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Linear Motion Tips

Covering Linear Motion Systems, Components and Linear Motion Resources

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Ball + leadscrew driven

Motion Trends: Ball screws pack more load capacity

March 22, 2019 By Miles Budimir Leave a Comment

ball screws

Continued developments in manufacturing and materials have improved ball screw performance, with the most recent generation of ball screws having greater load densities than ever before, leading to higher load capacities. High-load ball screws are being integrated into electromechanical linear actuator systems for use in applications with higher loads and more demanding environmental conditions. In […]

Filed Under: Ball + leadscrew driven, Linear actuators (all) Tagged With: Ball Screw, Bosch Rexroth, thomson

Application example: Ladders on construction machinery use actuators for better ergonomics

March 1, 2019 By Lisa Eitel Leave a Comment

90% of small U.S. construction companies have safety programs, but only a third have programs to improve the ergonomics of workers’ environments. It’s too bad, because the risk of musculoskeletal disorders (MSDs) is especially high in construction workers. Plus annual wage and salary losses are estimated at $46 million for the U.S. private-construction sector. Workers […]

Filed Under: Applications, Ball + leadscrew driven, Featured, Integrated Linear Systems, Linear actuators (all), Linear drives (all) Tagged With: linak

Electric actuators displace other motion options — including manual designs: A Motion Trends report

March 1, 2019 By Lisa Eitel Leave a Comment

Today, electric actuators are easier than ever to specify and install. Value-add services from component suppliers as well as application-specific actuator product lines (especially for battery-powered designs in mobile equipment and consumer use) eliminate many integration tasks for OEMs and end users. These are trends supported in part by a movement Design World has tracked […]

Filed Under: Applications, Ball + leadscrew driven, Featured, Integrated Linear Systems, Linear actuators (all), Linear motors, Mini + piezo + voice coil Tagged With: linmot, pbclinear

Beam deflection equations for linear systems

August 23, 2018 By Danielle Collins 1 Comment

beam deflection equations

When a linear guide, such as a round shaft or profiled rail, deflects or sags, the bearings that travel along the guide experience edge loading (a higher load concentrated at the ends of the bearing), which can cause rough, irregular movement, increased wear, and reduced bearing life. And when a linear guide is incorporated into […]

Filed Under: Applications, Ball + leadscrew driven, Ball + roller guides, Belt + chain driven, FAQs + basics, Featured, Linear bearings, Plastic + composite guides

When should you lubricate a lead screw?

July 10, 2018 By Danielle Collins Leave a Comment

lead screw

It’s expected that a ball screw, with metal-on-metal rolling contact between the balls and the raceways, will require periodic lubrication with either grease or oil. One of the advantages that lead screws have over ball screws is that they can often operate without lubrication — eliminating maintenance and the potential hazards that come with using […]

Filed Under: Applications, Ball + lead + roller screws, Ball + leadscrew driven, FAQs + basics, Featured

When is resolution important for linear systems?

June 26, 2018 By Danielle Collins 1 Comment

resolution

Accuracy and repeatability are standard specifications that describe how a linear motion system behaves along its travel and how closely it reaches the intended position. Resolution, on the other hand, is less often included in performance data for linear motion systems, but it can be equally important as accuracy and repeatability in some applications. In […]

Filed Under: Applications, Ball + leadscrew driven, Controls for linear axes, Encoders + sensors (linear) + I/O, FAQs + basics, Featured, Linear motors

Ball screw preload: What you need to know

May 11, 2018 By Danielle Collins 2 Comments

ball screw preload

When a linear motion application requires high thrust force and rigidity along with good positioning accuracy, a preloaded ball screw assembly is often the best choice. Manufacturers offer ball screw preload amounts ranging from just 1 or 2 percent for applications where backlash would be detrimental, up to 10 percent or greater for applications that […]

Filed Under: Applications, Ball + lead + roller screws, Ball + leadscrew driven, FAQs + basics, Featured, Linear drives (all)

Gallery: Rod style actuator variations and uses

May 4, 2018 By Danielle Collins 1 Comment

Linear actuators can generally be classified as either slider style or rod style. With a slider style actuator, the motion is constrained to the limits of the housing length and the load is mounted to a slider or table. With a rod style actuator, motion is produced by a rod that extends and retracts from […]

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Filed Under: Ball + leadscrew driven, FAQs + basics, Featured, Linear actuators (all)

Can a linear actuator provide the rigidity and accuracy of a linear stage?

April 17, 2018 By Danielle Collins Leave a Comment

linear actuator

Although there are no industry standards that define linear actuators and linear stages, generally accepted terminology indicates that a linear actuator is typically constructed with an aluminum extrusion or base, while a linear stage is typically built on a flat, machined steel or granite base. This distinction implies that linear actuators can provide longer strokes […]

Filed Under: Ball + leadscrew driven, FAQs + basics, Featured, Stages + gantries

Tolomatic electric actuators with longer strokes (to replace fluid-power cylinders)

April 10, 2018 By Lisa Eitel Leave a Comment

Tolomatic high force electric rod-style actuators now feature stroke lengths to 1.5 m (60 in.) for more flexibility for converting motion control applications with hydraulic or pneumatic cylinders to electric linear motion. Designed for high duty-cycle performance in demanding applications, the RSX, RSA and ERD electric rod-style product families use planetary roller screws for longer […]

Filed Under: Applications, Ball + leadscrew driven, Featured, Linear actuators (all) Tagged With: tolomatic

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