Laser Welding Machine Safety Warnings
LASER WELDING MACHINE SAFETY WARNINGS
Please read all safety information carefully before using the device and keep this manual for future reference. Failure to follow the instructions may result in serious injuries, material damage, or equipment malfunction. It is essential to comply with all specified precautions to ensure safe operation.
DANGER
Highest level of risk. Warns the user of an immediate and hazardous situation that may lead to severe consequences. Failure to strictly follow the instructions may result in death or life-threatening injuries.
WARNING
High level of risk. Indicates situations that may cause serious injury or equipment damage.
CAUTION
Medium level of risk. Indicates situations that may cause minor or moderate injury, equipment damage, or environmental harm.
GENERAL SAFETY RULES
Overview of Laser Welding and Main Hazards
Laser welding is the process of joining metals or other materials using high-intensity laser beams.
The following hazards may occur during this process:
Eye damage (permanent retinal burns) – both direct and reflected laser beams are dangerous.
Skin burns – high power density may cause severe burns on the skin.
Fire risk – due to metal melting and sparks.
Metal fumes and particles – inhalation may be toxic.
Electrical and cooling system failures – equipment-related risks.
Therefore, laser welding is only safe when all occupational safety measures are fully implemented.
*Since laser welding machines involve hazards such as high temperature, powerful laser radiation, and electrical current, they must only be operated by authorized and trained personnel.
*Users must carefully read this manual before operating the device and strictly follow all safety instructions.
*Intervention by untrained personnel is strictly prohibited.
*The area where the machine operates must be accessible only to authorized personnel and clearly marked with warning signs. Unauthorized personnel must not be allowed to enter the area.
Personal Protective Equipment (PPE) Rules
*Laser safety goggles are mandatory during laser welding.
*They must be suitable for the laser wavelength (e.g., suitable for 1064 nm fiber laser).
*The goggles must have the OD (Optical Density) value marked on them.
*Standard welding goggles do NOT provide protection against laser radiation!
*To protect against radiation, glare, heat, and fumes that may occur during laser welding, the area must be adequately ventilated and unauthorized access must be restricted with physical barriers.
*Operators must always use appropriate personal protective equipment (PPE) during operation. This includes laser safety goggles, heat-resistant gloves, protective clothing, and appropriate footwear. Since direct exposure of the laser beam to the eyes may cause permanent blindness, the welding process or laser beam must never be viewed with the naked eye.
*The location of emergency stop buttons must be known by all users.
*In situations where operators and maintenance personnel need to work safely at height, fixed or mobile access platforms must be installed. Suitable equipment such as cranes, manlifts, or other lifting systems should be used. Fall protection equipment (safety harnesses, anchor points) must be utilized. Non-fixed ladders, stools, or improper lifting equipment must not be used.
*During transportation, lifting equipment (cranes, lifts, etc.) must be used, and operators must be trained and follow lifting instructions carefully.
*Insufficient or unbalanced lighting may negatively affect the operator’s visual perception, leading to errors, loss of control, or accidents. Therefore, adequate lighting at appropriate lux levels must be provided in all working areas according to the task. Lighting performance should be maintained through regular maintenance and cleaning, and local (task-specific) lighting equipment should be used where necessary.
*Fumes generated during the process may cause respiratory problems, vision impairment, and, if proper conditions are not ensured, may pose a fire risk. Therefore, a local exhaust system must be installed and filters must be maintained regularly. Additionally, appropriate personal protective equipment (PPE) (such as masks and goggles) must be provided, and workplace cleaning procedures must be followed.
*The use of worn or damaged parts may lead to machine failures and occupational accidents. Therefore, periodic maintenance schedules must be followed, components must be inspected regularly, and any parts showing signs of wear must be replaced immediately. The use of appropriate PPE during maintenance is mandatory.
*Imbalanced operation of rotating parts in the laser welding machine may cause excessive vibrations, breakage, or parts being ejected. This creates a serious risk of injury for operators and may lead to machine failure. Rotating parts must be periodically checked for dynamic balance and operated within specified speed limits. Emergency stop buttons must always be accessible, and protective barriers must be used. Operators must be trained regarding these risks, and vibration levels must be monitored regularly. If abnormal vibration is detected, the machine must be stopped immediately.
