Bosch Rexroth launches new microsite for resource kits

In an effort to make life even easier for time-challenged engineers, Bosch Rexroth has launched a microsite (http://www.movewithrexroth.com/) for its latest factory automation products and the associated Resource Kits. This website features easy navigation through ten of Rexroth’s newest products in the areas of Electric Drives and Controls, Linear Motion and Mechatronics, Plastic Chain Conveyors, […]

Linear Motion Tips

How to choose linear guide accuracy

When choosing a recirculating linear guide, there are several criteria that need to be specified, including size, preload and accuracy. And although the term “accuracy” is often used in a generic sense, when referring to recirculating ball or roller guides, it designates five characteristics: Height tolerance of the rail and block assembly Permissible difference in height between […]

Linear Motion Tips

Onboard electronics make linear actuators safer and smarter

By Chad Carlberg | Product-line manager for linear actuators, Thomson Linear • Today’s electromechanical actuators deliver performance that’s comparable or even superior to other technologies in outdoor applications. They’re often cleaner with lower cost of ownership than predecessors. Traditional electric actuators provide basic machine functionality (to push and pull loads on command via switches) but more […]

Linear Motion Tips

New multi-axis positioning family from PI

High-end industrial and research applications rely on precision motion stages and systems to execute mission-critical procedures and processes. PI, a leading provider of nanopositioning and motion control solutions, has developed its new family of linear, rotary, and Z-axis stages to meet those demanding requirements. Meet the L-310 vertical stage, the L-611 rotary stage, and the […]

Linear Motion Tips

FoodStream Pillow and Flange Blocks: FDA/USDA and 3A-Dairy Compliant

FoodStream electroless nickel plated pillow and flange blocks from LM76 are FDA/USDA/3A-Dairy compliant linear motion components. They complement LM76’s line of FDA compliant bearings, scraper seals, and shafting. FoodStream off-the-shelf pillow and flange blocks are ideal for use in processing and packaging food, producing pharmaceuticals, the BioPharma industry, and in medical devices. Inch size FoodStream […]

Linear Motion Tips

How to choose linear guide preload

When choosing a recirculating linear guide, one of the key criteria in the specification is preload. Linear guide preload eliminates the clearance between the bearing block and the rail, which increases rigidity and reduces deflection when external loads are applied. To achieve preload, manufacturers use balls (or rollers, in the case of roller bearings) whose diameter is […]

Linear Motion Tips

Compact linear piezo stages offer nanometer resolution and extended travel ranges

Engineers and scientists working in the fields of nano-biotechnology, metrology, and photonics run applications that require nanometer precision and ultra-fine adjustment, often in confined spaces. To meet those requirements, PI, a lead manufacturer of nanopositioning and motion control solutions, provides its compact linear piezo positioners – P-620.1 to P-629.1 – of the PIHera family consisting […]

Linear Motion Tips

FAQ: What is stick-slip?

Stick-slip, also referred to as “stiction,” is the bane of engineers and machine builders who need smooth, precise motion. Simply put, it’s the jerkiness that can plague both plain and recirculating linear bearings when they transition from standstill to motion. Here’s why stick-slip happens… When two objects slide against each other, friction works against their motion. […]

Linear Motion Tips

How linear force-current relationships from linear motors improve motion

Applying an electric motor is easier when one knows what it will output for a given input. The simpler it is to predict that, the more elegant and robust the design. To this end, some linear motors have linear force-current relationships so engineers don’t need to accommodate nonlinear effects through approximation or additional terms in […]

Linear Motion Tips

Tolomatic adds extreme-force capability to electric linear rod actuator offering

Tolomatic’s new RSX hydraulic-class electric linear rod actuator meets the need for extreme forces and is a good choice for replacing hydraulic cylinders. Designed and tested for 100% duty cycle, the actuator’s roller-screw drive ensures long, consistent life. Applications include pressing, punching, stamping; riveting, fastening, joining; injection molding; and sawmilling. The Tolomatic RSX family of […]

Linear Motion Tips

Airpot introduces 5.6 mm bore anti-stiction cylinder

Airpot Corp. now sellsMP5 Airpel Plus — the newest, smallest bore cylinder in its Airpel family of Anti-Stiction air cylinders. With a bore size of only 5.6 mm and a maximum outside diameter of 9.8 mm, MP5 is for low-force pneumatic actuation requiring the most sensitive pressure response and precise, accurate, gram-level force control. MP5 Airpel is […]

Linear Motion Tips

The good old days…they were terrible!

