Automating Small Batch Welding

MT Solar Solar design and manufacture solar mounting structures for solar modules and arrays of all sizes

In Short

MT Solar designs and manufactures mounting structures for solar modules of all sizes. A DIY Vectis Cobot Welding Tool powered by a Universal Robots UR10e collaborative robot now handles a wide range of welds, enabling quick change-overs and optimized production. MT Solar overcame labor shortages and freed current staff from repetitive welding tasks while successfully handling a 300% surge in demand.

MT Solar is a solar mounting equipment manufacturer headquartered in the picturesque community of Charlo, Montana. The company experiences a 300% jump in demand for its solar mount products every summer but has been unable to find skilled welding workers to handle the seasonal uptick. MT Solar owner and president Travis Jordan was in his office one day, “just scrambling” to deal with the labor shortage when one of MT Solar's welders handed him an article on welding robots. Jordan recalls: “He said 'I really think you should look into this, it would be a good solution for our team.' And I’m like, 'Well if you got one of the operators saying you need to look into robotics, you’ve got a reason you should be doing something here.'”

The business transformation

At that point, MT Solar’s lead times were two to three times what they were supposed to be. “It’s hard to find good, skilled people that are willing to come up here and work,” explains Jordan. His hiring woes reflect a national trend; the American Welding Society predicts a potential shortfall of 400,000 welders by 2025. MT Solar researched conventional welding robots but found them best suited to huge batches of the same item and lacking in flexibility.

Finding a flexible automation solution was crucial for MT Solar as the company makes many different types of mounting parts, often in high mix/low volume batches. Jordan explains: “Think of us as a 'Solar Ikea,' if you will—where all the pieces have to go out to the customer to be assembled in the field. If I don’t have all the other parts that go with it, I can’t ship anything.”

The cost of conventional automation was compounded by the hassle associated with programming and set up, adds Jordan. “At first it might look like a good idea to use traditional robots, but when you look at the time and resources to get them up and running and programming, it was not the route we wanted to take. Conventional robots aren't very flexible. They can’t handle a mixed bag. The envelope is too small. Or the fixturing can’t be manipulated properly, and the cost would have gone through the roof,” says Jordan, adding that the company preferred a solution that wouldn’t require safety guarding and that existing operators could handle.

Montana Solar
Industry Metal and Machining
Country United States
Number of Employees 5-25
Cobots used UR10e

How they did it

When MT Solar discovered Universal Robots, the paradigm changed. “The big difference is the 'collaborative robot approach' of being able to work with the robot, and it being so teachable and so easy to run,” says Jordan.

While traditional welding robots require safety cages and can look “kind of like a nightmare,” cobots offer safe human-robot collaboration in close proximity without fences, Jordan notes, further increasing the appeal of cobot-powered welding solutions. “When I zoomed in and discovered Vectis Automation’s Cobot Welding Tool powered by Universal Robots, it became obvious that this combination was the right way to go.”

DIY programming complete, the robot autonomously runs a full MIG welding cycle. The UR10e welds six to eight parts in each cycle. Typically, these are small parts, including lock collars, beam clamps, and weld nuts. The cobot welds these in a predefined order and completes 4-12 parts per run with no batching. When it has completed its welding tasks, humans can reload parts and restart the system, if required, or quickly program a new welding job with fresh parts. The cobot is responsible for welding specific lists of parts every 38-minute takt time shift. Operators work collaboratively with the cobot, loading, and unloading during cycles and maximizing the building reach of the machine to cover multiple different fixtures.

The cobot is responsible for welding specific lists of parts every 38-minute takt time shift. Operators work collaboratively with the cobot, loading, and unloading during cycles and maximizing the building reach of the machine to cover multiple different fixtures.

