You’ve probably heard the cobot pitch by now. But in case you are new to collaborative robots, this is the rundown: cobots are easy to program, safe around operators, and guided by hand. They can weld far faster than a human. And yes, they are designed for high-mix, low-volume welding automation.
However, nuances of reality matter a lot. Achieving cobot welding success isn’t that simple.
Cobot welding is only as good as your operating procedures and the system’s ability to adapt when something inevitably changes. You can have the most advanced collaborative welding robot on the market. If it can’t grow with your changing production requirements, it becomes an expensive bottleneck. While this may sound abstract, we’ll break it down in great detail in the article below.
Here’s what you need to know about cobot welding, including the limitations most vendors won’t mention until after you’ve hit the wall in your production.
Cobots Are Tools For Your Welders
Cobots work alongside your welders, not instead of them. Welders focus on part presentation, parameter adjustments, and quality decisions that require human judgment. Cobots execute the actual welding. It all works, IF your processes work.
Programming a cobot is straightforward:
If your welder can set up a welding machine, they can program a cobot.
- Your welder physically moves the cobot arm to the start and end of welds and record those positions. (some companies like THG have developed a wrist puck that allows to keep both hands on the robot while recording those points)
- Then, they fine-tune the weld and welding parameters on the teach pendant.
- The cobot records the recipe and repeats it consistently.
- No coding expertise required.
“Within the four hours I was there, we programmed 20 weld points. It proved to me that if I can learn to program it in four hours, there’s no doubt the system can work in our shop. I wrote the purchase order that same night.” —Greg LeFevre, CEO at Raymath, discussing just how easy it was to learn to use THG Automation cobot welding systems.
Human-cobot safety interaction is built in through force-limiting technology. When a cobot detects unexpected contact, it stops immediately. You can also use area scanners to slow down or stop cobot activity if a human enters the work area. No need for safety cages that consume floor space and complicate workflow integration.
The result?
Your skilled welders can handle more complex work while cobots manage the routine tasks. One welder can oversee multiple operations, scaling their expertise across your shop.
But, here’s a big BUT: cobots only work if your preparation processes are consistent. A cobot can’t compensate for parts with varying fit-up or unreliable fixtures. You’ll spend more time troubleshooting than welding.
Get your welding processes dialed in first. Then introduce cobots to scale what already works and boost productivity. And choose systems that can support flexible growth. You might work on simple brackets now, but more complex jobs can come up. You want your system to adapt, not collect dust.
Cobots Outperform Traditional Robotics For Small-Batch Production
Traditional industrial robots excel at one thing: high volume, serial production. For a job shop welding 300 brackets this week and 150 different assemblies next week, traditional robotics are a nightmare of complex programming and expensive setup changes.
Cobots flip this equation.
- Programming time drops from days to minutes.
- Set up changes that required robotics engineers now take your welder 15-30 minutes with a teach pendant.
- Installation happens in existing floor space without safety cages or facility modifications.
You can literally roll a cobot system into place and start welding today. This flexibility makes cobots ideal for high-mix, low-volume production.
But here’s what the marketing glosses over: not all cobot welding systems can adapt to every scenario. If you suddenly need another welding process or a positioner, your system must adapt, or you are forced to buy an additional system from another vendor. This isn’t specific to cobots, but it is something cobot marketing often ignores.
Main Cobot Welding Benefits Are Arc-On Time And Consistency
No human can match the level of consistency the right cobot welder can provide. Top that off with significantly higher arc-on time, and you are clearing the backlog in no time. However, all of the cobot welding advantages are dependent on the cobot’s ability to match what the job needs. Repeatable part presentation and the system’s ability to adapt to the task are critical to genuinely benefit from cobot welding.
Higher Productivity
Manual welders achieve 10-30% arc-on time in typical production. Cobots push that to 60-80% by eliminating fatigue, breaks, and positioning inconsistencies. One welder can oversee multiple cobot operations, multiplying their output.
Experienced welders can also be freed up from repetitive work. If they set up a cobot to run a batch of parts and weld something critical manually, their skills are used more efficiently.
THG’s customer, TMF Center, that manufactures steel assemblies has put it beautifully:
“We want to give employees a third arm – more power, more ownership, more time to be yourself.” —Zach Van Meter, Owner/Operator at TMF Center.
The “third arm” is what skyrockets productivity. Cobots are the extension of your team, doing the work your welders program themselves.
Consistency
Cobots eliminate human variability in travel speed, torch angle, and parameter control. Manual welding typically varies ±15% in travel speed. Cobots maintain repeatability, significantly reducing rework. This consistency extends to wire feed speed, weld deposition, voltage settings, and heat input. Human welders can easily drift from consistent application of these parameters with repetition.
