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GPC Y ASOCIADOS S.A.

Veléz Sarsfield 201640 Martinez

Buenos Aires

Tel.: +54 (9) 11 5993 8719

info@gpcasoc.com.ar

Horne Technologies cc

PO Box 536

Betty's Bay, 7141

Tel.: +27 (0)76 563 2084

info@hornet.cc

www.hornetechnologies.co.za

FAULHABER MINIMOTOR SA

Zona Artigianale 8, Madonna del Piano

6980 Croglio

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

info@faulhaber.ch

Gebouw van FAULHABER MICROMO LLC, Wien, Austria

FAULHABER MICROMO LLC

14881 Evergreen Avenue

Clearwater, FL 33762-3008

Tel.: +1 (727) 572 0131

marketing@micromo.com

www.faulhaberUSA.com

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

info@nrc.com.tw

www.nrc-precidrives.com

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

info@edelteknoloji.com

www.edelteknoloji.com

FAULHABER Asia Pacific Pte Ltd.

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

Singapore 408730

Tel.: +65 6562 8270

info@faulhaber.com.sg

Compotech Provider AP

Gustavslundsvägen 145, 4 tr

167 51 Bromma

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

info@compotech.se

www.compotech.se

MICROPRIVOD Ltd.

56 (bldg. 32), Shosse Enthusiastov

111123 Moscow

Tel.: +7 495 2214 052

info@microprivod.ru

www.microprivod.ru

FAULHABER Polska sp. z o.o.

Ul. Górki 7

60-204 Poznan

Tel.: +48 61 278 72 53

info@faulhaber.pl

Staubo Elektro-Maskin a.s.

Bjørnerudveien 12C

1266 Oslo

Tel.: +47 22 75 35 00

post@staubo.no

www.staubo.no

FAULHABER Malaysia Sdn Bhd

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

11950 Bayan Baru · Penang · Malaysia

Tel.: +60 4 619 2570

info@faulhaber.my

Swiss Amiet Co., Ltd.

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

Yeongdeungpo-gu,07217, Seoul

Tel.: +82 (0) 2 783 4774

info@swissamiet.com

www.swissamiet.com

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

motor-info@shinkoh-elecs.co.jp

www.shinkoh-faulhaber.jp

FAULHABER Italia S.r.l.

Via Cavour 2

22074 Lomazzo CO

Tel.: +39 0236714708

info@faulhaber-italia.it

Inteltek Automation JV

S.No. 100/5, Ambegaon

Pune - 411046

Tel.: +91 (0) 20 39392150

info@inteltekindia.com

www.inteltekindia.com

Lewenstein Technologies Ltd.

1 Ha'arava St. Givat Shmuel

5400804 Israel

Tel.: +972 3 9780 800

info@l-tech.co.il

www.l-tech.co.il

Electro Mechanical Systems Ltd.

Eros House, Calleva Industrial Park, Aldermaston

Reading, RG7 8LN

Tel.: +44 (0) 118 9817 391

info@ems-ltd.com

www.ems-limited.co.uk

FAULHABER France SAS

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

78180 Montigny-le-Bretonneux

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

info@faulhaber-france.fr

www.faulhaber.com

ELMEQ Motor

Passeig Ferrocarrils Catalans 178

Cornellà de Llobregat 08940 (Barcelona)

Tel.: +34 93 422 70 33

marketing@elmeq.es

www.elmeq.es

MOVETEC OY

Suokalliontie 9

01740 Vantaa

Tel.: +358 (0) 9 5259 230

info@movetec.fi

www.movetec.fi

Routech s.r.o.

Dr. Milady Horákové 185/66

460 06 Liberec

Tel.: +420 489 202 971

info@routech.cz

www.routech.cz

Compower ApS

Marielundvej 29

2730 Herlev

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

info@compower.dk

www.compower.dk

Marte Científica e Instrumentação Industrial Ltda

Av Fco Andrade Ribeiro 430

37540-000 Santa Rita do Sapucai, MG

Tel.: +55 (11) 3411 4500

motores@marte.com.br

www.marte.com.br

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

info@faulhaber.cn

FAULHABER Benelux B.V.

High Tech Campus 9

5656 AE Eindhoven

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

info@faulhaber.nl

FAULHABER Benelux B.V.

