Cobot Welding: Is It Right for Your Shop?

Cobot welding fits some operations better than others. Here is how to tell whether it fits yours, and what to plan for after the crate arrives.

Companies across North America continue to face a shortage of qualified welders while demand for product holds steady or climbs. The American Welding Society projects that 320,500 new welding professionals will be needed by 2029, with more than 157,000 of the current workforce approaching retirement.

For a shop owner, that shortage takes a familiar form: postings that stay open, and certified welders spending full shifts on simple, repetitive parts.

Cobot welding has become a common first step into automation in response. Collaborative robots accounted for 19.6% of all robots ordered in North America in 2025, according to the Association for Advancing Automation, and reached 28.6% of units ordered in the fourth quarter.

Adoption on the shop floor is still early, and every owner weighing it faces the same two questions: is a cobot right for this work, and what will it change about how the shop runs?

Tregaskiss has manufactured MIG guns for automated welding since 1967, and the gun it builds for robotic welding, the CA3 robotic air-cooled MIG gun, is the same gun it recommends on a collaborative arm. That experience points to the shops where a cobot succeeds. It also points to one change a cobot brings that owners rarely plan for, and it has nothing to do with the robot.

Where a Cobot Fits

A cobot is a collaborative robot arm designed to work safely alongside people, typically without fencing. It moves more slowly than an industrial robot, with shorter reach and lighter payload, and it costs a fraction of what a fenced cell costs. For many operations it serves as the first step into welding automation.

	Cobot	Industrial robot
Safety	Works beside operators, typically no fencing	Requires guarding and a defined safety envelope
Speed	Slower by design, to stay safe around people	Substantially faster cycle times
Reach and payload	Short reach, light payload	Long reach, heavy payload
Programming	Guide the arm by hand and save points, no code	Teach pendant or offline programming, skilled operator
Part motion	No coordinated positioner control	Arm and positioner move together on one path
Best suited to	Small repeatable parts, low to medium volume	High volume, complex geometry, rotating parts

The work that suits a cobot is repeatable. There is a simple version of this test that takes about ten minutes on a shop floor. Pallets of identical small parts, stacked and finished, every one of them welded by hand, in a shop with no automation in sight. Parts like those repeat, and so does the labour being spent on them.

Repeatability counts for more than difficulty here. A complex weld that arrives in the same position every cycle can be automated. A simple weld on a part that shifts between fixtures cannot.

Size is the next consideration, and the table is only the starting point. A table-mounted cobot handles parts that fit a four foot by four foot surface, with some overhang acceptable as long as the arm can reach the joint.

Builder configurations remove the table entirely and mount the arm on a wall, a ceiling or a magnetic base. One repair operation used a magnetic base to run hard facing on excavator bucket teeth, work that would never fit a table. The limit is reach. If the arm can get to every weld, the part is a candidate.

Some work remains outside cobot territory. Shipbuilding and large vessels call for industrial robots, as do very long continuous seams. So does any part that must rotate in synchronization with the arm while it welds, because a cobot cannot coordinate with a positioner.

Operations that need the part and the arm moving together are looking at a full robotic welding cell. That is a different scale of investment, and a different conversation.

The last consideration is people, in two respects. Someone in the building has to own the cell, running it and maintaining it, and that person should be named before the purchase order goes in. The good news is that the role fits people at both ends of a shop’s roster. It does not take a certified welder.

A newer operator with basic knowledge of technique, enough to set a work angle and judge a finished bead, can be programming within about half an hour, because there is no code involved. The arm is guided by hand to each point, the position saved, and a test cycle run. At the other end, an experienced welder nearing the end of a career, no longer wanting the physical strain but still carrying decades of judgment, is just as well placed to take the cell over.

What Changes When No One Is Holding the Gun

In semi-automatic welding, the welding operator does more than direct the arc. An experienced welder feels a contact tip wearing out. The arc becomes less stable, the wire wanders in the joint, and the tip gets changed before weld quality suffers. The same goes for a nozzle collecting spatter or a liner beginning to drag. This inspection happens continuously in every shop that welds by hand, and no one schedules it, because it comes built into the person holding the gun.

