Robot to the rescue

Author Alan Richter
Published
September 12,2022 - 11:00am

Even as North American manufacturers and other companies continue to buy robots at record rates, hundreds of thousands of companies that are suitable candidates for automation have yet to install even a single robot, said Jeff Burnstein, president of Association for Advancing Automation, also known as A3.

The Ann Arbor, Michigan-based organization reports that North American companies set a single-quarter record with the purchase of 11,595 robots worth a total of $646 million during the first quarter of 2022. Compared with the same period last year, sales to the metals industry, which covers any type of metalworking activity, increased 40%.

Automotive customers no longer account for the majority of robotic applications. “Traditionally, small and medium-sized companies, who are the backbone of American manufacturing, associated robotics with something that was for big companies, especially automotive companies, because they were perceived to be very costly and difficult to use,” Burnstein said. “The big shift in our numbers has been that the general industry portion has become larger than the automotive-related portion. The first time we saw it was in 2020, and it accelerated in 2021.”

He said the reasons for the shift are lower costs and that robotics has become increasingly easier to use.

However, a shortage of workers is preventing some small and medium-size part manufacturers from investing in automation because they struggle to hire people who can quickly understand and implement the needed automation equipment, Burnstein said. That said, there’s a double-edged sword at play because those companies also cannot attract and retain workers to do the dull, dirty and dangerous tasks that are well suited for robots. “Some companies have no choice. If they can’t find people, they have to turn to automation.”

Robotic Integration

An option for a manufacturer that is unable to introduce automation using internal resources is to hire an integrator, such as Automation Solutions LLC in Germantown, Wisconsin. According to Automation Solutions, it is a “boutique” company that optimizes manufacturing productivity through custom-engineered system control and robotic integration.

Automate Show 2022
An attendee at Automate Show 2022 examines an ABB collaborative robot. Image courtesy of Association for Advancing Automation

“We are customizing an automation project tailored to the individual needs of the customer,” said President Steve Nordness. “We will go out to the
customer’s facility and look at their idea of what they need to have automated. Maybe they don’t have an idea and just say, ‘This is a mess. What can you help us with?’ We will get into a think tank and start tossing out ideas about what are the options for using robots or simple PLCs (programmable logic controllers) and HMIs (human-machine interfaces).”

Automation Solutions will generally start a conversation about how a customer loads and unloads parts into and out of a machine, Nordness said, noting “that’s something we do really well.” He added, however, that stressful challenges may arise when developing solutions for applications that the integrator has not previously seen. “We are solving new problems all the time.”

Regardless of the automation scenario, one requirement for all customers is a quick return on investment. A lot of Automation Solutions’ projects must deliver ROI in one year, he said. “What we found is that usually projects get funded when the ROI is below three years.”

The payback period can get cloudy when an end user loses focus of the core objective, potentially over automating a process. For example, Automation Solutions reached an agreement in principle for the design, price and projected ROI of one customer’s process, Nordness said, but then the manufacturer started talking about adding conveyors and additional robots to transport parts from shipping containers into the machine.

“It skyrocketed the cost of the solution,” he noted. “There was no ROI for that piece of this process. We just explained to the customer that although it would be a nice thing to do, we want to focus on the things that have the most ROI.”

The company’s solutions frequently leverage collaborative robots, which offer scalability and affordability, he said. There is a cost, for instance, of placing a barrier around a robot that cannot work collaboratively with humans. “If you have to put a fence around a robot and you don’t have the room to do that,” he said, “you have to get more room, and sometimes that’s not possible. Factories can’t put an addition on to house a robot.”

In addition, the process for reprogramming and repurposing a cobot is quick and straightforward. “If you’re running some process and you have the cobot loading that process, and then your business changes and you don’t need that process anymore, you can repurpose that cobot to do something else,” Nordness said. “And we would certainly be willing to help with that.”

High Power and Precision

A cobot, however, is not suitable for all robotic applications. When parts need to be lifted that are heavier than the capacity of a cobot and at a rate faster than a cobot can safely transfer parts, a traditional industrial robot is needed.

The GX series
The GX series
The GX series is Epson America’s flagship line of high-power-density SCARA robots. Images courtesy of Epson America

“It’s not so much that a certain type of robot is better than another one,” Burnstein said. “It just depends.”

One manufacturer of industrial robots is Los Alamitos, California-based Epson America Inc., which specializes in producing selective compliance assembly robot arm, or SCARA, robots and recently launched its GX4 and GX8 series.

“We have three different tiers of performance for customers as the applications get harder and harder,” said Product Manager Aaron Donlon.

The first tier is the T-B series, which is suitable for most pick-and-place applications, in which the required speeds and level of accuracy are “pretty reasonable” and the work environment is not too harsh, he said. As the performance needs and environment become more extreme, end users can select from the company’s LS-B series, or middle-range offering, with payloads up to 20 kg (44.1 lbs.) and 1 m (3.3') of reach.

“The top of the line is currently our G series,” Donlon said, noting that those robots were introduced 10 years ago. “The performance at that time was mind-blowing, and it really changed the market. That being said, as we entered into a new decade, the performance is getting even more extreme as the operations are getting more important and the environments are getting more challenging.”

