Read and get familiar with all safety precautions and procedures before using the machine. Strictly follow all safety precautions. Ensure that the machine is properly assembled and is working properly. 

1. Laser safety

Lasers are categorized into several different classes depending on the extent of the potential hazard associated with the laser, with Class 1 being the least dangerous and Class 4 the most dangerous. The United States Food and Drug Administration has indicated that Class 4 lasers may pose an "immediate skin hazard and eye hazard from exposure to either the direct or reflected beam; may also present a fire hazard."

xTool MetalFab Laser Welder is classified as a Class 4 laser machine. It includes a Class 4 working laser and a Class 1 indicator laser. The working laser emits invisible light at a wavelength of 1080 nm ± 10 nm. For power specifications, please refer to the corresponding user manual. Direct exposure to this level of light can cause severe eye or skin damage. Reflected or scattered laser radiation can also cause severe retinal and/or corneal damage resulting in permanent eye damage. When used with xTool MetalFab Laser Welder, the fully assembled xTool MetalFab CNC Cutter becomes a Class 4 laser product. Diffused laser beams may leak out from the openings on the sides of xTool MetalFab CNC Cutter or those on the raised riser base, and you may be exposed to laser radiation greater than Class 1. Therefore, the fully assembled machine of xTool MetalFab Laser Welder and xTool MetalFab CNC Cutter is intended for professional use only, and extra care should be taken during use to ensure safe operation.

When using xTool MetalFab CNC Cutter with xTool MetalFab Laser Welder, follow the safety precautions:

• ONLY personnel professionally trained on laser safety are allowed to use the product. A qualified Laser Safety Officer (LSO) must be designated and the product shall be operated by or under the guidance of the LSO. LSO is obliged to evaluate the laser safety risks and set up safety control mechanisms to ensure the safety of operators and prevent untrained persons from entering the laser radiation hazard area. 
• Before using the product, complete xTool's Laser Safety Awareness Training Course and review LSO Training documents, available at xTool software and support.xtool.com/article/1171 for more information on Class 4 lasers, their uses, and their potential hazards. In the workplace context, you shall also receive adequate Class 4 laser product safe operation training as set forth in ANSI Z136.1, which is on the responsibility of the employer to provide.
• Establish a laser controlled area, and use the product only within this area. You can use the remote interlock function of the USB key to establish such an area. For operational instructions, visit support.xtool.com/article/1367.
• Within the laser controlled area, the laser is hazardous when the device is powered on and the access-control key is inserted. Adequate precautions must be taken because the laser may fire at any time.
• All personnel entering the laser controlled area must wear laser safety goggles that provide shielding against laser beams at the wavelength range of 1080 ± 10 nm, with an optical density greater than 6.
• Only professionally trained personnel wearing necessary personal protective equipment (PPE) are allowed to enter the laser controlled area. You can visit support.xtool.com/article/1444 to learn about the Maximum Permissible Exposure (MPE) and Nominal Ocular Hazard Distance (NOHD) of the product, and determine the safety precautions you need to take.
• Before processing, ensure that the cable fixing block has been properly installed. Otherwise, Class 4 laser beams may leak out from the opening.
• Do not use the product in public places, or on other occasions where untrained persons or children are present.
• Do not operate the product when any part of it is removed. Removing any part may expose the laser system and cause damage to the product.
• You are advised to use xTool recommended materials and parameters for processing. You can visit easyset.xtool.com and choose your device name to see applicable materials. Exercise caution if you use a material that is not recommended. The device may produce unsatisfying results or even get damaged.
• If your skin gets burned by laser beams, disinfect the skin with a povidone-iodine solution immediately and apply burn ointment to the wound. If you are severely burned, go to a hospital and see a doctor as soon as possible.

2. Gas cylinder safety

If cylinders containing shielding gas are damage, they may explode, causing injury and property damage. Injury is also possible if a cylinder tips over.

Follow the safety precautions:

• Use gas cylinders that meet the requirements for using this product. The gas type should be nitrogen, argon, oxygen, or compressed air.
• Use gas cylinders of up-to-standard quality. Ensure that the cylinders have valid inspection certificates and clear markings. Do not use expired or obsolete cylinders.
• Before using a gas cylinder, please carefully read and strictly follow all safety and operational instructions for the cylinder. The user is responsible for determining the suitability of the cylinder and the Company shall not be liable for cylinder products or services provided by third parties.
• Place gas cylinders away from heat sources, sparks, flames, and laser beam deflection.
• Do not place gas cylinders in direct sunlight.
• Store or place gas cylinders upright and secure them with proper devices.
• Do not strike or crash gas cylinders. When transporting and storing cylinders, use proper tools for protection, such as protective caps and shockproof rings.
• Check the gas cylinders regularly for leaks and damage.
• Do not use damaged gas cylinders.
• Use a proper gas regulator to meet the flow rate and gas pressure requirements.

3. Chemical safety

A high-density laser beam is used by the product to irradiate the material to be cut or engraved, so as to heat up the material surface and vaporize the material without burning. But some materials may release toxic and harmful smoke or gases at a high temperature. Therefore, precautions are required for chemical safety during material processing.

