Laser Welding Automation: Very Important Points You Should Know

1. Choosing the Right Laser Source

The laser source is one of the most important components of a laser welding system.

For industrial metal welding, fiber lasers have become widely used because of their efficiency, reliability, and relatively low maintenance requirements.

However, a higher-power laser does not necessarily mean better welding results.

The beam profile is also worth considering. In some applications, ring beam / adjustable ring mode (ARM) technology can redistribute laser energy between the center and surrounding ring, helping improve welding stability, penetration, and weld appearance.

Ring-beam solutions can also be considered when they provide a meaningful advantage for a specific welding application.

2. Choosing the Right Laser Welding Head: Wobble or Standard?

The laser welding head is another important consideration.

A wobble laser welding head can provide greater flexibility in controlling the beam movement, helping adjust weld width, penetration, and surface appearance for different joint designs.

For automated welding, the laser head also needs to work properly with the robot, motion path, fixture, and welding parameters

3. Robot Accuracy Matters

Robot repeatability is another critical factor in automated laser welding, especially for precision applications.

Lower-cost robots may have insufficient repeatability, and accuracy can deteriorate over time, causing the welding path to gradually deviate from the programmed position. For precision laser welding, even a small deviation can lead to inconsistent penetration, weld position, or overall weld quality.

That is why robot repeatability, rigidity, and long-term stability should be carefully evaluated—not just the robot’s payload and reach.

4. Automation Is More Than a Robot and a Laser

This is one of the most important factors—and one that is sometimes overlooked.

A robotic laser welding system is not simply: Laser + Robot + Welding Head.

A reliable production cell may include:

• Robotic Precision

• Laser source

• Welding head

• Custom fixtures

• PLC and electrical control

• Sensors and vision

• Safety systems

• Fume extraction

• Loading and unloading

• Process monitoring

• Factory testing

• On-site commissioning

• The fixture, for example, can have a major impact on welding consistency.

• Even a high-quality laser and robot can produce unstable results if the workpiece is not positioned accurately or if the fixture cannot control deformation during welding.

• This is why customers should evaluate the complete automation engineering capability of a supplier—not just the machine itself.

5. Laser Welding Process Experience Matters

Hardware is only one part of the solution. The real challenge often begins when you need to achieve stable welding in production.

Welding an automotive component is very different from welding a sheet-metal enclosure, transmission component, battery component, medical device, or precision mechanical part.

Without sufficient process experience, manufacturers may encounter:

• Porosity

• Lack of penetration

• Excessive spatter

• Undercut

• Burn-through

• Deformation

• Inconsistent weld appearance

• Unstable cycle times

Therefore, when evaluating a laser welding automation supplier, it is important to ask:

Does the supplier understand laser welding as a process—or are they simply integrating hardware?

6. Nova Laser System

Nova takes a somewhat different approach.

Rather than focusing primarily on laser sources or standard laser machines, Nova focuses on customized laser welding automation systems.

The company provides engineering capabilities covering:

• Mechanical design

• Electrical engineering

• Robot integration

• Custom fixture design

• Laser welding system integration

• Automation control

• Welding process development

• Factory testing

• On-site commissioning

• After-sales technical support

One of Nova’s strengths is its engineering organization, with more than 50 professionals across mechanical design, electrical engineering, automation and commissioning.

The team has also accumulated practical experience in laser welding processes across different products and industries.