Streamlined welding setup

Operators set up the cell with jigs, supply the parts, and program the system through an intuitive 3D interface directly integrated on the cobot’s teach pendant through Vectis’ URCap software plugin supplied. The pendant includes a full weld library developed by Vectis Automation, providing standard settings for common weld jobs, including Pattern and Tack tools. “I am by no means a certified welder,” says Jordan. “I’ll just grab any of the guys out of the shop that are welders, and I’ll say, ‘Okay, I’ll run the pendant. You go ahead and run the torch and put it where you want it. Where do you want the weld to start; where do you want it to stop; what angle do you want it to do?’ And we’ve thought through some very advanced welds.”

Efficient MIG welding with UR10e cobot

When I zoomed in and discovered Vectis Automation’s Cobot Welding Tool powered by Universal Robots, it became obvious that this combination was the right way to go.

Travis Jordan, Owner and President, MT Solar

Ease of deployment

The enthusiasm in MT Solar had been building prior to the arrival of the cobot, which made for a “very interesting” first morning together, Jordan recalls: “The robot shows up on the truck and of course I’m all excited about it. I walk out of the office and I’ve got employees already cutting shrink wrap off the robot and getting ready to set something up. I was like, 'Hang on! I want to play!' We had production parts running that afternoon,” says Jordan.

The best thing about the system is that you don't have to be a rocket scientist to use it, says MT Solar’s operations manager, Mike Gillin, a certified welder at MT Solar: “I’m a welder by trade, but I didn’t know anything about robots, and I’m not very computer-savvy. Curiosity attracted me to the robot and I was really surprised at how easy it was to figure it out.”

Low barrier to entry

The flexible financing and rent-to-own options offered through Vectis Automation enabled MT Solar to test out the entire system without a large financial commitment at the outset. “This is a system that I can rent or lease for a very short period. I can afford that. If it doesn’t work, I’m not saddled with the thing. It made it really easy for us to get started,” says Jordan. The tangible ROI of the system is clear, since it adds another welder to the team, Jordan adds, which provides “a real clean one-and-a-half, two-year ROI, just on hard number labor savings.” The intangible ROI is “probably even more valuable,” notes Jordan, because the cobot has had “such a far-reaching impact on both customers and employee morale.”

Repeatability, improved quality & competitiveness enhanced

Human welding can accommodate –and introduce-- a lot of variance, says operations manager, Gillin, especially when it comes to monotonous work and relying on the ‘calibrated thumb.’ “We’ve built up to 7,500 small parts over a winter. For an operator to sit and do that; you can tell where they’ve gotten sick of it, and some of those parts end up being scrapped,” says Gillin. The cobot welder now performs that repetitive work. For owner Jordan, the system offers the repeatability that manufacturers crave and helps MT Solar maintain consistent product quality: “Our customers are always excited when we tell them, ‘Hey, you know, that part was welded on a robot.’

They go to put it on, and it looks exactly the same as the last one and they look high quality,” says Jordan. “I think Universal Robots’ system with Vectis is the best one I’ve run across. It’s wonderful.” Furthermore, the consistency and flexibility of the system enables MT Solar to compete with large corporations,” says Jordan. “It allows us to combine industrial quality and scalability with the innovation and the nimbleness of a small company, which we think is an extremely powerful combination.” MT Solar plans to acquire more cobots soon for new tasks such as the manipulation of heavy and larger parts, which will also alleviate some of the lifting performed by employees. As operations manager, Gillin puts it: “We’ve got a shop full of people that will come up with ideas just based on their exposure to it.”

Boosting consistency and innovation: MT Solar embraces cobot welding for quality and scalability

Automation challenges solved:

Ability to meet 300% seasonal increase in demand without hiring extra staff

High value staff freed up to focus on more skilled tasks

Ergonomically unfavorable jobs now automated

Ability to automate high mix/low volume production

Key value drivers:

Employees freed up for more value-added tasks

Tangible ROI of 16-24 months, intangible roi much shorter

Improved quality

Collaborative and safe

Quick and easy diy set up and programming

Easy troubleshooting and low maintenance

Improved competitiveness

Tasks solved by collaborative robots

Automated MIG welding of wide range of small batch parts

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