*During manufacturing processes with the laser welding machine, carelessness in operations such as part placement, positioning, parameter adjustment, or laser application may lead to burns, mechanical entrapment, or faulty welding. System safety must be checked before welding.
*Machine motion limits are defined by software and hardware restrictions. These limits must never be altered. During manual operation, low-speed modes must be used, and the operator must remain attentive.
*During programming, it must be ensured that the part is correctly positioned and that all axes will operate within their defined limits.
*Before welding, it must be ensured that all parts are securely fixed. Only trained and authorized personnel should work during the welding process. Operators must use PPE (gloves, goggles, welding apron), stay clear of the operation area before the laser head starts, and emergency stop systems must be accessible. All system safety components must be checked before each operation.
*No liability is accepted for any damage, injury, or accidents resulting from failure to follow this manual.
The table below shows the symbols used in this manual and on the machine labels.
Electric Shock Hazard
Located around electrical panels, cable entries, and maintenance covers. The device must not be handled without disconnecting the power supply.
Laser Radiation Hazard
Used around the laser output area, on the machine, and at entry/exit covers. Direct exposure to the eyes or skin may cause serious injuries.
Flammable Material and Fire Risk
Used in environments where flammable materials are present or near gas cylinders. There is a risk of fire during laser operation.
General Warning Symbol
Used as a general warning sign in areas requiring attention. Usually accompanied by explanatory text.
Wear Laser Safety Goggles
Placed in visible locations within laser operation areas. Direct viewing of the laser may cause permanent blindness.
Wear Protective Gloves
Used in areas where there is a risk of contact with hot parts or during material handling. Provides protection against heat-related burns.
Wear Protective Clothing
Indicates that personnel must wear protective clothing resistant to laser and heat.
Read the User Manual Instructions
Indicates that the safety and operating instructions in this manual must be read carefully.
ELECTRICAL AND LASER SAFETY
*Electrical connections must only be performed by authorized technical personnel.
*Before starting the device, ensure that the grounding connection has been properly established.
*To prevent electric shock, the device must always be disconnected from the power supply during maintenance.
*During laser welding, exposure to direct or reflected laser beams must be avoided.
*Do not direct the laser torch toward any area other than the workpiece, as this may lead to serious safety hazards and fire risks
*Specially designed laser safety goggles must be worn. The goggles must be suitable for the laser wavelength.
*Laser warning signs must be placed visibly outside the operating area.
*The system must only be operated within laser-controlled zones.
*Lasers are classified according to their hazard levels as follows:
Class — Description
Class 1
Safe. The laser beam does not exit the device. Direct or reflected radiation is harmless.
Class 2
Visible wavelength (400–700 nm). Protection is possible through the blink reflex (max. 0.25 sec).
Class 3R
Requires caution. Short-term eye exposure poses a potential risk.
Class 3B
Hazardous to the eyes. Low skin risk. Reflected beams may also be harmful.
Class 4
Extremely dangerous. High risk to eyes and skin. May cause fire.
Laser welding machines are generally classified as Class 4 lasers.
Class 4 Laser Characteristics:
*The most hazardous laser class.
*Very high risk to eyes and skin.
*Can cause fire.
*Even reflected beams may cause serious damage.
*Therefore, for Class 4 lasers:
*Enclosed cabins should be used (if possible).
*An interlock system that shuts off the laser when the door is opened must be in place.
DANGER
This product emits an invisible high-power primary laser (Class 4) and a visible red laser (Class 2) during welding or cleaning operations.
FIRE AND ENVIRONMENTAL SAFETY
*It is strictly prohibited to work in the same environment with flammable and explosive materials during laser welding operations.
*If hazardous materials such as solvents, gas cylinders, or paint are present in the work area, the environment must be made completely safe before welding.
*Fire extinguishing equipment must be kept in an easily accessible location against potential fire risks.
*The environment where the device is located must be well ventilated and proper fume extraction must be ensured.
*Cables must be secured and organized properly. They must be kept away from walkways and moving parts.
*The welding area must be kept dry and clean. The floor must be dry, clean, and level. Anti-slip flooring or mats should be used. The area must be cleaned regularly, and any spilled substances must be cleaned immediately. Additionally, anti-slip safety footwear (e.g., SRC sole) must be used.
