# Linear_Actuators_and_Linear_Motion

Document Sample

```					Title:
Linear Actuators and Linear Motion

Word Count:
407

Summary:
Mechanical energy is an area of science that is making strides every day.
The study of how actuators produce mechanical motion by converting
various forms of energy into mechanical energy is a source of great
exploration...

Keywords:
linear motors rotary tables

Article Body:
Mechanical energy is an area of science that is making strides every day.
The study of how actuators produce mechanical motion by converting
various forms of energy into mechanical energy is a source of great
exploration. Science finds new ways to make use of actuators every day
including for medical purposes. Many scientists believe that the more
they study these seemingly simple machines, the more they will discover
ways of helping mankind.

The way in which a linear actuator works is that there is a motor that
rotates a drive screw using a synchronous timing belt drive. Some linear
actuators can also use a worm gear drive or direct drive. Which ever the
choice, the turning of the screw pushes a drive nut along the screw,
which in turn pushes the rod out and the rotating the screw in the
opposite direction will retract the rod. According to the Association of
Sciences, the drive screw is either an ACME or ball thread or is belt-
driven which is what gives the machine its motion. A cover tube protects
the screw nut from environmental elements and contamination thus allowing
for the machines use continually without the chance of it getting gummed
up. Radial thrust bearings permit the screw to rotate freely under loaded
conditions and gives the linear actuator its strength.

Linear actuators usually serve as part of motion control systems. These
days most are run by computers. Control systems, a device that you find
linear actuators in, move or control objects. This is made possible by
the actuators.

There are various forms of energy that run actuators. These forms of
energy include, hydraulic, pneumatic, mechanical and electrical. Linear
actuators are used a lot in robotics and factory automation.

Linear motion is when an object moves in a straight line. This is the
basic concept that drives the linear actuator. One has to stop and
consider when choosing a linear actuator which type they need to fit the
purpose of their project. Some things to keep in mind are the speed,
stroke length and load rating of the actuator. Programmability of the
actuator is also a factor especially when the application will be one
that requires specialized detail. A linear actuator can be used in just
about any forum. Ask yourself some questions when attempting to choose
the right one for your project such as are there particular safety
mechanisms required, environmental concerns to be addressed or space
issues?

```
DOCUMENT INFO
Shared By:
Categories:
Stats:
 views: 16 posted: 12/26/2010 language: English pages: 2
Monika Kamal Jesus http://ineed4u.blogspot.com/
About Getan Pro. Doc. For Free