Page 3 - Exlar - TRITEX linear and rotary electric actuation
P. 3
Linear Applications to the linear motion required In addition, the Tritex soft-
Tritex linear actuators employ to move the load. ware allows you to create a
The Tritex linear
Exlar’s patented, inverted roller actuator contains sequence which causes the
screw mechanism for converting the same control actuator, when commanded,
the rotational motion generated capability of the to move forward while press-
within the Tritex actuator Tritex rotary ing an object into position.
to the highly actuator. (See You can establish a pre-pro-
grammed force which triggers
robust and previous page.) an event (such as stopping or
long-life
linear 0OWER retracting to another position)
motion or it can maintain that force
required level until commanded other-
to solve #OMMAND wise. The sequence is ideal
applications for assembly, test, fastening
3ERVO
that previously !MPLIFIER and pressing applications.
required pneumatic or hydraulic
cylinders. No additional mecha- 23 As with the rotary Tritex,
nisms (such as acme or ball Conventional the linear Tritex can be
screws) are necessary to con- Linear Servo programmed to follow an
vert the actuator’s rotary power System analog command signal,
making it ideal for controlling
valves and dampers in pro-
cess control applications.
Tritex Actuator
0OWER #OMMAND "ALL 3CREW
23 &EEDBACK 07- 0OWER )NSIDE
!MPLIFIER 2OLLER -OTOR 3ERVO #OUPLING ,INEAR
3CREW -OTOR !CTUATOR
Roller Screw Basics The difference is in the roller
Exlar’s patented, inverted roller screw’s design for transmitting
screw is a mechanism for con- forces. Multiple threaded heli-
verting rotary torque into linear cal rollers are assembled in a
motion, in a similar manner to planetary arrangement around
acme screws or ball screws. a threaded shaft as seen below,
But, unlike those devices, roller which converts a motor’s rotary
screws can carry heavy loads motion into linear movement of
for thousands of hours in the shaft or nut. Compare a similar size ball
the most screw to Exlar’s planetary
roller screw design and see
many more contact points
arduous on the roller screw. This
conditions. This results in up to 15 times the
makes roller screws the load-carrying capacity of
ideal choice for demanding, ball screws and improved
continuous-duty linear motion stiffness.
applications.
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