Page 4 - Exlar - Exlar electric test and simulation actuator systems

The Challenge research and creativity is a revo- on industrial equipment
lutionary design which incorpor-
ranging from carpet weaving
ates a high performance machines and machine tools, to
For years, industry has sought
out a clean and effi cient all- brushless servo motor with a simulation and test equipment
electric alternative to hydrau- novel mechanism for converting and submarines. All actuators
portray the unique characteristics
the motor’s power and speed to
lic and pneumatic cylinders. highly accurate and reliable linear of producing the power density,
The promise of such a device motion. speed and robustness of hy-
would be the elimination of the
environmental issues associ- draulic and pneumatic actuation
ated with hydraulic fl uids, the The Result — Since delivering without the inconvenience and
the fi rst actuator to the world’s
operating expense of fl uid power.
noise and inconsistency of leading liquid packaging com-
pneumatics, and a dramatic pany in 1993, the company has
reduction in power consump-
tion. Today, process engineers supplied over 10,000 units of
are facing increasing demands this elegant but simple device
for producing precise, yet highly
for more accurate and better robust linear robust linear mo-
responding position control. tion. Exlar’s inverted roller screw Epoxy-coated
These trends are driven by Aluminum Housing
regulatory controls for cleanli- actuators are being used today
ness and effi ciency combined
with the market’s demand for
more accurate control of their
processes. Engineers have Threaded Rollers
universally agreed that the
solution for addressing both
these needs lies in an an all- Preloaded Angular
electric actuator. The chal- Contact Bearings
lenge has been to build such
a device which delivers the
promises of electric actuation,
yet maintains the robustness
and moderate cost of fl uid
power actuators. Chrome Plated
Extending Rod
The Design — To meet this
challenge, Exlar embarked on
a mission to create a new kind
of electrical actuator. Tradi-
tional ball and acme screws
were rejected due to their
lack of robustness and limited
service life when used in con-
tinuous motion applications.
Direct acting electric actuators
were found to be prohibitively
expensive, energy ineffi cient, Sealed Output Rod
and lacking the stability and
stiffness needed to ensure ac-
curacy. The result of Exlar’s

4