That was the mantra of my Technology and Society professor in college. And in many cases, I have to agree with him. While we like to romanticize the “good old days,” when things were simpler and more straightforward, how many of us would really want to go back and work in the era of slide rules […]

Linear Motion Tips

New anti-rotational design ensures voice-coil actuator accuracy

BEI Kimco, a brand of Sensata Technologies, now sells a new moving magnet Voice Coil Actuator with a flexure design that ensures high alignment accuracy by preventing unwanted shaft rotation. The new VCA also provides long life with cost-effective pricing and is ideally suited where extreme precision is required, such as in medical equipment, laboratory […]

Linear Motion Tips

PTDA’s 2Q2016 Sales History & Outlook Report predicts slower sales growth through 2016

The second quarter Sales History & Outlook Report (SHOR) released by the Power Transmission Distributors Association (PTDA) shows power transmission/motion control (PT/MC) distributor sales have declined 6.1 percent from one year ago. Leading indicators suggest the weakness in sales will abate by the end of 2016 and business activity will improve in 2017. PTDA members […]

Linear Motion Tips

2016 Neuroscience Conference Debuts PI’s Ultra-Stable Microscope XY Stage Packages

Physik Instrumente will introduce two new compact XY microscope stages based on ultrasonic piezo direct-drive motors. Model U-761 provides 25x25mm travel and is equipped with 10nm resolution linear encoders, model U-780 provides 135 x 85 mm. More after the jump. Ultra-Stable – Suitable for Imaging PI’s patented ultrasonic direct-drive motors feature millisecond responsiveness and provide a […]

Linear Motion Tips

FAQ: What are some alternative ways to get DOFs from XY gantries?

Repeatability and accuracy are core to all motion systems — especially XY gantries. On gantries, controls make axes run through predefined trajectories. Traditional XY gantry setups include an upper Y-axis gantry member sitting on twin X1 and X2 support axes. The latter axes include motor, screw, and bearing separated by a finite distance orthogonal to stroke. […]

Linear Motion Tips

Linear actuators from Delta Products simplify OEM design work

Delta now offers LU-Series linear ballscrew actuators for OEM design-in. The linear actuators from Delta Products improve machine automation cost efficiencies & cycle times.  The design is a compact actuator comes fully assembled in a patented coupling-less mounting configuration to reduce torsional backlash and shorten installation footprint. More after the jump. The highly rigid design reduces […]

Linear Motion Tips

Flange bushings eliminates bulky housings (and deliver smooth linear motion)

NB’s Flange Linear Ball Bushing line offers the best of both worlds … the benefits of a slide bush with the mounting ease of a flange. When an application calls for ease of assembly, select a completely integrated system. Choose from single, doublewide, or center mount configurations. Flange types are available in inch, Asian or European […]

Linear Motion Tips

Curtiss-Wright Sensors & Controls launches new Exlar brand FTX Series actuators

Curtiss-Wright Sensors & Controls Division today announced the release of the second frame size of its next-generation Exlar brand FTX Series actuators. These high-force electric rod style actuators now offer higher performance and ease of maintenance than previously available. More after the jump. The FTX Series actuators leverage more than a decade of experience successfully […]

Linear Motion Tips

Intelligrated expands sortation portfolio (with vertical conveyors, tote stacking and more)

Today’s automated operations require flexibility and simplicity to accommodate multiple product and packaging types, fit shrinking layout requirements and scale with growing demand. Intelligrated now offers more from its sortation portfolio with solutions designed for these challenges. USS vertical conveyor and sortation, tote stacking and destacking, buffering and sweeper sorter systems offer simple solutions engineered to fit […]

Linear Motion Tips

Drive nut runs on threaded shaft

Amacoil-Uhing model RS drive nuts provide smooth backlash-free linear motion in machine design. Unlike a screw, the RS drive nut runs on a smooth shaft. This eliminates the potential for debris to become trapped in threads which could then clog or jam. If material does fall onto the shaft, it is easily removed by wiping the […]

Linear Motion Tips

Linear actuators: the make vs. buy decision

With the range of linear actuators on the market, it’s becoming easier for machine builders and end users to find a standard or “customized standard” product that meets even the most unique application requirements. But there are still times when it makes sense, from a financial or technical standpoint, to design and build an actuator […]

Linear Motion Tips

What is a PV rating?

When discussing bearing life, what comes to mind for most engineers is the standard L10 bearing life equation. But this equation was developed for bearings with rolling balls. (A similar equation exists for bearings that use rollers rather than balls.) For plain bearings, which have no rolling elements, determining the suitability of the bearing for a […]

Linear Motion Tips

Guide systems that turn corners

The shortest distance between two points may be a straight line, but some applications dictate moving in curved sections and around corners. When two or more axes are combined, as in a Cartesian or gantry system, a method of control called contouring can be used to create radii and round the corners of traditional rectilinear coordinates. […]

Linear Motion Tips

How to shrink the size of a linear actuator

Linear actuators come in a wide range of sizes, but over the past several yeas, manufacturers have been emphasizing more and more compact footprints. But no matter how small the actuator, the addition of a motor can make the overall size of the complete system too large for space-constrained applications. Some manufacturers are addressing this issue […]

Linear Motion Tips