Follow the safety precautions:

• Ensure that the working area is well-ventilated. Processing in poorly ventilated confined spaces is extremely dangerous, as the concentration of toxic fumes and gases can increase rapidly, causing unconsciousness or death from suffocation.
• Install proper exhausting and purifying equipment in the working area to absorb toxic fumes and gases and purify them before exhausting them to the outdoor environment.
• You are advised to use xTool recommended materials and parameters for processing. You can visit easyset.xtool.com and choose your device name to see applicable materials. Exercise caution if you use a material that is not recommended. The device may produce unsatisfying results or even get damaged.
• Do not process any material that contains PVC or vinyl. (Processing plastics is prohibited.) These materials (and other materials containing chlorine/chloride) can generate corrosive vapor that is extremely harmful to the human body and can cause damage to the product. Any damage caused by processing any material containing PVC or vinyl is not covered by the Company's warranty.
• Do not process any unknown materials. Vaporization or melting of many materials, which include but are not limited to PVC and polycarbonate, may release harmful smoke. 
• Exhaust emissions should comply with local laws, regulations, and standards.

4. Fire safety

A high-density laser beam is used by the product to irradiate the material to be cut, so as to heat up the material surface and vaporize the material without burning.

Follow the safety precautions:

• Ensure that the area around the product is clean and neat and that the workspace is well-ventilated so that the generated smoke can be discharged in time.
• Do not place any flammable materials, explosives, or volatile solvents, such as paper, acetone, alcohol, or gasoline, around the product. They may cause the spread of flames and increase the risk of material ignition. 
• Cutting a material near the edges of the working area may cause sparks to splash out from the bottom of the device. Keep flammable materials, explosives, and solvents away from the device. Operators must stay at least 50 cm away from the spark-splashing zone.
• Do not leave the product unattended when it is working. If the product works with setting errors and is left unattended for a long period of time, or if a mechanical or electrical fault occurs, a fire may be caused.
• Clean the product regularly. Excessive accumulation of residues and chippings from material cutting would increase the risk of fire. The internal working area needs to be cleaned periodically to ensure that there is no residue or chipping inside the product.
• Prepare a fire extinguisher and perform regular maintenance and inspection on it. The fire extinguisher should be placed nearby and accessible, and all personnel should be trained in the usage of the fire extinguisher.
• Place and use the product in locations where children are not likely to be present.

5. Electrical safety

Use of non-compliant power supplies can cause damage to the product as well as the power circuit, resulting in property damage or injury. Touching live parts directly or indirectly after the equipment has been energized can cause injury or death.

Follow the operating principles:

• xTool MetalFab CNC Cutter requires 2.5 A, 100 V – 240 V single phase AC power. As for xTool MetalFab Laser Welder, refer to its user manuals for power specifications. Ensure that the power supply meets the requirements for use of the products. 
• Do not connect xTool MetalFab Laser Welder to a domestic electric circuit. Otherwise, both the product and the domestic electric circuit may get damaged.
• Ensure that xTool MetalFab Laser Welder is properly grounded. If the circuit you are connecting to is not grounded, please use the earth cable to connect the product to the ground.
• Wiring operations should be performed by a professional electrician. Wiring shall comply with national and local regulations.
• To ensure safety, it is recommended that you install a 32 A air circuit breaker between the power supply and xTool MetalFab Laser Welder.
• Do not disassemble the product or change its structure in any way without authorization.
• Ensure that the wiring is correct and xTool MetalFab Laser Welder is properly grounded before you turn it on.
• Do not open any access panel on the product when the product is connected to the power supply. Accidental contact with the power supply may cause injury.
• Do not touch any electronic area with your hands or other tools when the product is connected to a power supply.

6. Use and maintenance

Follow the operating principles:

• The machine works properly at the temperature of 0°C to +40°C and can be stored properly at the temperature of –10°C to +60°C.
• Place and use the product on a stable, flat, and non-flammable surface. Keep the workspace clean and neat. 
• Do not disassemble the product or change its structure in any way without authorization. Do not modify or decompile its operating system.
• Check the product for damage every time before you use it. Do not operate it in any way when any damage or defect is found.
• If a consumable part of the device is damaged, follow the operational instructions to replace the part.
• Do not leave the product unattended during operation. When the product is working, pay attention to its working status and the information indicated by the indicator and the buzzer.
• Keep the laser processing area clean. Excessive accumulation of residues and chippings from material processing would increase the risk of fire. Please clean them regularly.
• Cut off the power before maintaining the product.
• This product is not user-serviceable. It must be returned to the factory or repaired by authorized professionals.
• Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.

7. Warning and instruction signs

On the product, the warning and instruction signs are labeled where physical injuries or damage to the product may be caused before and/or during operation. If a sign is damaged or lost, replace it immediately. You can use the following template to print the sign you need.

Laser specifications

Indicator and buzzer explained

Annular indicator

Buzzer