A cobot welds without that person. It follows its saved path while the operator loads the next fixture or tends another cell. That unattended time is precisely what the investment was for. It also means worn consumables no longer announce themselves.

A degraded contact tip will not stop a cobot. The machine continues along its programmed path, producing welds that look acceptable from across the shop, and the problem surfaces later, at inspection, after a full run of parts is finished.

Fenced robotic cells were engineered with this in mind. They typically include a nozzle cleaning station and scheduled tool center point checks from the day of installation. Most cobot cells include neither, because the cobot arrived positioned as simple equipment, closer to a new welder than a new production line.

The same logic extends to where the machine believes the wire is. Tool center point (TCP) is the reference every programmed path depends on, and it moves for ordinary reasons. A contact tip seated a half turn differently. A neck that has taken a knock. A diffuser that no longer sits square. A welder holding the gun corrects for this without thinking. A cobot cannot. Consistent consumable seating is part of what holds a programmed path in place over months, which is one more reason the front end deserves a routine.

The adjustment is not complicated. Front-end care moves from feel to schedule. A visual check of the contact tip, nozzle and gas diffuser belongs in the shift routine. Spare consumables belong on the shelf from day one, and spatter gets cleared from the table and fixturing before it changes how parts sit. None of this takes long. It simply has to be assigned, because the person who used to notice these things by feel is now doing something else.

Choosing Consumables for Unattended Welding

This is also why the gun and consumables on the arm deserve a closer look before the cobot arrives, or now, if one is already running on the floor. What comes on the arm depends on the package. A cobot bought through an ITW package arrives with the Tregaskiss CA3 robotic air-cooled MIG gun.

The CA3 is not a lighter-duty gun built down for a smaller robot. It is the same robotic gun Tregaskiss builds for fenced production cells, with the same replaceable unicable, the same neck and mounting options, and the same consumable platform. An unattended cell is exactly the duty it was designed around. 

Even the QUICK LOAD liners load from the front of the gun, without disturbing the wire or the feeder connection. A cell assembled from separate suppliers arrives with whatever gun the integrator selected. That gun and its consumables are worth checking against the duty the cell will run, because a package default is not always the automated-duty option.

The CA3 runs AccuLock consumables, which come in two systems. AccuLock S consumables are designed for semi-automatic, handheld welding, and they will work on a cobot. AccuLock R consumables are built for robotic and automated welding, with more robust inserts in the contact tip that extend life under sustained arc-on time.

For a cobot running production hours unattended, AccuLock R is the appropriate system, and it is the system Tregaskiss specifies for the CA3 in robotic and automated service. Longer tip life means fewer changes, and on an unattended cell it also means a longer window of consistent welds between the checks described above.

There is a practical benefit for the rest of the floor as well. AccuLock is a common platform, so contact tips cross over between the robotic system and the Bernard semi-automatic guns most shops already run. The nozzles and diffusers differ between the two, but the shared parts keep consumable inventory from doubling the day the cobot arrives.

Running a Cobot Day to Day

Weld procedures generally transfer as they are. The same wire and gas used in handheld applications will run on the cobot. A review is still worthwhile before the procedure is locked in, since a different combination can raise travel speeds on an automated setup.

Maintenance on the machine itself is light. The arm is well sealed against debris, and cable wear is external and easy to spot. Blowing out the power source with compressed air roughly every six months and scheduling yearly preventive maintenance on the arm joints covers most of it, with dusty environments on a shorter cycle.

The ongoing attention belongs to the front end of the gun, for the reasons above, and to the table, where spatter buildup gradually changes how repeatable parts sit in their fixtures.

Cost is the objection heard most, and it rests on older information. A cobot package today lands in the same range as a fully loaded work truck, a capital purchase most owners already know how to evaluate, while a skilled welder costs a comparable amount every year. The productivity side is just as concrete.

