Ask an EngineerWhat Are Servo Linear Actuators and How Do They Work?
A servo linear actuator converts rotary motion from a servo motor into linear movement through an internal screw mechanism. In an integrated design, the motor is built directly into the actuator housing rather than mounted externally. This eliminates couplings, belts and other alignment steps required with traditional actuator and motor assemblies.
Because the motor and actuator are engineered together, the result is a more compact motion solution that’s easier to install and maintain while delivering the dynamic response and accuracy associated with servo control.
This video illustrates how this integrated architecture works and why it can offer advantages over separately mounted motor systems.
To explore available configurations and performance ranges, see Tolomatic’s full servo linear actuator product series.
Electric actuator technology comparison: Integrated and Traditional Designs
This whitepaper compares several factors to consider when evaluating integrated and traditional actuators; knowing how to assess the differences and what to compare will help engineers meet their spec requirements.
Servo Linear Actuator Successes
Product Family: Electric
Product Used: GSWA ServoWeld® Actuator
In auto body welding, servo linear actuators are used in applications where controlled, precise precision and force are essential.
Challenge: Precise positioning of product, blowers, sealers, welders, and more.
Product Family: Electric
Product Used: IMA Integrated Motor Actuator
For injection molding and aseptic plastic equipment, servo linear actuators addressed the repeatability and accuracy needed for consistent part quality.
Application Description
Filling machine that requires frequent container changes and wash-down
Application Challenge
Enable fast, flexible positioning across varying container sizes, performing precise vertical movements
The IMA-S servo linear actuator provided a practical fit with its all-in-one construction to support easier integration in equipment designed for hygienic enviroments.
Application Description
An actuator to steer the wheels of a high-speed train car, to reduce the wear caused by curves in the track.
Product Used: Modified IMA44 Integrated Linear Servo Actuator
Product Type: Modified Standard
Unique application requirements are used to steer the wheels of high-speed train cars, helping to reduce wear caused by track curves. Controlled linear motion allows for precise adjustment during operation in demanding rail applications.
Drive Integration Tools
The Drive Integration Tool helps engineers evalute servo drive compatibility and integration considerations when specifying a servo linear actuator. It is intended to support faster system design and more confident component selection.
Selecting the Right Servo Linear Actuator
Unique application requirements play a significant role in selecting the appropriate servo linear actuator. Tolomatic offers several actuator families designed to address different operating conditions while maintaining the benefits of integrated servo control.
Electric rod actuator integrated with a servo motor in a single, compact design that integrates with 3rd party drives and accessories. Forces up to 8,044 lbf (35.8 kN).
Combines a hygienic electric rod actuator and motor into one package. It is IP69K, built with 316 SST, and works with 3rd party drives and accessories. Forces up to 2,500 lbf (11.1 kN).
Food grade design combines an electric rod actuator and motor into one design with a white epoxy coating for wash-down environments. Integrates with 3rd party drives and accessories. Forces up to 6,900 lbf (30.6kN).
Integrated servo motor/actuator used in robotic resistance spot welding which offers a compact, power dense actuator solution with best-in-class performance. Forces up to 4,050lbf (18kN).
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