Laser Cutting Machine Safety Operating Principles

Laser cutting machine safety operating principles

Professional training must be passed before operation

If the laser cutting machine is operated improperly during work, it is very likely to cause very serious injuries. Only operators who have received professional training and are familiar with the equipment structure, performance and operating system knowledge can carry out independent operations. According to industry statistics, more than 70% of accidents are caused by operators who have not received systematic training.

The training covers specific procedures for equipment start-up, emergency shutdown-related operations, and methods for determining common faults. In 2025, an accident occurred in a factory in Shenzhen. The reason was that a new employee turned on the machine on his own without participating in training, causing the laser beam to accidentally irradiate his arm, causing deep second-degree burns.

Wearing protective equipment is a mandatory requirement

When operating a laser cutting machine, be sure to wear appropriate labor protection equipment in accordance with regulations. When working near a laser beam, you must wear protective glasses that meet the regulations. Ordinary glasses cannot effectively block lasers with specified wavelengths. In 2024, at a company in Shanghai, a worker took off his goggles because he disliked the stuffy heat. As a result, his eyes were burned by the reflected laser, and his vision was permanently reduced.

Among the protective equipment, there are anti-static overalls, anti-cut gloves, and safety shoes. They can effectively reduce the degree of personal injury caused by an accident at the moment. They are by no means the kind of irrelevant, dispensable things that are just there.

Unknown materials are strictly prohibited from being processed at will.

If you haven't figured out whether a material can be laser-irradiated or heated, don't process it. There are some materials that will generate toxic smoke or toxic vapor when laser is applied, which can cause damage to the respiratory tract. For example, plastics and certain coating materials containing chlorine will release highly toxic gases when exposed to high temperatures.

Consulting the material safety data sheet is a must before processing, and if necessary, sample testing must be performed. In 2023, there was a small workshop in Guangzhou that violated regulations. It implemented the safe operating principles of laser cutting machines for processing unknown plastic sheets. The final result was the release of hydrogen chloride gas, which caused three workers to be poisoned and hospitalized. This lesson is extremely painful.

You are not allowed to leave your post without permission during work

When the equipment is turned on and running, operators are not allowed to leave their posts without authorization, nor are they allowed to entrust others to manage it on their behalf. If it is really necessary to leave, be sure to stop the machine or cut off the power switch. During the cutting process, the laser head is in high-speed motion. Once an abnormality occurs, the operator must handle it immediately on site.

A large number of serious accidents occur during those few minutes when the operator is briefly removed from the present moment. In 2025, a worker in Foshan went to the side to answer a phone call. When he returned, he found that the cooling water pipe had broken. The coolant splashed into the circuit and caused a short circuit and a fire. Fortunately, the fire extinguisher happened to be right next to his hand, so it did not cause disaster.

Fire extinguishing equipment must be readily available

Fire extinguishers must be placed within easy reach. When production and processing are not in progress, the laser or shutter must be turned off. Paper, cotton, or other objects that are prone to fire are absolutely prohibited from being placed near the laser beam without protective measures. Laser cutting will produce high-temperature slag. Once this slag splashes out, it may cause surrounding items to be ignited and catch fire.

The fire extinguisher pressure gauge should be checked every week to ensure that it is in a usable condition. In 2024, a company in Dongguan lost its effectiveness because the fire extinguisher exceeded the expiration date . Small flames could not be extinguished and extinguished in time, and eventually the entire equipment was burned, causing losses of more than 800,000 yuan.

Immediately shut down the machine for troubleshooting if any abnormalities are found.

When an abnormality is detected during the processing, the machine needs to be shut down immediately and the fault must be rectified or reported to the supervisor. Frequently seen abnormal signals include a sudden drop in laser power, rough cutting sections, abnormal noises from machine tools, etc. Do not force continued processing after discovering a problem, otherwise key components may be damaged.

After an abnormal shutdown occurs in the equipment, it is necessary to cut off the power first and stop it, causing all moving parts to completely stop, and then carry out inspections. During 2023, an operator in Suzhou noticed an abnormal sound coming from the cutting head. However, he did not take any action to stop the machine. Instead, he used his hand to touch the area, and finally got his finger caught in the transmission gear range, which resulted in a comminuted fracture.

