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Drive gearboxes for mobile robots

Different automated guided vehicles (AGVs) and autonomous mobile robots (AMRs) can require different types of wheel drives. GAM has all your needs covered from standard GML inline planetary gearboxes to integrated strain wave (harmonic) robotic gearboxes to modified and fully custom solutions. Check out all the offerings.
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Universal Robots unveils cobot AI Accelerator

Universal Robots' new UR AI Accelerator is a ready-to-use hardware and software toolkit created to further enable the development of AI-powered cobot applications. Designed for commercial and research applications, the UR AI Accelerator provides developers with an extensible platform to build applications, accelerate research, and reduce time to market of AI products -- ready to use straight out of the box.
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Z-Tip-Tilt nanopositioning stage: High-speed ultra precision

PI offers an ultra-low-profile Z-Tip-Tilt stage designed for demanding alignment applications in optics, semicon-ductors, precision assembly, and photonics. Based on air bearings and linear motors, the stage is wear-free, maintenance-free, and cleanroom compatible. High speed is ensured by 3-phase linear motors, while high resolution and precision are provided by closed-loop operation with linear encoders with 1-nm resolution. Comes in 5- and 6-axis combinations.
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Curtiss-Wright unveils new Exlar GTF food-grade actuator

Curtiss-Wright's Actuation Division has expanded its popular Exlar electric actuator product offerings to include hygienic actuators with FDA-approved materials and finishes. Designed for automation systems in the food and beverage, packaging, and pharmaceutical industries, the GTF with inverted roller screw technology helps customers achieve hygienic certifications more economically. Ideal for builders of hygienic machinery to easily incorporate into their designs.
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Robot has longest reach in Mitsubishi's low-cost series

The MELFA RV-12CRL vertically articulated robot has the longest reach of any robot in Mitsubishi Electric's low-cost robot series: 1,504 mm (59.2 in.). With a 12-kg (26.4-lb) payload capacity, this unit is an ideal candidate for machine tending, case packing, and pick-and-place applications. Built-in features provide enhanced safety, streamlined implementation, and an overall reduction in downtime. Features internal cables and air hoses for end-of-arm tooling.
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Servomotors for food, beverage, pharma, more

Siemens' new stainless steel SIMOTICS S-1FS2 line of servomotors has been designed for the clean condition requirements of the food, beverage, sterile packaging, pharma, and other process industries. These motors are highly resistant to corrosion and acidic chemicals and are offered in a variety of power ratings, from 0.45 to 2 kW (0.60 to 2.68 hp) with torque from 3.1 to 14 Nm (2.28 to 10.32 ft-lb). Features include high dynamics due to low inherent inertia, high overload capacity for pick-and-place, and precise movement of heavy loads. Easy installation and cleaning. Compatible with the SINAMICS S210 drive system.
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What is Sensorless Closed Loop? Precise motor control without an encoder

Matt Sherman, eMobility Sales and Application Engineer at KEB America, runs through different options to drive an AC motor, including one called "Sensorless Closed Loop" that does not require additional hardware such as encoder, resolver, or cables on the motor.
Read this informative KEB America blog.

All about magnetic rotary encoder

The precision and reliability offered by modern rotary encoders are essential in many product categories. These include robotics, machine tools, printing presses, motion control systems, medical equipment, aerospace, gaming and entertainment, and automotive. Learn all about magnetic rotary encoders -- and important developments in the technology's future.
Read the full Avnet article.

High-force actuator line expanded with new models

Tolomatic has introduced five new products in its RSX line of high-force actuators to meet a wider range of industrial applications. These five sizes expand the RSX's capabilities to include forces up to 66,000 lbf (294 kN). RSX actuators, which feature high-precision planetary roller or ball screws for longer life in harsh environments, enable the easy replacement of traditional hydraulics to eliminate leaks and improve system performance.
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What's a motion-amplified piezoelectric actuator -- and what can it do for you?

Piezoelectric motion components are highly valued for their fast response times, capable of dynamic movements at frequencies reaching several kHz, and delivering motion resolution down to the sub-nanometer level. Learn why amplified piezo actuators have the edge over traditional piezo stack actuators.
Read the full article.

How to maximize and optimize stepper motor control

Engineers from Performance Motion Devices take a comprehensive look at how to control two-phase stepper motors, beginning with the basics (operations, strengths and weaknesses) and moving on to traditional and updated advanced techniques for control including closed loop. A very thorough presentation.
Read this informative Performance Motion Devices article.

Ergoswiss table lifting systems from AutomationDirect

Automation-Direct has added the new SQ series table lifting systems from Ergoswiss. These lifting systems use electrically driven columns that allow the operator to reposition the height of a worktable, conveyor, etc. to meet specific requirements. In doing so, the operator can perform their tasks in a more comfortable working posture, helping to reduce work-related injuries. These systems are all electric (no hydraulic mess or manual hand cranks), and each lifting column features a housed motor and screw drive to perform the needed height adjustments.
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Compact linear voice coil servo motor with built-in shaft and bearing

The GVCM-032-025-02M Linear Voice Coil Servo Motor is the first of a new series of non-commutated, brushless linear servo motors from Moticont. This clean and quiet unit has a 12.7-mm stroke with built-in shaft and bearing, a continuous high-force-to-size ratio of 9.3 N (2.1 lb), and 29.3 N (6.6 lb) of peak force at a 10% duty cycle. Features include: high reliability, high speed, zero cogging, high acceleration/deceleration, and, when used in a servo loop, very high accuracy and repeatability. An ideal choice for: haptic feedback, medical devices, laser machining and drilling, work holding and clamping, scanners, optical focusing, testing, sorting, and assembly.
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Optical rotary encoders: Close the stepper motor linear actuator feedback loop

With the help of a motion controller and a stepper driver, all stepper motor linear actuators can be programmed to position a load to a precise location. However, standard configurations do not provide a feedback mechanism that tells the operator whether the move is completed or not. Adding an encoder can be an effective and simple solution to get real-time motion feedback about your application.
Read this informative Thomson article.