For the GX series, he said Epson switched from a 400-W to a 750-W motor for joint 1 on the GX8, which is the joint at the base of the robot. “So a lot of the speed comes from that one, along with joint 2. They work together to get the tool center into position.” In addition, joint 3 moves the quill up and down, and joint 4 handles rotation.

“But it’s not just the power,” Donlon continued. “If it was power itself, you would have a machine that would be fast but not precise, and we are the precision automation specialist. We utilize what we call Gyroplus technology to handle the power and vibration that comes with it naturally.”

At the core of this technology is an Epson-manufactured quartz crystal internal inertia sensor tied directly to the servoloop that enables knowing the exact amount of vibration on a robot arm and then damping it.

At a job shop environment where coolant is applied and mist is in the air, along with dust and other noncorrosive material, Donlon recommends the version with IP65 protection standards for electrical enclosures. A popular option is the Intelliflex parts feeding system, which uses vision to locate a multitude of different parts. “That helps people with a high-mix, low-volume environment,” he said. “That’s what makes the most sense.”

The human-machine interface can be a critical component of an automation system.
The human-machine interface can be a critical component of an automation system. Image courtesy of 
Automation Solutions

Like cobots, Donlon added, SCARA robots can be repurposed. “That’s the beauty of robotics in general,” he explained. “You can teach it to do something today, and tomorrow your application changes and you teach the robot to do something different. Maybe you change the end-of-arm tooling, but the versatility of robotics has always been a huge selling point.”

He said robots also enable manufacturers to improve part quality and therefore their competitiveness and profit. “Now you are not spending all your time running around in circles,” he said, “handling QA and angry customers.”

Then there’s a robot’s ability to load and unload machine tools while allowing skilled workers to perform more mentally demanding tasks, such as quoting jobs and programming toolpaths. “That’s one solution to the labor shortage that you’re seeing in machine shops,” he said.

Get Ready

For those hundreds of thousands without any automation that might be considering or installing their first robot, Donlon said it’s important to understand the environment where the robot will be functioning and the level of technology with which workers are comfortable. “They can dial it up or down,” he said, “depending on what they are familiar and comfortable with from a programming and control standpoint.”

It is also critical to not bite off more than you can chew. “One of the keys to getting started is to pick an application that you can be successful at,” Burnstein said, “because that oftentimes gives you the confidence to increase your automation once you have some positive experience with it.”

While it has been quite some time since the first industrial robot was installed in 1961, interest in automation continues to gain steam, he said. For example, he noted that A3’s Automate trade show, which was held June 6-9 in Detroit, attracted more than 20,000 attendees. “There is a thirst for information about how to successfully automate,” he said. 


For more information from Epson America and Automation Solutions about robots, view video presentations at https://qr.ctemag.com/1an02 and https://qr.ctemag.com/1an04

Related Glossary Terms

  • arbor

    arbor

    Shaft used for rotary support in machining applications. In grinding, the spindle for mounting the wheel; in milling and other cutting operations, the shaft for mounting the cutter.

  • coolant

    coolant

    Fluid that reduces temperature buildup at the tool/workpiece interface during machining. Normally takes the form of a liquid such as soluble or chemical mixtures (semisynthetic, synthetic) but can be pressurized air or other gas. Because of water’s ability to absorb great quantities of heat, it is widely used as a coolant and vehicle for various cutting compounds, with the water-to-compound ratio varying with the machining task. See cutting fluid; semisynthetic cutting fluid; soluble-oil cutting fluid; synthetic cutting fluid.

  • industrial robot

    industrial robot

    Robot designed for industrial use. Primarily used as a material-handling device but also used for changing tools, assembling parts, and manipulating special tools and measuring devices. Depending on design, an industrial robot can be programmed to perform a task by means of a controller, or it can be “walked” through the required movements by utilizing a digitizing system that translates movements into commands that the robot can be “taught.” See robot; teaching pendant.

  • metalworking

    metalworking

    Any manufacturing process in which metal is processed or machined such that the workpiece is given a new shape. Broadly defined, the term includes processes such as design and layout, heat-treating, material handling and inspection.

  • robotics

    robotics

    Discipline involving self-actuating and self-operating devices. Robots frequently imitate human capabilities, including the ability to manipulate physical objects while evaluating and reacting appropriately to various stimuli. See industrial robot; robot.

  • sawing machine ( saw)

    sawing machine ( saw)

    Machine designed to use a serrated-tooth blade to cut metal or other material. Comes in a wide variety of styles but takes one of four basic forms: hacksaw (a simple, rugged machine that uses a reciprocating motion to part metal or other material); cold or circular saw (powers a circular blade that cuts structural materials); bandsaw (runs an endless band; the two basic types are cutoff and contour band machines, which cut intricate contours and shapes); and abrasive cutoff saw (similar in appearance to the cold saw, but uses an abrasive disc that rotates at high speeds rather than a blade with serrated teeth).

Author

Editor-at-large

Alan holds a bachelor’s degree in journalism from Southern Illinois University Carbondale. Including his 20 years at CTE, Alan has more than 30 years of trade journalism experience.

Contributors

Association for Advancing Automation
734-994-6088
www.automate.org

Automation Solutions LLC
262-293-9134
www.automationsolutionsllc.com

Epson America Inc.
562-981-3840
www.epson.com