In a situation where side loading cannot be avoided, we suggest to customers to use linear slide rails or drawer slides in their system. The slide rail can handle much more side loading than the actuator. By reducing side load the linear actuator can perform its maximum pushing and pulling force. Sideloading, or radial loading, is a force applied perpendicular to the linear actuator centerline. Eccentric loading is any force whose center of gravity does not act through the longitudinal axis of the actuator.
Both sideloading and eccentric loading should always be avoided as they can cause binding and shorten the life of the linear actuator. However, if you use a drawer slide in the application this will greatly impact how much loading can be applied. By placing the object you are moving on a drawer slide it allows the weight to be carried by the slide instead of the actuator taking all the weight.
Another option when you are dealing with side loading is to use a track actuator. Most linear actuators come with limit switches built into them. The type of limit switches available varies with each product range. These include electro-mechanical, magnetic proximity and rotary cam.
Limit switches are normally pre-set on actuators to stop the actuator stroke when it gets to its full extension and full retraction. The purpose of using Limit switches in Linear Actuators are to prevent the Actuator from stalling once it gets to the end of its mechanical limit. If the Actuator stalls, the motors still try to keep going that will eventually result in the Motor burning out.
This is why Actuators typically have built in Limit switches, to switch off the electrical power to the motor once it gets to the end of stroke. Reversing polarity then allows the actuator to change direction. Limit switches are important because they prevent the actuator from burning and stalling the motor when it reaches the end of the stroke. The limit switch simply cuts power to the motor. External limit switches allow you the flexibility to set the limits of travel in your system to fit your particular application.
The customer is responsible for properly setting the limit switch in the unit. If the limit switches are not set or are improperly set, the unit may be damaged during operation. Linear actuators are available with AC or DC motor variants. However, each range has preferred standard types. DC motors are the most popular and are typically 12 volt. This video below is a quick introduction to all the main features on our Premium Linear Actuators.
Linear actuators are available in a variety of linear speeds and a standard list is detailed with each product. To achieve differing speeds the gearing on the actuator will change. Please note, when gears are changed to affect speed, force will be changed as well. Now that you know how much force you need, and an idea of what type of actuator you require, we can move on to the next step of determining what stroke length you'll be wanting.
Here is where most people get slightly miss-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. 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. 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! We precision engineer and manufacture our products so you get direct manufacturers pricing. When the lead screw rotates the lead nut that mates with the lead screw translates along the screw and so converts rotary motion to linear motion.
When compared to Screw Jacks the Electric Linear Actuators offer a pre-packaged actuator with full lead screw protection fully enclosed inside ram , integrated electric motor, integrated mounting options and control feedback devices. The Electric Linear Actuators are suitable for low to high duty applications in most industry sectors and offer a better solution than hydraulic and pneumatic actuators in most cases. The attractive and repelling forces between the coils in the primary part and the magnets in the secondary part cause the primary to move and generate a linear force.
The rate of change of the current controls the velocity of the movement, and the amperage of the current determines the force generated. Tecnotion Corporate video. Top 5 Advantages of Robotic Welding.
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