WARNING
Improper cable management may cause the operator to fall, damage to the cables, and fire due to short circuits. Cable arrangement must be checked before operation.
Fume, Gas and Metal Vapor Safety
*Fumes generated during laser welding:
*May be carcinogenic (especially those containing Cr⁶⁺).
*Inhalation may cause damage to the respiratory system.
*Therefore: Fume extraction systems are mandatory.
*Local exhaust must be positioned close to the welding point.
*General ventilation must also support the system.
Operator Protection:
*FFP2 / FFP3 mask
*Smoke detector for long-term work in enclosed spaces
EMI / EMC COMPLIANCE
Laser welding machines may generate electromagnetic fields (EMF) and electromagnetic interference (EMI) during operation. This may pose potential risks both to employee health and nearby electronic devices.
Safety rules to be observed:
*Grounding must be checked: Ensure that the device is properly grounded. Insufficient grounding may cause electromagnetic fields to spread.
*Use CE-certified equipment: Devices compliant with standards and protected against electrical interference (CE marked) must be used.
*Personnel with medical devices must be warned: Individuals with pacemakers or other sensitive medical devices must not be present in operating areas or must consult their physician.
*Electronic devices must be considered: It is not recommended to operate sensitive electronic devices (measurement instruments, computers, etc.) near the laser welding machine.
*Periodic measurements must be performed: EMF exposure levels must be monitored at regular intervals using appropriate measurement devices.
*The laser welding machine must only be used in EMC-compliant environments.
*Grounding of the sockets connected to the machine must be properly established and periodically checked.
*It must not be operated in the same environment with sensitive devices (medical devices, communication equipment, etc.).
WARNING
Long-term exposure to electromagnetic fields may pose certain health risks. Therefore, personnel working with the device for extended periods must take appropriate protective measures.
PERSONAL PROTECTIVE EQUIPMENT (PPE)
*PPE must be worn before starting work and must not be removed during the welding process.
*Goggles and gloves must be cleaned after welding, and any damaged equipment must be replaced.
*Laser safety goggles must not be used if the lenses are scratched, cracked, or damaged by UV exposure.
*Inappropriate clothing used during welding (nylon, synthetic, loose garments) may ignite and cause skin burns.
*The use of PPE does not replace laser safety; it only supports it. Environmental and machine safety must also be ensured.
*In noisy environments, hearing protection equipment (earmuffs/earplugs) must be used due to high noise levels. Regular hearing checks are recommended for long-term exposure.
ELECTROSTATIC DISCHARGE (ESD)
Sensitive electronic components in the laser welding machine are vulnerable to voltages caused by electrostatic discharge (ESD). Improper flooring, insulating clothing, or static charge from the user may cause ESD within the machine, leading to equipment failure or, in rare cases, fire.
*ESD-compliant flooring and proper grounding systems must be used during installation.
*During maintenance, adjustment, or handling of electronic components, operators must use ESD wrist straps and ESD protective clothing.
*Static charge must be discharged before touching electronic circuits.
*When ambient humidity is very low (especially below 30%), ESD risk increases; therefore, humidity levels must be monitored.
PRE-OPERATION CHECKS
Before starting the machine:
Is the electrical connection secure?
Are gas connections correct and leak-free?
Is the water cooling unit active?
Are the optical lens and protective lens clean?
Is the nozzle properly installed?
Parameter check
Parameters must be properly selected for welding quality and safety:
*Laser power
*Welding speed
*Pulse mode / CW mode
*Focus distance
Incorrect parameters may both create hazards and negatively affect work quality.
Emergency Procedures
In case of fire:
Turn off the laser.
Disconnect the power supply.
Use a fire extinguisher.
Shut off flammable gas systems.
In case of eye exposure:
Stop the operation immediately.
The person must not rub their eyes.
They must be directed to a medical facility as quickly as possible.
In case of system failure:
Disconnect the device from power.
Do not operate the device until authorized technical service arrives.
Daily Checklist (Summary)
Must be checked before operation:
*Are the laser safety goggles appropriate?
*Is the ventilation system working?
*Is the fire extinguisher accessible?
*Is the protective lens clean?
*Are gas and electrical connections secure?
*Is the operator’s PPE complete?
*Is the working area clean and safe?
