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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

We are sorry

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

Miniaturized Motion Control Technology for the World's Largest Pair of "Binoculars"

The most powerful standalone telescope in the world will be put into operation on Mount Graham in the US state of Arizona in 2004.
The astronomers are particularly interested in setting sights on distant galactic systems, young double stars and newborn suns. In principle, this Large Binocular Telescope (LBT), which has a height of over 20 m and weighs over 600 t, is an outsized pair of binoculars. Its two reflectors each have a diameter of 8.4 m and together they make up an approx. 100 sq. m dish for collecting light. In this way it can even collect the radiation from weakly illuminated objects at the limits of the universe being observed. The interaction of the two reflectors mounted 14.4 m apart provides the telescope with a resolution that would correspond to that of a pair of binoculars having a diameter of 23 meters. Each reflector resembles a giant "honeycomb" made from borosilicate glass and weighs 15.6 t.

Miniaturized Motion Control Technology for the World's Largest Pair of "Binoculars"

Interference is the key to higher-definition images

The design of the telescope and its integrated optical systems provides scientists with a high level of flexibility when making their observations. That way they can use each of the reflectors independently of one another to view the same object, but also study different objects by tilting the viewing axes slightly, or use both reflectors to observe the same object at maximum resolution. They are assisted by a physical trick:
In order to achieve the unusually high definition, the rays of light reflected by each reflector are superimposed, i.e. brought to a state of interference. Consequently, the resolution is nearly ten times better than with conventional standalone telescopes. However, the requirement that has to be met to ensure the LBT works smoothly is that individual components made in the three partner countries - the US, Italy, and Germany - interact without any problems. Furthermore, they have to operate properly at the site of use under adverse conditions. After all, Mount Graham is approx. 3,300 m high. The climate at that altitude is characterized by temperatures below freezing, a very high humidity of up to 90%, as well as extreme temperature fluctuations.

Positioning unit for interference generation

If a high-resolution image is to be created by the generation of interference, the optical assemblies that are attached to the two reflectors for bundling and superimposing the reflected light have to be positioned with an accuracy of 5 µm. For this purpose, the Feinmess company in Dresden (Germany) developed a three-axis positioning system that moves the appropriate optical system on the two reflectors of the LBT into the correct position. Horizontally, distances of up to 200 mm have to be covered (longitudinal positioning), and vertically - for focusing purposes - there are distances of up to 50 mm. At the same time the optical assembly has to be rotated through an angle of up to 36 degrees. In order to ensure the required positioning accuracy, the system has to operate with as little play as possible. That is why great importance is accorded to the drives on the spindles.
In this case, drive solutions from FAULHABER were selected. The traditional bell-type armature motor with coreless rotor coil provides an excellent basis for such fields of application. The small DC drives operate reliably even under hostile ambient conditions. They can cope with ambient temperatures between -30°C and +125°C and are not even affected by a high level of humidity (up to 98%) when specified appropriately. An important basic criterion for motor selection was also instant, high-torque starting for the DC motor after application of voltage. That ensures a direct response to control signals. The coreless copper coil allows an extremely lightweight motor design with a high efficiency of up to 80%. The motors used on all three spindles of the positioning system have a diameter of 26 mm and are only 42 mm long; at speeds of up to 6,000 rpm they provide a power output of 23.2 W.

Miniaturized Motion Control Technology for the World's Largest Pair of "Binoculars"

Motor, gearhead, and pulse encoder – a compact unit

In the application described above the motors were combined with two-stage planetary gearheads that have a ratio of 16:1. Flanged to the end of the motor, their performance is extremely impressive, not only due to their compact design but also because of their steady running and durability. Gearhead backlash was optimized for use on the positioning system. Instead of the values of about 1 degree, customary on standard gearheads, these planetary gearheads have a backlash of only 12 angular minutes, measured at the output shaft.
Knowing the actual position of the motors is an essential prerequisite for precision positioning. With the positioning systems employed on the LBT it is detected at each motor by an optical pulse encoder that generates 500 pulses per revolution. Using a metal disk, a transmitted-light system generates two phase quadrature output signals. The index pulse is synchronized with output B For each of the three channels there are inverted complementary signals. The pulse encoder is fitted to the free end of the motor shaft and fixed with three screws. Supply voltage for the pulse encoder and the miniature DC motor and the output signals are connected via a ribbon cable and a 10-pin connector. Since the drive units, comprised of the motor, gearhead, and pulse encoder, are extremely compact, they are easy to integrate into three-axis positioning systems. Miniaturized motion control technology thus plays an instrumental role in enabling the LBT to open up a new dimension in astronomical research.

No cogging
Smooth position and speed control
High efficiency
Low Noise
High Torque
Low Weight
Very low rotor inertia
Dynamic start-stop operation

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