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ALLEN-BRADLEY

AC SERVO MOTORS

ALLEN-BRADLEY

AC SERVO MOTORS

Allen-Bradley began its existence as the Compression Rheostat Company in 1903. It was founded
by Lynde Bradley and Dr. Stanton Allen and the company changed its moniker to feature the
founders’ names in 1909. The company flourished with the expansion of the radio industry and
in supplying the military with various electronic equipment during World War I and World War II.

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FANUC

AC SERVO MOTORS

FANUC

AC SERVO MOTORS

FANUC originated as a part of Fujitsu in the 1950s. The name FANUC is an acronym for Factory
Automation Numerical Control. In 1972, FANUC manufactured their first computer numerical control
(CNC) and have continued to manufacture and innovate in the fields of automation and robotics to
this day.

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INDRAMAT

INDRAMAT

Indramat was a German manufacturer of industrial control equipment founded in 1958. The name
Indramat is an abbreviation that comes from the words “INdustrialization, RAtionalization, and
autoMATion.” Indramat manufactured and sold servo motor equipment through the Sixties and
Seventies, offering AC servo motors as early as 1979. Over the years Indramat was acquired by
Rexroth, then Mannesmann, and finally by Bosch in 2001.

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SIEMENS

AC SERVO MOTORS

SIEMENS

AC SERVO MOTORS

Siemens offers a range of servo motor products for use in control application and among these
are numerous brushless servo motors. Servo Repair International can apply our knowledge, skills,
and replacement capabilities to support Siemens end users and keep their motors and systems
operational.

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KOLLMORGEN

AC SERVO MOTORS

KOLLMORGEN

AC SERVO MOTORS

Kollmorgen was founded in 1916 by Otto Kollmorgen to manufacture periscopes many of which were
sold to the US Navy. In the 1960’s Kollmorgen expanded its business into the industrial control
market by acquiring Inland Motors Corporation and others. Later, PMI became another motion
control brand owned by Kollmorgen. Kollmorgen itself was acquired by Danaher in 2000.

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YASKAWA

YASKAWA

Yaskawa Electric Corporation was founded in 1915 as a manufacturer of electric motors The
company has continued to manufacture electric motors to this day while also expanding into motion
control, robotics, system engineering, and information technology. Yaskawa was among the
manufacturers in the Seventies and Eighties who had a part in the expansion of the servo industry
and they still manufacture servo products under the Yaskawa name.

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KOLLMORGEN

DC SERVO MOTORS

KOLLMORGEN

DC SERVO MOTORS

Kollmorgen was founded in 1916 by Otto Kollmorgen to manufacture periscopes many of which were
sold to the US Navy. In the 1960’s Kollmorgen expanded its business into the industrial control
market by acquiring Inland Motors Corporation and others. Later, PMI became another motion
control brand owned by Kollmorgen. Kollmorgen itself was acquired by Danaher in 2000.

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PMI-KOLLMORGEN

PANCAKE / DISC ARMATURE SERVO MOTORS

PMI-KOLLMORGEN

PANCAKE / DISC ARMATURE SERVO MOTORS

PMI Motion Technologies was the US arm of Printed Motor Works which was the first to make
"pancake" motors in the 1960s. PMI was sold to Kollmorgen in the 1970s and then was
collectively acquired by Danaher in the 1970s. Printed disc motors offer several benefits to
traditional motors; their size and shape is an obvious one, however printed disc motors have the
ability to accelerate rapidly, maintain peak torque longer and change direction faster than
traditonal styles of servo motors, all without torque ripple that is present in all other styles of
electic motors.

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SEM

SEM

SEM founder Henry F. Joel had already been manufacturing electrical devices for several years
when SEM was incorporated in 1914. Since the Seventies SEM has focused primarily on producing
servo motors. SEM does not manufacture their own control devices, allowing machine builders and
other distributors to pair SEM’s motors with their own drives.