In one recent case, a part that took an hour to weld by hand came off a demonstration cell in 23 minutes, and the shop bought two. A shop does not have to be running at capacity to justify one, either. Programming moves between parts in minutes, whether the run is five pieces or five hundred, so the cell stays productive across a mixed workload.

Is Cobot Welding Right for Your Shop?

It is, if the parts repeat, they fit the working envelope, and someone in the building will own the cell. It is the wrong tool for vessels, long continuous seams, and any part that has to rotate in step with the arm.

For the shops in the first group, the welding side of the system is already engineered for the job. The CA3 and its AccuLock R consumables were built for sustained automated arc-on time, which is exactly what a cobot cell asks of them.

The planning that remains is the part no spec sheet covers. Stock the consumables, put the front-end check on the shift schedule, and name the person who owns the cell. A cobot takes the welder’s hands off the gun. The shops that do well with one never take their attention off it.

A Bernard and Tregaskiss specialist can help with either side of that: judging whether the parts on your floor fit a cobot, or getting more out of one that is already running.

Contact a specialist to start the conversation.

Frequently Asked Questions

Q: Should my shop get a cobot?

A: Yes, if your parts repeat in the same position every cycle, they fit a four foot by four foot working envelope, and someone in the building will own the cell. No, if the work involves large vessels, long continuous seams, or parts that must rotate in synchronization with the arm. Shops that fit should also plan for front-end consumable checks, since a cobot removes the welder who used to catch worn consumables by feel.

Q: What is cobot welding?

A: Cobot welding uses a collaborative robot arm fitted with a MIG gun to weld alongside people, typically without safety fencing. The arm is guided by hand during programming and moves more slowly than an industrial robot. It suits small, repeatable parts at low to medium volume.

Q: How is a cobot different from an industrial welding robot?

A: Cobots are lighter, slower and shorter in reach, and they work safely beside operators. Industrial robots are faster, carry heavier payloads and can coordinate with a positioner so the part and the arm move together, and they require guarding and skilled programming. Many shops start with a cobot and add a fenced cell later.

Q: Does my shop have to be busy to justify a welding cobot?

A: No. Programming moves between parts in minutes, so a cobot stays productive across a mixed workload. The stronger indicator is whether the same parts come back repeatedly, not whether the shop is at capacity.

Q: What size parts suit cobot welding?

A: A table-mounted cobot handles parts that fit a four foot by four foot table, with modest overhang. Builder configurations mount the arm on a wall, a ceiling or a magnetic base for larger or fixed workpieces. Ships, large vessels and very long continuous seams are not cobot work.

Q: How much does a welding cobot cost?

A: A cobot package lands in the same capital range as a fully loaded work truck, with configuration driving where it falls in that range. A skilled welder costs a comparable amount every year, which is the comparison most owners use when they evaluate the purchase.

Q: How hard is a welding cobot to program?

A: There is no code involved. The operator guides the arm by hand to each point, saves the position, and runs a test cycle. Most people are producing welds within about half an hour. Basic welding knowledge still applies, because someone has to set the work angle and judge a finished bead.

Q: Which MIG gun goes on a welding cobot?

A: It depends on the package. Cobots bought through an ITW package arrive with the Tregaskiss CA3 robotic air-cooled MIG gun, the same robotic gun Tregaskiss builds for fenced industrial cells, with AccuLock R consumables and QUICK LOAD liners that load from the front of the gun. Cells assembled from separate suppliers arrive with whatever gun the integrator selected, and that gun should be checked against the duty the cell will run.

Q: Which consumables should run in a cobot?

A: AccuLock R. It is built for robotic and automated welding, with more robust contact tip inserts that extend life under sustained arc-on time. AccuLock S is the semi-automatic system and will run on a cobot, but it is not designed for unattended automated duty. Contact tips cross over between AccuLock R and the Bernard semi-automatic guns many shops already run, which keeps consumable inventory manageable.