Overhead conveyor drives for automotive, food processing

Overhead conveyor drives from NORD DRIVE-SYSTEMS are engineered with long-lasting performance and durability in mind. They feature high-quality components, heavy-duty construction, and an output mounting flange and shaft for easy drop-in replacement of industry-standard footprints. They are an ideal solution for meat and poultry processing, automotive assembly, and other manufacturing systems where utilization of vertical space is required. Lots of options and many more features.
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Oops: New heavy-truck efficiency standards could spur more energy use -- not less

Deliveries are getting faster than ever in the United States, but the quicker movement of goods is undercutting the country's climate progress.

In a new study published July 18 in the journal Nature Energy, a University of Colorado at Boulder (CU Boulder) researcher and his collaborator estimate that federal regulations aimed at enhancing heavy-duty trucks' energy efficiency could be as much as 20% less effective than policymakers initially anticipated.

That's because the regulations make trucking cheaper. As a result, more shippers will likely switch from using less energy-intensive rail transportation to using more energy-intensive trucks to ship goods.

"We were surprised to see how big of an impact the change in shipping decisions has on our energy use," said Jonathan Hughes, the paper's corresponding author and professor in the Department of Economics at CU Boulder. "Increasing vehicles' energy efficiency is very costly for truck makers, so it's important to know how much benefit we can get realistically from these costly regulations."

The rebound effect
In economics, increased consumption due to improved efficiency and reduced costs is known as the rebound effect.

For example, if using an air conditioner consumes much more electricity than using a fan, many people will stick to the fan. However, when air conditioners become more efficient and cooling becomes cheaper, more people will switch to air conditioners. This behavior change would increase overall energy consumption.

Hughes and his collaborators wanted to study the extent of the rebound effect in the freight sector.

"When we think about the challenges in energy and climate change issues, freight transportation is a big, important sector that hasn't received enough attention," Hughes said.

The freight sector, which includes transportation of goods by truck, train, ship, and airplane, represents approximately 10% of total U.S. energy consumption. Freight movement contributes to 27% of the country's greenhouse gas (GHG) emissions from the transportation sector, which is the largest source of emissions in the United States.

The majority of emissions from the freight sector come from trucking, which saw a 76% increase in GHG emissions since 1990.

In a bid to reduce emissions and avoid the worse consequences of climate change, the U.S. Environmental Protection Agency (EPA) has rolled out a series of regulations to improve heavy-duty vehicles' energy efficiency since 2011. These rules require newly manufactured trucks to achieve better mileage using less fuel and emit less GHG.

In March, the EPA announced the strictest-ever fuel economy standards, aiming to prevent 1 billion metric tons of GHG emissions by 2055.

However, while these regulations make trucks more energy efficient, they also make trucking cheaper by reducing fuel costs. As a result, many shippers may opt to transport their goods by truck instead of rail, because trucks can reach destinations faster, allowing for quicker product sales. The authors note that trucks consume significantly more fuel than rail to transport the same amount of goods over the same distance.

Unintended consequence
Hughes and his collaborator, James Bushnell of University of California at Davis, used newly released data on goods movement from the U.S. Census Bureau to estimate the rebound effect in the freight sector. Using a computer simulation, they calculated the amount of energy saved if the EPA regulations increased new trucks' fuel efficiency by 5%, which is roughly what the standard is today.

Under this scenario, the team found the regulations had the potential to save 674 million gallons of gas per year. However, when they factored in the increased share of goods forecasted to be shipped by truck due to the rebound effect, the regulations would only save 497 million gallons of fuel -- still a significant amount, but 26% less than previously estimated.

Some industries, such as the chemical, animal feed, alcohol, and petroleum industries, are particularly sensitive to reductions in fuel costs and would likely experience the largest rebound effect, Hughes said.

Accounting for all modes of freight transportation, the team estimated the rebound effect in the freight sector would reduce the total fuel savings from federal regulations by 20%.

"We show that if we make transportation much more efficient, either through increasing energy efficiency or automation that reduces labor costs, we will likely wind up consuming more energy than we thought we would," said Hughes.

While the paper focused on the freight sector, Hughes added a similar rebound effect could also exist in the retail sector, which includes businesses like Amazon.

"These regulations that help reduce transportation costs certainly benefit consumers, because we can now purchase things at lower prices. But we show that these rules can be somewhat counterproductive in terms of achieving our climate change and energy goals," Hughes said.

Hughes said making fuel pricier and transportation more expensive through programs like taxing carbon emissions would be a more effective way to reduce energy use in transportation. Those types of policies, however, tend to be very difficult to garner political support, he added.

"This study shows we should get a more complete picture of the impacts these regulations might have, so we don't end up adopting policies that lead to unintended negative effects," he said.

Source: University of Colorado at Boulder

Published July 2024

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