Determining the life of a linear system that uses balls or rollers is relatively straightforward, thanks to the L10 bearing life equation, which gives life in meters of travel (for linear bearings) or revolutions (for screws). And for plain bearings and lead screws, manufacturers typically use the bearing’s PV value and operating conditions to provide an […]
Screw drives see new uses in robotics, other applications
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 […]
Aerotech launches second generation of nanopositioning stages
Aerotech Inc. has released the second generation of its popular ANT nanopositioning stages. Building on its best-in-class predecessor, this line is engineered to bring superior performance to applications that demand truly outstanding dynamics and nanometer-level precision. “We’ve made the ANT nanopositioning stages even better, giving our customers options with impressive dynamic capabilities, industry-leading positioning performance, […]
Pandemic impacts linear motion component manufacturing, applications
Linear motion components include everything from various types of linear actuators to linear guides, slides and ways, and a host of components in between. One thing they all have in common is that their development and production are influenced by both technological trends as well as broader market forces. One of those forces is has […]
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 […]
Miniature linear guides for mounting in tight spaces
IKO has expanded its LWL family of miniature guides with the addition of its newest LWLF2 linear motion rolling guide, which addresses the demand for device miniaturization with a compact, lightweight design that makes mounting easy in tight spaces. The new LWLF2 features the same ultra-small 2.5-mm height dimension as its predecessor, the LWL1. It’s […]
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 […]
Linear bearing basics: Surface roughness, texture, and finish
One of the factors to consider when selecting shafts for linear bearings is surface roughness, which describes the microscopic asperities, or peaks, and valleys present on a material’s surface. But surface roughness is an important specification for all types of linear guides and screws — whether plain or recirculating, round shaft or profiled rail, ball […]
Five ways to drive ROI from personnel and cobot investments
In this article, we detail how assembly, packaging, and machine-tool OEMs can keep senior plant personnel in charge of the most demanding and intricate tasks — and relegate everything else to pre-programmed work routines and automated workcells. Such approaches make copious use of cobots and augmented reality (AR) tools. By Tim LeCrone • Director of […]
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 […]
What is torque ripple and how does it affect linear motion applications?
Motors produce torque and rotation through the interaction of magnetic fields in the rotor and the stator. In an ideal motor — with mechanical components that are perfectly machined and assembled and electrical fields that build and decay instantaneously — torque output would be perfectly smooth, with no variations. But in the real world, there […]
New LMHB linear ball bushing can press fit into assemblies
THK America Inc. now offers a type LMHB linear bushing for linear-motion applications. This linear bushing is press-fit into moving elements of linear motion axes to allow smooth traversal of round shaft. The THK LMHB linear bushing achieves smooth and silent motion thanks to the spring effect provided by curved metal plates within the assembly […]
What does bandwidth refer to in the context of servo systems?
Most people are familiar with bandwidth as it relates to networking and WiFi service — for example, the 2.4 GHz and 5 GHz frequency bands on which WiFi signals are transmitted. But bandwidth also plays an important role in servo control and tuning. The bandwidth of a servo control system indicates how quickly the system […]
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,” […]
Troubleshooting V-belt wear and failure
Although there are more than a dozen symptoms of premature wear and impending failure for V-belts — ranging from visible damage to audible noise — there are a few key ways that these friction-based belts can fail during operation. To help users determine the root cause of a failure or signs of potential failure, V-belt […]
Linear rails from Rollon simplify design of high-performance automated systems
Rollon has upgraded its Telerace family of linear rails to help designers simplify projects and enhance the efficiency of automated systems. Two Telerace families of cold-drawn steel rails now feature induction hardened and ground raceways along with double-row ball bearings for greater load handling capability, longer life and reduced maintenance requirements. The newly enhanced rail […]
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 […]
What do the belt section designations H, J, K, L, and M mean for ribbed V-belts?
V-belts rely on friction caused by the “wedging” of the belt between pulley flanges — together with internal fiber cords — to transmit power in a wide range of industrial and consumer-goods applications. One variation of the traditional V-belt is the ribbed V-belt — also referred to as a V-ribbed, poly V, or serpentine belt. Ribbed V-belts take […]
Nook Industries sells family business to Altra Industrial Motion Corp.
Nook Industries, a leader in US engineered linear motion products and solutions, announced today that it has sold the family-owned business to Braintree, Massachusetts based Altra Industrial Motion Corp. (Nasdaq: AIMC), a leading global manufacturer and supplier of motion control, power transmission and automation products. The Nook business, which will be integrated into Altra’s Thomson […]
The top 10 linear motion articles of 2021
In our 2020 recap of the most-read linear motion articles, we noted how our readers went “back to basics,” with articles about fundamental engineering topics dominating the list. That theme continued in 2021, but this year, the dominant articles dealt not only with engineering basics, but more specifically with “how to calculate” topics. And although […]
What is a split bridge system and how does it differ from a gantry?
Multi-axis linear systems come in a variety of designs, with Cartesian, gantry, and XY tables being some of the most common types. While these designs simplify construction and can provide space savings, they also introduce “stacking” errors — the compounding of errors from each axis, which manifests at the work piece or tool point. Mounting axes […]
MKS now offers Newport MLT-Z vertical linear stages and pre-assembled MLT-XYZ stacks
MKS Instruments is extending its MLT Series of compact, low profile high precision linear stages with pre-assembled XYZ-stacks and MLT-Z vertical stages. MLT stages are ideal for typical scanning or point-to-point applications in semiconductor, industrial, or research markets for metrology, sensor test and calibration, alignment, and pick-and-place assembly. The MLT series showcases the latest innovations and […]