Some of the surest, time-tested methods of linear actuation are screw drives. Whether lead- or ball- or roller screws, screw actuation remains a large part of the linear actuation equation, thanks to their reliability, accuracy, and relative simplicity of operation. Recently screw drive developments have included advances in materials as well as manufacturing methods leading […]
Linear Actuators Archive
Get the latest product news, technical info, and FAQs about linear actuators.
Comparing micropositioning and nanopositioning stages
Linear stage designs can range from long-stroke, high-load gantries to micropositioning and nanopositioning stages with light payloads. Although all linear stages are designed and constructed to provide high positioning accuracy and repeatability and to minimize angular and planar errors, stages for micropositioning and nanopositioning applications require additional considerations in component selection and design to achieve these […]
Part 2 of 2: Electric actuators as an alternative to hydraulic cylinders
Here we offer some tips for converting a fluid-power-driven axis to electrical actuation. By Ryan Klemetson • Business Development Manager | Tolomatic, Inc. As explained in Part 1 of this article series on motioncontroltips.com, hydraulic systems offer long service life, but they’re not as efficient as electric systems. Electric systems also provide precise position, velocity, […]
Ewellix launches intelligent SmartX platform for linear motion
Ewellix has launched an intelligent digital platform which will underpin a new and advanced generation of linear motion solutions. Called SmartX, the new digital platform has been designed to help engineers develop motion, robotic and automation systems that offer far greater levels of intelligence, connectivity and adaptability than are achievable from existing equipment. As a […]
What is an inverted roller screw and how does it work?
Roller screws are often thought of as the standard planetary design, but several variations exist, including differential, recirculating, and inverted versions. Each design offers unique benefits in performance capabilities — load capacity, torque, and positioning — but the inverted roller screw’s primary strength is its ability to be easily integrated into actuators and other subassemblies. Recall that […]
What are piezo flexure stages and how do they work?
Piezo actuators provide highly responsive, rapid movements, but their displacement is limited to just 0.1 to 0.2 percent of the actuator length. To overcome this limited stroke capability, a piezo actuator can be combined with elements, such as flexures, that provide mechanical amplification. The amplification provided by a flexure mechanism can extend the stroke of […]
What are piezo actuator creep and drift?
Piezo actuators exhibit a linear* relationship between applied voltage and displacement, responding almost instantly to any change in voltage. But they also experience creep — a phenomenon in which the actuator continues to expand or contract even after the voltage change is complete. Piezo actuator creep Creep occurs because piezoelectric materials have an asymmetric charge […]
Screw handedness: When do you need a left-handed screw?
Just like people, ball and lead screws can be either right-handed or left-handed. But in screw terminology, handedness indicates the direction in which the nut moves relative to the direction of the screw’s rotation. By far the most common version is the right-handed screw, in which the nut moves toward you when the screw is […]
Rod-style electric actuator designed to meet hygienic standards
A new RSH electric hygienic rod-style actuator from Tolomatic delivers clean, continuous control to automation machinery. RSH actuators are designed to help improve repeatability, enhance quality, reduce contamination potential and increase flexibility of hygienic machine designs, particularly for the food, beverage, medical, healthcare and pharmaceutical industries. “We designed the RSH for ‘mission critical’ hygienic applications,” […]
When are stepper motors paired with ball screws (rather than lead screws)?
Stepper motors are widely used in industrial and consumer applications ranging from packaging equipment and medical devices to 3D printers and vending machines. They have excellent torque production at (relatively) low speeds — especially for a given motor size — and offer high-resolution positioning in a simple-to-use format. These benefits make them well-suited to drive lead […]