High Tech Campus 9

5656 AE Eindhoven

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

info@faulhaber.be

FAULHABER Austria GmbH

Modecenterstraße 22/C89

1030 Wien

Tel.: +43 1 7963149-0

info@faulhaber-austria.at

ERNTEC Pty. Ltd.

15 Koornang Road

Scoresby, VIC 3179

Tel.: +61 (0) 3 9756 4000

sales@erntec.com.au

www.erntec.net

Headquarter

DR. FRITZ FAULHABER GMBH & CO. KG

Daimlerstr. 23

71101 Schönaich

Tel.: +49 7031 638 0

Fax: +49 7031 638 100

info@faulhaber.de

www.faulhaber.com

Jan-Christopher Mohr

Area Sales Manager

Tel.: +49 (7031) 638 158

jan-christopher.mohr@faulhaber.de

Daniel Brönnimann

Area Sales Manager

Tel.: +41 (0) 79 570 0814

daniel.broennimann@faulhaber.ch

Michael Schütte

Area Sales Manager

Tel.: +49 (7031) 638 456

michael.schuette@faulhaber.de

Beijing Office

East 10H3 Wu Mart Huike Mansion Building, No. 158 W. 4th Ring Road North

Haidian District, Beijing 100097

Tel.: +86 (0)10 5335 9353

info@faulhaber.cn

Guangzhou Office

Room 1415, No. 5 Fuchang Road

Haizhu District, Guangzhou, 510240, Guangdong Province

Tel.: +86 (0) 20 3424 8332

Fax: +86 (0) 20 3424 8332

info@faulhaber.cn

Xi‘an Office

Room A-509, No. 318 Yanta Road South

Qujiang New District, Xi’an 710061, Shaanxi Province

Tel.: +86 (0) 29 8521 2778

Fax: +86 (0) 29 8521 2778

info@faulhaber.cn

Hong Kong Office

Unit 4, 19/F, Ricky Centre, 36 Chong Yip Street

Kwun Tong, Kowloon

Tel.: +852 3520 2078

Fax: +852 3914 7452

info@faulhaber.cn

[Translate to Netherlands:]

Gearheads

Find additional information about gearheads and their application. If you need assistance during commissioning of any of these gearheads try and contact our support here. If you need a quotation or general information about our gearheads like a thermal calculation please contact our sales or info[at]faulhaber.com.

FAQ

Are all of your gearheads reversible?

Yes, our planetary gearheads and spur gearheads allow for bidirectional operation.

Why are the gearheads not correctly matched to the motor from a torque standpoint?

If the maximum continuous torque produced by the motor through the gearhead is considered for each gearhead ratio, many ratios would far exceed the gearhead torque rating. If we were to design each gearhead to withstand the full torque produced by the combination, the gearhead's internal gears would have to be modified dramatically (larger face width, larger pitch diameter, different material, etc.). All these would contribute to a much larger and more expensive product that defeats the intent of having the "power and performance in the smallest package."

How do I know whether to use a planetary or spur gearhead?
Planetary gearheads are typically used when high torques are needed in a limited space. Spur gear systems are used where low current consumption, low noise, and high efficiencies are needed. The negative tradeoffs for using planetary gearboxes are higher current consumption, lower efficiency, and higher audible noise.
How can I calculate the final operating conditions (current, speed, etc.) for a motor + gearhead combination given the torque load at the output shaft of the gearhead?

To give you a generalized example, assume that the motor + gearhead combination 1724T012SR + 16/7, 43:1 is being used with 12 Volts applied to the motor terminals, and that a torque of  71 mNm is desired at the output shaft of the gearhead.

Gearhead 16/7 with a 43:1 gear ratio has a data sheet efficiency value of 70%. This means that 30% of the torque developed by the motor will be lost in the gearhead. The simplest method of accounting for gearhead losses is to increase the torque requirement by the appropriate amount and make the calculations as if the gearhead were 100% efficient. In this case, we increase the torque requirement at the gearhead output by 30% resulting in a torque (for calculation purposes) of 92 mNm.

Total torque = 71mNm x 1.3  = 92 mNm.