Keep the site clean, orderly and free of oil and grease

The laser, machine bed, and area must be kept clean, tidy, and free of oil stains. Workpieces, plates, and waste materials must be stacked according to regulations and must not be dropped to the ground indiscriminately. Oil contamination will not only affect the heat dissipation of the equipment, but may also cause fire accidents.

1. At the end of each shift, cutting residues and dust must be cleaned up. 2. Lubricate the guide rails regularly. 3. Do you also need to add lubricating oil to the screw regularly? 4. In 2025, there will be a factory in Zhejiang. 5. Is this factory overstocked with waste? 6. This will cause laser reflection. 7. Eventually the laser lens set worth 150,000 yuan was burned. 8. This lesson is profound.

Gas cylinders must be used in compliance with regulations

When using gas cylinders, you should avoid damaging the welding wires, in order to avoid accidents that may cause leakage. The process of gas cylinders from use to transportation must be strictly implemented in accordance with the gas cylinder supervision regulations. Cylinders are not allowed to be exposed to the sun, and they are not allowed to be placed close to heat sources. When opening the bottle valve, the operator must stand to the side of the bottle mouth.

Cylinders used to store gas should be equipped with devices to prevent tipping, and the storage area should be well ventilated. In 2024, there was a company in Wuhan that was carrying out related operations. At this time, a worker in the company placed an oxygen bottle directly next to the cutting machine used to cut materials. Eventually, it was caused by flying sparks and caused the leaked oxygen to explode, causing two people to be seriously injured.

Strictly observe high voltage safety regulations during maintenance

When performing maintenance, be sure to follow high-voltage safety regulations. There are thousands of volts of voltage inside the laser power supply. After the power is cut off, the capacitor will still retain power for a relatively long time. Level one maintenance work must be carried out every 40 hours of operation or every week. Level two maintenance work must be carried out every 1,000 hours of operation or every six months. According to the wire cutting processing safety operating procedures , these must be operated in accordance with regulations.

Before carrying out maintenance operations, the electricity must be discharged and a warning sign must be hung. It is absolutely prohibited to carry out work with electricity on. In 2023, a maintenance worker in Chengdu touched the power module without discharging the electricity, and was ejected to a distance of two meters by the force of the electric shock. Fortunately, a colleague quickly and promptly implemented cardiopulmonary resuscitation measures to save his life.

Start the machine and perform a manual low-speed check first.

After starting up, you need to manually operate the machine tool at a low speed in the X direction, and also start it at a low speed in the Y direction. Then check and confirm whether there is any abnormality. Focus on checking whether the limit switch is in a normal state, whether the movement is smooth and smooth, and whether the cooling system has started running. Through this step, mechanical faults can be discovered in advance and whether there are errors in parameter settings.

Every year, there are many accidents where the limit switch loses its effectiveness, resulting in a crash. In 2025, an operator in Xiamen skipped the manual inspection step and went straight to automatic operation. In the end, the laser head hit the fixture, and the lens was shattered and cracked. The repair cost was as high as 30,000 yuan!

New programs must be trial run first

After inputting the new workpiece program, a trial run should be performed first and its operating status should be checked. The trial run simulates the trajectory, but does not turn on the laser, and is dedicated to ensuring that the path is correct and that no collisions will occur. This step can effectively avoid problems such as device damage caused by programming errors.

Raise the processing head to a safe height and observe the entire movement trajectory during the trial operation. In 2024, a company in Chongqing carried out processing operations with its new program without trial operation, which eventually caused the cutting path to deviate, turning workpieces worth 20,000 yuan into substandard products and discarded.

Observe the running status of machine tools throughout the process

When working, you need to pay attention to the operation of the machine tool to prevent the cutting machine from traveling outside the effective stroke range or causing a collision between the two pieces of equipment. Operators must always pay attention to the processing area and must not lower their heads to play with mobile phones or be distracted by chatting.

The content used for observation covers laser power indication, gas pressure, cooling water temperature, and cutting speed. In 2023, an operator in Nanjing was distracted while playing with his mobile phone, causing the cutting head to hit a raised corner of the workpiece, which eventually caused the lens unit to be scrapped, and the individual was fined 5,000 yuan.

Final thoughts for you

Excuse me, when operating a laser cutting machine on a daily basis, which safety detail is most easily overlooked? You are welcome to share your relevant experiences in the comment area, and at the same time like and forward this article, so as to help more colleagues stay away from the risks caused by accidents.