During long-term operation, laser welding equipment may experience performance changes due to working environment, operating methods, and maintenance conditions.

However, not every equipment issue requires immediate professional service. Many common problems can be identified and solved through basic inspection and proper maintenance methods.

For manufacturing companies, learning simple troubleshooting skills can help reduce downtime, lower maintenance expenses, and improve overall production efficiency.

This guide introduces common laser welding machine problems and practical solutions that operators can check before contacting technical support.

Ⅰ The Machine Cannot Start? Check Basic Connections First

Failure to start is one of the most common issues during equipment operation.

Before assuming there is a serious machine failure, check the following items:

1. Check the Power Supply

Confirm:

• Whether the main power switch is turned on

• Whether the voltage supply is stable

• Whether the power cable is securely connected

• Whether the circuit breaker has tripped

In many cases, the machine cannot start simply because of an abnormal power connection.

2. Check the Emergency Stop Button

Some operators may forget to release the emergency stop button after stopping the machine.

Make sure the emergency stop status is released before restarting the equipment.

3. Check the Control System Alarm

Review the display panel for alarm messages.

The alarm information can often provide an initial indication of the problem source.

Ⅱ Welding Quality Becomes Poor? Check the Protective Lens First

If the laser welding performance decreases, common symptoms may include:

• Dark weld seams

• Reduced laser energy output

• Unstable welding results

• Poor penetration performance

The protective lens should be checked first.

The protective lens is one of the most frequently used consumable parts in laser welding equipment.

Dust, metal particles, or oil contamination on the lens surface can affect laser transmission efficiency.

Recommended inspection steps:

1. Stop the machine safely.

2. Remove the protective lens according to the operation instructions.

3. Clean the lens with professional cleaning tools.

4. Check whether the lens has burns, cracks, or damage.

If the lens is damaged, replace it promptly.

Ⅲ Unstable Weld Quality? Check Welding Parameters

Some welding problems are not caused by equipment failure but by unsuitable parameter settings.

Common parameters include:

• Laser power

• Welding speed

• Focus position

• Shielding gas flow

• Wobble width (if equipped)

Laser Power Setting

Low power may cause:

• Insufficient penetration

• Weak weld strength

Excessive power may cause:

• Burn-through

• Increased heat input

• Workpiece deformation

Welding Speed

Too fast:

• Incomplete welding

• Poor weld continuity

Too slow:

• Excessive heat accumulation

• Wider weld seams

Shielding Gas

Check:

• Gas pressure

• Gas hose connection

• Welding nozzle condition

Insufficient shielding gas may affect weld appearance and quality.

Ⅳ Laser Stops During Welding? Check These Areas

If the laser suddenly stops during operation, check the following:

1. Welding Gun Cable Connection

Make sure the connection between the welding gun and main machine is secure.

2. Safety and Control Alarms

Check whether the machine shows:

• Safety protection alarm

• Temperature alarm

• System warning

3. Cooling System

Overheating may activate machine protection functions.

Check:

For air-cooled laser welding machines:

• Cooling fan operation

• Ventilation openings

For water-cooled laser welding machines:

• Chiller operation

• Cooling water level

• Cooling system condition

Ⅴ Wire Feeding Problems? Check the Wire Feeder System

For laser welding machines equipped with automatic wire feeding, wire feeding issues are also common.

Possible causes include:

• Incorrect wire spool installation

• Insufficient feeding wheel pressure

• Blocked wire guide tube

• Incorrect welding wire specification

Solutions:

• Check the wire feeding path

• Clean the guide tube

• Adjust feeding wheel pressure

• Confirm the correct wire type

Regular maintenance of the wire feeder can reduce wire jamming and feeding failures.

Ⅵ Welding Nozzle and Welding Gun Maintenance

The welding gun is an important component of a laser welding machine.

Long-term operation may cause:

• Nozzle wear

• Nozzle blockage

• Welding gun contamination

• Protective component damage

Daily maintenance recommendations:

• Clean the nozzle regularly

• Avoid collision damage

• Check protective lens condition

• Keep the welding area clean

Proper maintenance reduces unnecessary replacement costs.

Ⅶ When Should You Contact Professional Service?

Although many basic problems can be solved through simple inspection, professional support is recommended for:

• Laser source failures

• Control system problems

• Electrical component damage

• Internal equipment failures

• Problems that cannot be solved after adjustment

Laser welding machines involve precision optical and electronic systems. Operators should avoid unauthorized disassembly of internal components.

Ⅷ Preventive Maintenance Saves More Money Than Repair

Many equipment failures are caused by insufficient maintenance.

Companies can establish simple maintenance procedures.

Daily Checks:

• Clean equipment surfaces

• Check welding gun condition

• Review alarm messages

Regular Maintenance:

• Clean protective lenses

• Inspect cooling systems

• Check electrical connections

• Optimize welding parameters

Early problem detection helps reduce unexpected downtime and repair costs.

Conclusion

When welding equipment encounters problems, not every situation requires immediate after-sales service. By checking basic components such as power connections, protective lenses, welding parameters, gas systems, and wire feeding systems, operators can quickly identify and solve many common issues.

At the same time, regular equipment maintenance is essential to prevent performance decline caused by improper operation or insufficient care. Proper use and maintenance can reduce production costs and extend equipment service life.

As a professional laser welding machine manufacturer, PDKJ provides handheld laser welding machines, robot laser welding systems, and customized welding automation solutions. Our equipment focuses on welding performance, stability, and long-term reliability, while providing technical guidance, operation support, and after-sales service to help manufacturers reduce maintenance costs and achieve efficient, stable production.

WhatsApp	WeChat

If you have welding machine requirements, please contact Ms. Zhao

E-Mail: pdkj@gd-pw.com

Phone: +86-13631765713