The torque reflected back to the motor is then simply the total torque divided by the gear ratio:

Motor torque = 92 mNm / 43 = 2.1 mNm

The motor torque constant is the proportionality constant which defines the relationship between the torque at the motor shaft and the current in the motor windings. In this case, the torque constant for the motor 1724T012SR is 14.3 mNm/A. That is, for every 1 A in the motor windings, the motor will produce 14.3 mNm of torque. The reciprocal of the motor constant in this case is .070 A/mNm. Since we have already calculated the torque at the motor shaft to be 2.1 mNm, we can use the reciprocal of the torque constant to calculate the motor current due to the external load:

Current = .070 A/mNm x 2.1 mNm = 147 mA

The motor has a small amount of internal friction which requires a proportionate amount of current to drive it. This current is defined as the motor no-load current. In this case, the value is 8 mA (taken from the data sheet). Since the motor requires 147 mA to drive the external load and 8 mA to drive its own internal friction, the total current required for this application would be 155 mA.

The speed of a DC motor is a linear function of the load which it is driving. The proportionality constant relating motor speed to the motor torque load is the slope of the torque versus speed curve. This slope is calculated by dividing the listed no-load speed of the motor (speed at nominal voltage and zero external load) by the stall torque (zero speed and maximum torque). In the case of motor 1724T012SR, the slope of the torque versus speed curve is given by the following:

Slope = DY/DX = -7900 rpm / 10.5 mNm = -752 rpm / mNm

Note that the slope of the line is a negative value, indicating that the speed losses will be greater with increasing motor load. In this case, we calculated a motor load of 2.1 mNm. Therefore, the motor speed loss due to this external torque load will be:

Speed loss = -752 rpm / mNm x 2.1 mNm = -1579 rpm

With no load on the motor shaft, the motor speed will be 7900 rpm. With a load of 2.1 mNm, the motor will lose 1579 rpm from the no-load value. Therefore, in this application the motor speed is rendered by:

Motor speed = 7900 rpm - 1579 rpm = 6321 rpm

The speed of the motor at the output shaft of the gearhead under load is simply the motor speed divided by the gear ratio. In this case:

Output speed = 6321 rpm  / 43 =  147 rpm

We accounted for the power losses in the gearhead at the beginning of this exercise, so we need not be concerned about this factor again.

If you want help working out your particular application, please contact us.

What other Precision Gearhead Application Considerations should I be aware of?

A full range of planetary and spur gearheads are available to go with our micro motors. With a few exceptions, the input gears of most gearheads are plastic to reduce noise at high speed. All metal input stages are available for high torque applications. In addition to our standard product range, many options are available to suit individual applications requirements.

In selecting a gearhead, one must be mindful that gearbox selection will impact more than just the output speed and torque level at the output shaft. Some of the considerations to keep in mind should include:

Backlash: Backlash is a characteristic of gearhead and gear train construction that allows bidirectional shaft play. It can be caused by generous tolerances in gear design, tooth wear over time, slight machining errors in the gear cutting process, etc. It is measured at the output shaft of the gearhead and can vary typically from 1-7 degrees. Backlash is load dependent and will increase as the load increases. Backlash can cause significant error in positioning system and should be compensated for.  Typically, shaft encoders are mounted on the motor shaft and not the output gear shaft of small DC gear-motors. This means that the motor armature position can be different than the expected position of the  output gear shaft by the level of backlash in the gear. 3 degrees at the output shaft of a gearhead could mean hundreds of encoder pulses at the motor depending on the resolution of the encoder and the ratio of the gearhead. For example, if you are using a 512 pulse shaft encoder and you have a gearhead ratio of 43:1, 3 degrees of backlash at the gearhead output shaft could mean up to 183 encoder pules of error systematically.

Backlash can be eliminated in 1 direction by placing load tension on the shaft before initiating a move. For more dynamic bidirectional applications backlash can be compensated for electronically by using an external absolute encoder for comparison to the shaft encoder. The motion control electronics can the be programmed to correct position error. FAULHABER also offers zero backlash gearheads to eliminate backlash mechanically. They are dual pass spur gearheads in which the individual passes are preloaded against one another thereby eliminating shaft backlash. Consult with a FAULHABER applications engineer about eliminating backlash in your application.

Bearing Choice: Ball bearings are typically specified in applications where high radial and axial shaft loads are present. Be advised, however, that using ball bearings can increase audible noise in some cases. Please refer to the gearhead datasheet for shaft loading specifications. Sintered bearings are available for lower torque applications characterized by lower radial shaft loading and constant load characteristics. Ceramic bearings are an alternative for cost-sensitive applications in which extended life and enhanced radial load-bearing capabilities are important. FAULHABER has developed a proprietary series of ceramic sleeve bearings. These bearing systems allow the user to increase radial loads beyond the levels allowed in traditional sintered bronze bearing systems. Costs of the ceramic bearings are also considerably below that of ball bearings.

