Cobots and Beyond
Collaborative robots address a challenge that will continue to be addressed.
Share
Common as robots are in futuristic stories, I know of no story dealing with the challenges real-life robots present. One of these is the challenge of keeping industrial robots from injuring us, either because of their unthinking motions or ours.
In recent years, the commercialization of collaborative robots has made this challenge a topic of interest. Traditionally, the safe use of robots in manufacturing has relied on barriers that keep people and robots separated. Yet that approach is inefficient, consuming floor space for the caged-in area and limiting the work that people and robots can do together. The “cobots” offer a different solution. These robots move without enough speed or force to do harm, and they are force-sensing, stopping in response to any obstruction that might be a person. Are these cobots the way forward for industrial automation?
They are part of the way forward, says John Burg, founder of robotics integrator Acieta. I recently spoke with him at an event focused on collaborative robots at his company’s Iowa headquarters.
An example of an application he has seen in which a cobot makes sense is this: A basket sent into heat treatment gets manually loaded with parts. Various different baskets have warped differently after many heat-treat cycles, so automated loading of the baskets is problematic. However, a robot lifts each basket of parts once it is full. Here, collaborative technology makes it safe and simple for a person and a robot to complete the task together.
But in a different application in which the user was initially focused on a collaborative robot, in this case for part loading, Mr. Burg says the user’s productivity called for a narrow cycle time target for the robot. As it happened, the cobot’s limited speed proved too slow to meet that need.
This points to a challenge with the new technology, he says. Because it is new, and because it offers some manufacturers a promising new way to use robots, many are rushing to cobots in applications where they arguably don’t make sense.
Another speaker at the Acieta event was Claude Dinsmoor, general manager for material handling robotics with FANUC America. His company’s cobots were running in part-loading demonstrations at this event. (I let one hit me to see its responsive stopping.) He, too, says collaborative robots are an important development, but not the final answer to the safety challenge. Indeed, he tells a futuristic story of his own.
One solution already in use today, he notes, is the “fenceless” robot. Sensors used in conjunction with a robot at full speed and power can enable it to slow if a person comes near and stop if a person comes very close. How much further could this idea go?
Maybe the day will come when something like a collaborative robot is not collaborative all the time, but instead has limitations that reliably activate when people are in proximity. In the future, he says, perhaps it will be advances in the sensitivity, specificity and responsiveness of sensors that will allow fast, forceful robots to unguardedly operate within the same production space where people also work.
Related Content
CNC Machine Shop Honored for Automation, Machine Monitoring
From cobots to machine monitoring, this Top Shop honoree shows that machining technology is about more than the machine tool.
Read MorePartial Automation Inspires Full Cobot Overhaul
Targeting two-to-four hours of nightly automation enables high-mix manufacturer Wagner Machine to radically boost its productivity past a single shift.
Read More3 Ways Artificial Intelligence Will Revolutionize Machine Shops
AI will become a tool to increase productivity in the same way that robotics has.
Read More4 Steps to a Cobot Culture: How Thyssenkrupp Bilstein Has Answered Staffing Shortages With Economical Automation
Safe, economical automation using collaborative robots can transform a manufacturing facility and overcome staffing shortfalls, but it takes additional investment and a systemized approach to automation in order to realize this change.
Read MoreRead Next
Inside Machineosaurus: Unique Job Shop with Dinosaur-Named CNC Machines, Four-Day Workweek & High-Precision Machining
Take a tour of Machineosaurus, a Massachusetts machine shop where every CNC machine is named after a dinosaur!
Read MoreThe Future of High Feed Milling in Modern Manufacturing
Achieve higher metal removal rates and enhanced predictability with ISCAR’s advanced high-feed milling tools — optimized for today’s competitive global market.
Read MoreIMTS 2024: Trends & Takeaways From the Modern Machine Shop Editorial Team
The Modern Machine Shop editorial team highlights their takeaways from IMTS 2024 in a video recap.
Read More