How to Increase Arc-On Time in a Welding Operation

A welding operation can have experienced employees, modern equipment, and a full production schedule without achieving the output those resources should support.

The problem is not always welding speed. Sometimes, welders simply aren't spending enough of their working day welding.

Arc-on time measures the time a welding arc is active. In manufacturing, it provides a useful way to understand how much time is spent performing the welding operation compared with the time consumed by preparation, handling, positioning, equipment adjustments, material shortages, and other activities.

Increasing arc-on time isn't about asking welders to work harder or compromising the quality of their work. It's about identifying the activities that interrupt welding and determining which ones can be improved.

For manufacturers looking to increase capacity without immediately adding employees or equipment, understanding arc-on time is a practical starting point.

What Is Arc-On Time?

Arc-on time is the period during which a welding arc is actively operating.

Arc-on time percentage is commonly calculated by dividing total arc-on time by the relevant available working time and multiplying by 100. Manufacturers should clearly define what time is included in the calculation so comparisons remain meaningful.

For example, an operation might examine how much of a welder's scheduled production time is spent welding versus preparing joints, moving parts, changing consumables, waiting for materials, or completing other tasks.

Not all non-welding time is waste. Joint preparation, inspection, equipment maintenance, and safe material handling are necessary.

The objective is to distinguish essential activities from avoidable interruptions.

Measure Before Making Changes

The first step is understanding where production time actually goes.

A manufacturer can begin by observing a representative production period and recording the activities occurring between welds. These might include locating parts, retrieving consumables, adjusting fixtures, moving assemblies, cleaning equipment, or waiting for material handling.

The measurement period should reflect normal production rather than one unusually efficient or unusually difficult job.

For high-mix operations, different product families may need separate measurements.

Once the major sources of interruption are visible, improvement efforts can focus on the activities with the greatest impact.

Improve Material Availability

A welder cannot maintain productive arc time without the necessary materials.

Missing parts, incomplete kits, unavailable filler metal, or delayed assemblies can create interruptions that have little to do with welding performance.

Manufacturers should examine how material reaches welding stations. Are components staged before work begins? Are jobs released with the required parts? Can employees locate the correct materials without leaving their workstations?

Better coordination between purchasing, fabrication, material handling, and welding can eliminate substantial waiting time.

Material readiness should be treated as part of welding productivity.

Reduce Unnecessary Part Handling

Moving and repositioning workpieces can consume a significant portion of production time.

This is particularly true when welding large or heavy assemblies.

Positioners, manipulators, appropriate fixtures, and material-handling equipment can help manufacturers reduce unnecessary movement and make joints more accessible.

The objective is to place the work in a suitable welding position while minimizing repeated handling.

For some operations, improving part positioning may create more productive capacity than increasing welding travel speed.

Evaluate Fixtures and Fit-Up

Poor fit-up creates interruptions before the arc starts and can contribute to defects after welding begins.

If welders repeatedly adjust parts, correct alignment, compensate for inconsistent gaps, or modify fixtures, productive time is being lost.

Fixtures should support accurate, repeatable positioning while allowing appropriate access to the joint.

Manufacturers should also examine upstream cutting, forming, and preparation processes. Inconsistent components can create recurring problems that become visible only when they reach welding.

Improving fit-up can increase arc-on time while simultaneously reducing rework.

Keep Consumables Available

Contact tips, nozzles, liners, electrodes, filler metal, and other consumables are essential to welding operations.

When employees regularly leave their stations to retrieve replacements, those interruptions accumulate.

Frequently used consumables should be appropriately stocked and organized near the work, with inventory controls that prevent shortages and unnecessary excess.

Standardizing compatible consumables across similar equipment can also simplify purchasing and replenishment.

The goal is to ensure welders have the correct materials available when they need them.

Improve Equipment Reliability

Unexpected equipment problems reduce arc-on time immediately.

Wire-feeding interruptions, worn contact tips, damaged cables, inconsistent gas delivery, and other equipment issues can stop production and create additional troubleshooting work.

Preventive maintenance helps address these problems before they become recurring interruptions.

Maintenance schedules should reflect equipment usage, operating conditions, manufacturer recommendations, and production requirements.

A machine that runs consistently creates more value than one that occasionally operates faster but requires frequent attention.

Examine Shielding Gas Handling

Gas supply can also affect productive welding time.

In cylinder-based operations, employees may need to retrieve, transport, connect, and replace cylinders throughout the shift.

At low consumption levels, this may be manageable. As production increases, cylinder handling can become a meaningful source of interruption.

Manifolded systems, MicroBulk, or other supply arrangements may reduce container handling where consumption and facility requirements justify the change.

Manufacturers should evaluate how much productive time is currently devoted to managing shielding gas.

The appropriate supply system should support production without creating unnecessary work.

Reduce Unnecessary Changeovers

High-mix fabrication shops frequently change materials, filler metals, welding procedures, fixtures, and equipment settings.

Some changeover time is unavoidable.

However, searching for fixtures, locating consumables, correcting incomplete job information, and repeatedly adjusting poorly organized equipment can make transitions longer than necessary.

Standardized setup procedures, organized tooling, prepared job kits, and clear production instructions can help.

The objective is to make necessary changeovers predictable rather than rushed.

Consider Automation Where It Fits

Welding automation can increase productive arc time in suitable applications by providing repeatable torch movement and reducing certain manual handling activities.

However, automation doesn't automatically eliminate bottlenecks.

A robotic cell still requires parts, fixtures, consumables, shielding gas, programming, maintenance, and effective loading and unloading.

Manufacturers should evaluate the complete production cycle before investing.

Automation delivers the greatest value when the surrounding operation can consistently support it.

Measure Quality Alongside Arc-On Time

Increasing arc-on time is not useful if it creates more defective welds.

A faster process that produces additional rework may reduce overall productivity.

Manufacturers should monitor weld quality, first-pass acceptance, rework, equipment interruptions, and completed production alongside arc-on time.

These measures provide a more complete picture of operational performance.

The goal is more acceptable finished work, not simply more minutes with the arc operating.

How nexAir Helps

nexAir supports welding operations through welding equipment, consumables, shielding gases, automation solutions, equipment repair, and industrial gas supply systems.

Through nexAir KnowHow, manufacturers can evaluate the factors affecting productive welding time, including equipment performance, consumable availability, gas handling, part positioning, and opportunities for automation.

Addressing those factors together helps customers identify improvements that support the complete production process.

Helping Customers Forge Forward

Manufacturers Forge Forward by understanding what prevents skilled employees and equipment from performing productive work.

Increasing arc-on time begins with measuring interruptions, improving material readiness, reducing unnecessary handling, maintaining equipment, and selecting appropriate supporting infrastructure.

When those improvements are combined with consistent quality, manufacturers can create additional productive capacity without treating welding speed as the only measure of success.