Linear motion is practically present everywhere today. Whenever you’re operating with something that needs to be pushed and pulled, or simply move in a straight linear line, you’re making linear motion possible.
All the kitchen appliances and so much more, not to mention locking and unlocking modern cars and even opening and sliding side doors to a van.
All of that is achieved by linear motion, which is also considered a general motion, because it allows for objects to move in a predictable way.
But to achieve this type of motion, something has to be able to actuate it. And that’s where linear actuators are needed.
In the following article we aim to explain in the simplest way, how to achieve precise and reliable results when operating with these tools and which gadgets will make your life easier.
There are 4 different types of motion in general, which are:
- linear motion
- rotary motion
- oscillating motion
- reciprocating motion.
We will be focusing on linear motion, because it is most commonly used and lots of results can be achieved using this technique.
Details that will help achieve more precise linear motion
Accuracy, repeatability and precision are the most wanted factors when it comes to linear motion. Those can be hard to achieve even for some engineers, unless of course the parts of the linear actuator weren’t custom designed and made to suit certain specifics.
Choosing the right linear actuator might be difficult as well. Most linear actuators that give poor performance results were a wrong choice in the first place. It is easy to make mistakes if you make specification errors.
When choosing the absolute appropriate linear actuator, consider these 4 elements:
- structural system
- rotary to linear motion converter
- linear wear element
- moving carriage.
Structural system should accurately secure all components of the actuator and provide methods that will keep it in place all the time.
A converter that will transform rotary motion into linear consists of a series of drives for individual components.
Linear wear element helps accurately guide the carriage linearly with minimal to none friction taking the maximum load capacity.
Moving carriage serves to hold safely workpieces that are being handled.
When all above mentioned facts are considered, to achieve best linear motion results, you need to notice several important details that will help you choose a linear actuator that will provide most predictable and reliable outcomes.
Choosing the right linear actuator
Accuracy and repeatability
Out of the two, repeatability is way more important. It can be directional or bidirectional and it measures the system ability to achieve a precise or accurate position when approached in either of the directions
Accuracy is defined by travel and positioning and it is usually measured in microns.
Capacity
Internal construction of a linear actuator directly impacts the capacity of the load. It is of utmost importance that you know the application details, therefore also the load capacity that will be required. There are linear actuators that are built to handle heavy loads at high speeds and others built to support light loads at high speeds.
For example, an industrial linear actuator will handle maximum load capacity and provide high stiffness, ensuring the load is always precisely positioned in the actuator.
There are different types of capacity:
- static load capacity
- dynamic load
- thrust
- bending moment capacity.
Travel length
Also known as the distance the object will be required to move, travel length must include a safety stroke. When choosing the appropriate linear actuator it is important to know the difference between a stroke and overall length of the trip.
Usage
Or otherwise known as the duty cycle is measured in cycles per minute. It describes how frequently the actuator will run and how long it will last. It also helps organize a maintenance schedule. It would be best to inquire with the supplier about the maintenance needs. For example, some actuators require lubrication after 20 000 km, which makes them low maintenance ones.
Surroundings or environment
Conditions in which the actuator is operated are also known as ambient environment. Neglecting some of the conditions before starting the work can be hazardous, that’s why we suggest you consider the following:
- humidity range
- amount of contaminant particles
- corrosive fluids or chemicals
- temperature range while operating the actuator
- cleaning and maintenance
There are ways to protect the actuator in extreme environment conditions with special seals and bellows. Those will keep dust, humidity and other disturbances away.
Orientation
Otherwise known as the factor that determines how the actuator will be mounted in the operating space. It also defines how the loads and forces will be oriented during linear motion. Every single orientation will influence the amount of force needed to carry a certain load.
Choosing the right linear actuator isn’t that hard. It just takes some time to define all the details surrounding the work and desired results. However, you should take all the time you need to make the right decision because being hasty will not bring the best results.
Conclusion
Linear actuators (https://www.tuli-shop.com/linear-motion-products/linear-actuators) make linear motion possible. It is as simple as that. Depending on the work that needs to be done, the load that will be moved linearly, temperature of the work space, amount of humidity and many others, choosing the right actuator can be a hassle.
That’s why experts suggest one place for all linear needs and that is the best equipped online web shop for tools and gadgets to make your work easier, Tuli.
Specialized in making all manual labor easier, Tuli.hr is known for best prices on the market, delivery results and outstanding customer support.
