Ultra Motion is linear actuator specialists provide linear motion systems and linear servos for precision motion control. Contact us today! For 20 years, Ultra Motion has been supplying high performance actuators to research facilities
There are numerous variants of linear actuators’ configurations to ensure suitability with different environments and industries. The basic differentiation among the different types of configurations depends on the drive mechanism, while they are further differentiated by the housing type of the manufacturers.
The linear actuators that are mostly used include:
- Belt-driven and screw-driven actuators
These are electromechanical and the most common actuator types; however; it might not make much sense to many people to put these two together under the same umbrella because of their unique technology types. Linear actuator manufacturers deal in both of these common types.
The guide mechanisms used by the belt driven type are numerous. They are famous for their efficiency in speed and strokes and thus they are used with either aluminum extrusion housing or are set in open without any protective housing.
On the other hand, screw driven categories come in further two sub-categories that include lead and ball screw driven actuators. The thrust force of a ball screw actuator is better than the lead screw one. Generally, for the screw driven type, the profiled rail is the most preferred option used as the guide system. Nevertheless, sometimes plain bearings are also used specifically for the lead screw type.
As far as accuracy is required, the most suitable option remains the ball screw type as it is commonly housed in machined steel.
- Pneumatically driven actuators
These are not the electromechanical types, but they are important for automated equipment and have further two categories, namely rod and slider types. The rod type functions in a way that it produces the motion while it gets extended and retracted from housing. In this type, the load is usually at the end and also the rod is used for load pushing. On the other hand, the motion in the slider type remains within the housing limits.
The guide system for the slider type is either plain bearing or recalculating. On the contrary, the guide system for rod type is plain bearings and they don’t have much impact on the load carrying function.
- Rack and pinion driven actuators
The most perfect choice for the purpose of using the actuator for a long period of time as well as for strength against contamination is rack and pinion. Due to this, its usage becomes limited because of the difficulty in finding an appropriate guide system. In case of its required functionality against contamination, metal wheels are used; otherwise joined rails are preferred.
- Linear Motor Driven Actuators
If longer period of travelling is your concern, you can use a linear motor driven actuator. However, the best usage for this kind is for the purpose of high-precision and great motion. The guiding system used by this kind of actuator is either profiled rails or air bearings and even crossed roller guides.
For its housing, a machined aluminum plate can be used. On the contrary, if you prefer highest precision in travel specs, you should use it with a machines steel plate for housing.