Linear Actuator Basics and How ToAre you new to actuators? Have you just learned what an actuator is? You're not alone, and we're happy to help! This page is for you, and we will try to include all the information we can that you need to make an educated decision when selecting what actuator is right for you. Also, we will be sure to update this article regularly with any information we think will be helpful.
Many people, rather, most people have never needed to use an actuator before, and typically refer to them as 'rams', 'activators', 'electric pistons', or other wild variations. All in all, they all mean the same thing, and we don't mind if you don't like using the technical terms. First thing to know, is that a linear actuator does exactly what its name implies: it actuates (or 'moves') in a linear (or 'straight') fashion.
There are many different ways that a motor can do this, and their motion is commonly achieved with a rod extending and retracting, or a slider which moves on a track. Uses for these linear motors widely vary, and they can be used on everything from TV lifts (including drop down lifts), wheelchair ramps, industrial machinery, toys, and even aerospace technology. Firgelli Automations is a proud supplier for hundreds of companies in the above sectors and more for over twelve years. In these years, we've learned a thing or two about what first-timers want to know. This will be a regularly updated article with all the links and videos you could possibly need to start your own project with actuators.
What Actuator Should I Use?With such a selection of actuators we manufacture, it can be very easy to get confused and frustrated if you don't know anything about electric motors or actuators in particular. Typically when helping a new client choose the right unit for his or her application, we will ask the following:
- What are you using it for?
- How much force do you need?
- How much stroke ('travel') do you need?
- How fast do you need it to move?
- And finally, how often do you need it to do this?
- Track Actuators - Used for tight spaces where a sliding block is ideal due to its unchanging retracted and extended length.
- Rod-Style Actuators - These are the most common actuators you will find, and simply feature a shaft which extends and retracts, providing linear motion.
- Feedback Actuators - For applications which have systems to read the actuators' position, these potentiometer pod equipped actuators are ideal; they provide accurate information for precise control over your application.
How Long Should an Actuator be?Here is where most people get slightly mis-informed. The difference between the open and closed position for an actuator is simply known as the 'stroke length'. For example, if we had a to move a sliding block twelve inches, we would want to make sure that the actuator we chose for the job would have a stroke length of at least twelve inches.
Do I Need a High Speed Actuator?So to re-cap: You know now how much force you need, as well as the type of actuator you'll be using and the stroke length. Finally you are now ready to figure out the speed of the actuator. Most of the product lines found on our site feature several different forces, this is important because within those product lines, as you increase in force, you decrease in speed due to varying gear ratios, much like the transmission in a car. So by now you've narrowed your selection down to one or maybe two product lines that we carry. At this point, it is a good idea to go to the 'Specifications' tab of each unit and have a look at their speed rating. Keep in mind, speed ratings are assuming the unit is being used at full load.
You're now equipped with the thought process that the pro's in large scale engineering projects follow on a daily basis. If you have further questions or concerns, you will find a wealth of helpful staff at the ready via email or phone on our contact page.
Watch Videos and Read Articles on Linear Actuators Below
- How to use a linear actuator to control a snow blower
- How to use an Arduino with relays to control a linear actuator
- If a 7-year old can install a linear actuator, then so can you!