Consistent weld quality is the #1 factor for any high-value job. Once you are ready to take your shop to the next level, you introduce tools that make consistency the norm. It’s the cornerstone of any successful welding business.
Improved Weld Quality
Manual welding will always have varying results, especially for repetitive jobs. A cobot isn’t going to lose focus or get tired. Therefore, you aren’t producing any scrap. No parts that are “okyish” or with weld defects. Once you dial in the settings and let the cobot run its course, you’ll get high-quality welds, every time.
Granted, this requires consistent part preparation and precise fixturing. While cobots can handle slight part variability, you won’t get good results if parts aren’t consistent enough. They can’t adapt as a human on the fly.
However, technologies like the WireSense from Fronius available with THG cobot systems can locate and follow a variable joint. The WireSense allows the wire itself to act as a sensor that detects joint variability. The cobot receives this information and recalculates its positioning to make up for joint variation.
Weld quality also depends on the job type and the needed auxiliary tools. For example, some jobs require a cobot that supports working with a positioner and coordinated motion. If your cobot isn’t meant to integrate it, it’s useless for such jobs.
That’s why modular cobot solutions that can grow and adapt to your needs are critical for long-term success.
For example, PikRite needed a far larger reach than cobots can provide. This wasn’t an issue for a modular cobot welding system from THG Automation. We simply integrated a linear rail with the cobot to provide the reach they needed. If our systems weren’t designed for flexible growth, Pik Rite would be forced to buy another welding system.
Better Safety
Cobots help minimize exposure to welding hazards that plague manual operations. Automated welding keeps welders at safer distances from harmful arc radiation and welding fumes.
Likewise, the chances of a burn injury or repetitive strain injury are nearly eliminated. Welders won’t be holding the torch all day or be sprayed with spatter. So, they get a far more comfortable work environment and less hazard exposure.
Unlike traditional robotics, cobots don’t need significant safety measures. For example, you don’t need to use safety fencing to separate humans and robotics. However, you will need welding curtains to prevent arc exposure and fume extraction systems.
Still, cobots aren’t automatically safe because they’re collaborative. Every installation requires a proper safety assessment to ensure the complete welding process meets safety standards for collaborative operation (ISO 10218-2 and ISO/TS 15066).
Lower Operational Costs
Reduced rework cuts material costs significantly. Likewise, cobots reduce overwelding, which wastes up to 500% more shielding gas than necessary. Overwelding can also drastically increase the wire use by producing larger welds than required. Cobots optimize gas and wire use by maintaining consistent parameters. You dial in what’s needed to meet customer specs, nothing more, nothing less.
While it sounds too good to be true, consumable savings alone can and often do pay off the entire cobot system. They can save you more money than labor savings alone.
You will also save significant resources in spatter cleanup labor. Precise travel speed and contact-tip-to-work distance minimize spatter that’s time-intensive to remove.
Pair cobot welding with advanced power sources, and the results get significantly better. For example, Fronius Cold Metal Transfer (CMT GMAW) is virtually spatter-free and significantly reduces distortion. This technology is available with THG cobot welding systems, allowing you to improve quality like never before.
Finally, the labor cost per job goes down. While you still need actual welders, they get more done with less effort, reducing the cost per weld.
Labor Shortage Solution
Cobots multiply existing welder capabilities rather than requiring additional skilled labor. One experienced welder can manage multiple automated stations, amplifying their expertise across your shop. This addresses the skilled labor shortage by making your existing team more productive.
And you actually get to keep your welders instead of losing them to job hopping. Welders typically don’t stay long in repetitive welding positions. A cobot can change that. The job becomes much more tolerable and there’s less fatigue buildup over time.
However, your cobot welding system must be able to grow and adapt to future work, not just what your shop is doing now. Imagine if you acquire a MIG welding cobot and all is working great. Then, a job comes along that requires a welding process your vendor doesn’t support (e.g., laser or TIG welding). You either fall back to manual welding or get a cobot from another vendor. You don’t want to do either.
Another supplier means additional cobot training and integration complexity. Instead, you should work with system providers like THG Automation. You can install additional cobots for different welding processes, auxiliary systems like positioners, or other tools and features using the same software. No additional training required.
So, you don’t trade labor shortage for another set of limitations and you get to grow in any direction you need. Your team leverages the experience with your first cobot and just builds from there.
Waste Reduction
Automated travel speed and consistent heat input minimize distortion and reduce scrap rates. Likewise, consistent welding eliminates the need to grind or gouge excess weld deposition. Parts come out right the first time, reducing the material and time costs of rework or scraped parts.
It’s particularly important to have sound upstream to reduce scrap. This is where cobot’s ability to consistently repeat the process quickly loses value if parts vary too much. The wire hitting the wrong part of the beveled weld joint, inconsistent joint wall thickness, and similar part variability will cause spatter, excessive or insufficient weld deposition, undercutting, etc.