Care should be taken when press fitting components to a gearhead output shaft. We recommend not exceeding the press fit force ratings specified in the gearhead datasheet. This can damage the bearings and the internal gears themselves. In some cases, gearhead shaft bearings (ball bearings only) are preloaded with a small wave washer under the retaining ring on the bearing. Exceeding the press fit force specification on the datasheet can damage this wave washer and negate the preload on the bearing. This will effect the performance of the bearing and should always be avoided.

Lubrication: The gear and bearing lubrication can be a defining factor in gearhead performance. All FAULHABER brand gearhead bearing systems and gear trains are lubricated for life. Re-lubrication is not needed, and is not recommended. The use of non-approved lubricants on or around the gearheads or motors can negatively impact their function and life expectancy. The standard lubricants for reduction gears are formulated to provide optimum life performance with minimum current consumption at no-load condition. For extended life and severe performance requirements, all metal gears and special heavy duty lubricants are available. Specially lubricated gearing systems are also available for extended temperature and vacuum environments. Contact a FAULHABER applications engineer to discuss modifying the lubrication for special environmental requirements.

Input Speed and Direction of Rotation: The input speed specification on the FAULHABER precision gearhead datasheet refers to the input speed recommended in order to maximize gearhead life. This specification is not intended to limit the gearheads to input speeds below the specification. It can be considered to be a safe mean value for operation. Your application may not require the maximum lifetime performance of the gearhead and this input speed specification may be safely exceeded depending on the performance requirements. Contact your FAULHABER application engineer for assistance if you have any questions on the gearhead input speed. All gearheads offered by FAULHABER are reversible. In the datasheets you may see an equal or not equal symbol. Don't let this confuse you. This simply means that when positive voltage is applied to the positive terminal of the motor and negative to the negative terminal that the output shaft of the gearhead, depending on the ratio, is equal to the direction of rotation of the motor or is not equal to the direction of rotation of the motor. If you have any question on any of the specifications in our datasheets, don't hesitate to contact one of our application engineers for assistance.

Blocking, Stalling, and Backdriving: In general we do not recommend that our gearheads are blocked while the motor is under power. Due to the wide range of ratios available for gearheads and it is highly probably that the motor has enough power, even at low current, to "overpower" the gearhead if it is blocked or stalled. This means that the torque generated at the motor is enough to strip the gears in the later stages of the gearhead or even to shear off the output shaft. Careful consideration should be paid to setting up the appropriate current limits in an application if the gearhead must be blocked to stop it.

Backdriving our gearheads is not recommended. Backdriving means that a torque is applied to the gearhead output shaft which in turn will reverse drive the input stages of the gearhead. This can damage the gearhead in a myriad of ways including causing it to jam or simply breaking off the output shaft.

Webinars

Best use of gearheads

English

This webinar will give you information on different gearhead technologies used in FAULHABER drive systems. In 45 minutes you will discover what is behind the reduction ratio of a gearhead, what are ...

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Best use of gearheads

German

This webinar will give you information on different gearhead technologies used in FAULHABER drive systems. In 45 minutes you will discover what is behind the reduction ratio of a gearhead, what are ...

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Drive systems for space applications

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In this webinar, our expert will drive you through our experiences in space applications, starting with an overview about space economy and the importance of commercial off the shelf products in this ...

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Noise Emission with small Drive Systems

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In this webinar, our expert will tell you everything there is to know about vibrations and noise in a drive system, what causes it and how these issues can be addressed. Starting with the basics of ...

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Designing drives with the FAULHABER Drive Selection Tool

English

Are you unfamiliar with our products but have specific requirements in terms of operating mode and load parameters, such as the speed and torque? Our versatile FAULHABER Drive Selection Tool allows ...

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Designing drives with the FAULHABER Drive Selection Tool

German

Are you unfamiliar with our products but have specific requirements in terms of operating mode and load parameters, such as the speed and torque? Our versatile FAULHABER Drive Selection Tool allows ...

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Drive System Technology Selection

English

In less than 45 minutes, our webinar will get you set to select the right system for your application, based on your specific requirements and desired product characteristics. Our expert will make ...

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Drive System Technology Selection

German

In less than 45 minutes, our webinar will get you set to select the right system for your application, based on your specific requirements and desired product characteristics. Our expert will make ...

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