further positioning steps, the robot head is then moved into position with a precision of better than five micrometers.

Researching faster

"Because we save an enormous amount of time with the automatic alignment, we can observe many more objects and perform a corresponding larger number of individual measurements," explains Jean-Paul Kneib. "This effect is raised to an even higher power through the high precision.

The diameter of the optical fibers is one hundred micro-meters. The diameter of the light spot from an observed cosmic object that hits the telescope is just as big. The more exact these two small surfaces are aligned with one another the greater the light output we have for our measurements and the faster we obtain valid results."

The technical prerequisites for this extreme accuracy are provided by motors and gearheads from FAULHABER as well as the mechanics developed specifically for this application by FAULHABER subsidiary MPS. The two robot axes are driven by brushless DC-servomotors of the 1218 ... B series for the alpha axis and the 0620 ... B series for the beta axis. The first two digits of the type designation indicate the diameter of the microdrives: twelve and six millimeters. Their force is transferred to the robot mechanics by means of suitable planetary gearheads.

The robot mechanics used here were developed and constructed by MPS. Integrated encoders report the rotary position of the motors to the controller.

Brushless motor in Optics

Backlash-free precision

"To achieve the required precision, we had to eliminate the backlash in the system," explains Stefane Caseiro, who was responsible for the design of the components at MPS. The engineers accomplished this by, among other things, replacing the conventional coupling between the gearhead shafts and the mechanical axes of the robot with clamp connections and by installing a compression spring to make the gearhead backlash-free. "Finding the suitable springs alone took several months," recalls the MPS engineer.

The search for the right partner for this technical development took Professor Kneib's team less time. "There are not even a handful of manufacturers in the entire world who can produce the micromotors with the required quality and durability," says the astrophysicist. "FAULHABER was, of course, on the short list of companies from whom we requested a quotation. We had already worked together successfully with MPS in a prior project. The physical proximity to these specialists is, of course, also an advantage – it is located just an hour and a half drive from the university in Lausanne to MPS in Biel. In addition to the outstanding quality and the good mutual experiences, a very decisive argument was that FAULHABER, together with its subsidiary MPS, can supply everything from a single source."


1218 ... B

2 Pole Technology

Data sheet (PDF) Product details

0620 ... B

2 Pole Technology

Data sheet (PDF) Product details

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