Intangible Benefits
Often overlooked, the intangible cobot welding benefits are incredibly valuable. In fact, this is what moves the needle the most. Yes, productivity is critical. But, gaining and retaining customers while entering various markets gets you to the next level.
- Consistently hitting the customer schedules
- Being able to adapt to new part designs
- Having energized staff, instead of exhausted welders from overtime
- Improved employee health
- Better welder retention and compounding of their acquired skills
- Ability to enter new markets
- No more dreaded backlog
It’s about improving your capabilities and operational resilience. That’s what truly compounds growth.
Of course, this does mean working with systems that can grow with you. If you can’t introduce another welding cobot with a different process, a positioner, or other hardware without a hassle of a fresh integration and training, you’ll hit a wall. No simplified hardware expansion on a unified platform, no genuine long-term growth.
Cobot Welding Costs Paint An Incomplete Picture
Entry-level welding collaborative robots typically cost $75,000–$125,000. More capable systems with external axes and multi-process capabilities are in the range of $150,000–$225,000.
However, these numbers don’t mean much on their own. Cobot welding systems are production capability tools, not simple labor replacements. They cut operational costs and deliver ROI when they eliminate bottlenecks. But they create expensive problems when they can’t grow in the direction you need.
Initial hardware cost matters far less than long-term expandability. A $125,000 entry-level system looks attractive until you need some welding capability your vendor doesn’t support. Now you’re facing the cost of another cobot integration, installation downtime, staff retraining, and workflow disruption.
The hidden costs emerge when you choose systems that can’t grow with your business. Installing a second system from a different vendor means different training programs, separate maintenance protocols, and incompatible hardware. Your “cost-effective” automation becomes a collection of expensive machines running different software.
What makes the system effective long-term is the ability to use your existing staff training for any additional robotics or auxiliary systems. So, your staff is only trained once. The next cobot with a different welding process? They just use the experience gained with the first one.
One-Size-Fits-All Cobot Welding Package Is a Myth
Many “plug-and-play” cobot welding packages can’t handle real production environments. The components are too flimsy, the vendors don’t understand welding, and the systems can’t expand when your requirements change.
The marketing promises sound perfect: “a complete cobot welding solution that handles all your applications out of the box. Just unpack, plug in, and start welding everything from brackets to complex assemblies.” Yeah, that will happen. In Lala Land, maybe.
Reality hits differently on the shop floor.
Many cobot packages reveal their limitations quickly in real production environments. Flimsy mobile platforms with weak casters that wobble. Thin welding tables that flex under load or get damaged easily by arc strikes. Budget torches that can’t handle industrial duty cycles or harsh mechanical contact. These are productivity killers when the system fails in a genuine industrial environment.
Here’s the root problem: most vendors are robot companies selling welding accessories, not welding experts building robotic welding systems. They understand robot kinematics but miss the nuances of welding metallurgy, process control, industrial requirements, and just daily realities on the shop floor.
While cobots offer genuine flexibility in programming and positioning, they can’t magically adapt to every welding scenario. That “universal” MIG welding package struggles when you need precise TIG work for thin-gauge piping for exhaust systems. The standard fixturing falls apart when part geometries change and require positioners to rotate the part.
See the video below for example. The THG Automation’s Coordinated Motion technology allows all of our welding cobots to move in sync with a rotating positioner. That’s just one example of a critical modular expansion your cobot should support. Without it? The cobot is limited for any application requiring it (and plenty of them do).
You need more than welding robot flexibility; you need expansion flexibility. The ability to add welding processes, external positioning, and upgraded components without starting over with a completely different system.
Choose A Cobot System Designed For Growth
The most expensive cobot mistake isn’t buying the wrong robot, it’s buying a system that can’t evolve with your business.
Smart manufacturers choose modular platforms that allow adding welding processes, positioning equipment, and additional robots without infrastructure replacement or staff retraining. When you need to handle larger assemblies or add external positioning, the system expands rather than multiplies.
For example, THG Automation cobot welding systems support external axes, rotary positioners, tracks, and coordinated motion. Likewise, all welding and cutting processes utilize the same interfaces and are developed by a single vendor. THG extends your capability envelope without forcing you to start over with different vendors. Your welder learns one system that grows, rather than multiple systems that fragment their expertise.
Evolutionary systems add features through software updates and modular hardware. Replacement systems become obsolete when requirements change, forcing expensive do-overs. Unless your welding cobot system allows for growth without staff retraining and rebuilding the infrastructure, it will limit you. Don’t fall for marketing hype. Think ahead and envision if the cobot system can let you grow in multiple directions.
Contact us today, and our welding and robotic experts will help you build the welding system that meets today’s needs. But more importantly, it’ll be ready to update for anything that comes your way in the future.
