xTool F1 LSO Training

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xTool Customer Service
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Safe operation of your F1 requires a trained Laser Safety Officer (LSO). xTool has consulted with laser experts to design these F1 LSO Training Materials to help you in complying with your LSO responsibilities and ensure that you operate your F1 safely.
The first document, the F1 LSO training, has three parts:
● The first section, "F1 Safe Operation", describes the procedures to ensure safe operation.
● The second section, "Laser Safety Officer Responsibilities", describes your role as the Laser Safety Officer for your F1.
● The third section, "About Lasers and Laser Safety", describes general information about lasers and laser safety as well as regulations pertaining to lasers.
The second document, "F1 Laser Safety Program", is a laser safety program document that you, as the LSO for your F1, may adopt.
The third document, "F1 Laser Standard Operating Procedure", is an SOP document that you may adopt that is a part of the F1 Laser Safety Program.
The fourth document, "Warning Sign", is a sign you may choose to use as a compliance measure described in the SOP if you decide not to operate your F1 in Class 1 conditions.


F1 Safe Operation

Class 1 Conditions
Your F1 is a Class 4 laser. However, certain safety precautions may create "Class 1 conditions" around the laser. Class 1 conditions mean that the conditions are incapable of producing damaging radiation levels during normal operation. This means that if you choose to completely cover the processing area with a protective enclosure, you do not need additional protective measures, such as safety glasses, signs, and warning lights.
However, even with Class 1 conditions, every person who uses the F1 must read and abide by the user manual and all instructions in the XCS.

Protective enclosure

Your F1 will provide a protective enclosure. When using the protective enclosure of F1 and following all the instructions in the manual and XCS, there is a level 1 condition. In addition to following the manual and XCS application, there is no need for further laser safety precautions. The laser operator must prevent children and untrained users from accessing F1.

Operation Outside of Class 1 Conditions

If your F1 is not being operated under Class 1 conditions, you are responsible for ensuring safe operation. The provided SOP does not permit safe operation in Class 4 conditions, so the LSO must create an SOP that does. Ultimately, the LSO is responsible for defining what that entails and describing and enforcing it with that SOP, and the laser operator is responsible for ensuring compliance and safe operation. Some key elements of a Class 4 SOP may include:

Appropriate safety glasses

XTOOL sells safety eyes, which are suitable for use with your F1 under level 4 conditions. Contact https://www.xtool.com/ Learn more on the official website. The hazard analysis (below) shows that the glasses provided by XTOOL are suitable for use.


An appropriate laser safety sign is placed at the entryway to alert people to the hazards inside. F1 has provided a sample sign (below).


When F1 is powered on, an indicator light will be on. When the indicator light flashes, it indicates that the laser is in use.

Protective enclosure opening stop

When the protective enclosure is opened, the laser will stop automatically.


F1 is equipped with a key, and F1 can only be used if the key is authorized.

Emergency stop switch

F1 is equipped with an emergency stop switch. When the emergency stop switch is pressed, the laser will stop.

Laser Safety Officer Responsibilities

The LSO and Your Laser Safety Program

ANSI Z136.1 describes guidelines for a safety program that will minimize the hazards of a Class 4 laser like the F1. Primary safety responsibility rests with someone designated as the Laser Safety Officer, or LSO. This document is designed to assist you in acting as the LSO for one or more F1 units. It does not provide sufficient information to advise you on acting as the LSO for any other laser.
The LSO verifies the classification of the laser. The LSO determines the level of hazard by considering the details of the laser and creates a standard operating procedure (SOP) that determines what control measures (like additional interlocks, training, and safety glasses) should be used.
The LSO is then responsible for helping and training other laser users, ensuring safe compliance, analyzing any possible hazards, providing safety equipment, ensuring all regulations are complied with including (in the US) CDRH, OSHA, and state regulations, and auditing the use of the laser to make sure it’s used safely.
Beyond these responsibilities, the LSO must also recommend and approve signs, labels, protective equipment, facilities, equipment, and any modifications, maintain records, approve laser system operation, and investigate accidents should one occur. The LSO is ultimately the one responsible for determining if and how a laser may be safely operated.

Hazard Analysis

The LSO must analyze the hazards present in the lasers for which they are responsible. The LSO may rely on an expert for the execution of hazard analysis. XTOOL created a hazard analysis (provided below) of the F1 that you may choose to use in your laser safety program.

Standard Operating Procedure

Based on Hazard Analysis, the LSO must create a Standard Operating Procedure (SOP) that describes the control measures required to minimize hazards. XTOOL has also created a sample SOP (provided below) that you may use or adapt to your F1 laser safety program.

About Lasers and Laser Safety

How Lasers are Different

Lasers are a special kind of light source. Most light is made of many different colors, all shining out in lots of directions at once. Laser light is different in three ways.
First, laser light is monochromatic - just one color. Sometimes that color is visible, like the low-power red laser that you can see your F1 use to measure material when it’s focusing. Sometimes it’s invisible, like the high-power infrared laser beam your F1 uses to cut and engrave material.
In technical discussions, people describe lasers as producing "nonionizing electromagnetic radiation". That describes a broad category that includes everything from sunshine to radio waves. Instead of talking about color, they use the term "wavelength".The printing laser wavelength on F1 is 455 nm blue-light laser and 1064 nm infrared laser.
The second difference between laser light and regular light is that laser light is directional. That means that it can be made to travel in a straight line, in a beam, without spreading out much.
The third difference is that laser light is coherent. That means that each lightwave is synchronized with the others.
It’s very hard to get light to move in a straight line, without spreading out. If the waves aren't lined up, or if there’s a mix of colors and directions, the beam will spread out. Lasers, however, can stay lined up for a long distance - and, importantly, can be focused down to a point.
Lasers' greatest effectiveness and danger, as compared to ordinary light, comes from lasers' ability to be focused.

Laser Background

The very first laser used a strobe light and a ruby crystal. The light from the strobe was amplified in the ruby crystal, stimulating it to emit nonionizing electromagnetic radiation at 694 nanometers. The acronym“LASER” comes from this experiment - light amplification through stimulated emission of radiation.
These first lasers were called "solid-state" lasers because the action parts were solid crystals. Shortly after the development of solid-state lasers came gas lasers, which can resemble neon signs. Electricity causes gas in a tube to glow. Specially tuned mirrors amplify the light, and the laser beam emerges.
One of the most recent lasers to be invented is the diode laser. Diode lasers are small electrical devices that are made of microchips and LEDs. They turn power directly into laser light. You may have seen one before on a laser pointer.


There are four measurements used to describe the effect of a laser.
Joules measure energy. If you shine a light on a gram of water until it absorbs 1 joule of energy, the water will heat by about a quarter of a degree Celsius.
Watts measures power. If you turn on a one-watt light for a second, it will put out 1 joule during that time.
Joules per square centimeter measures radiant exposure. If you focus down that one-watt light to a square centimeter of paper and shine it for a second, that one joule will spread over the paper, and it will heat up slightly, just like the water. However, if you focus it down to 1/100th in size, the paper may singe and turn brown.
Finally, watts per square centimeter measure irradiance. If you keep shining that one-watt light on the paper, it will keep adding joules of energy. If it's focused on one square centimeter, it will slowly warm. If it’s focused to 1/100th the size, the paper may catch fire.

Laser Beam Hazards

Laser beams can be hazardous because the energy of the laser can damage the eyes and skin. (If the infrared laser and blue-light laser in F1 irradiate the tissue, it will heat the tissue.)This can cause damage to both eyes and skin. The risk is higher if the laser is more powerful if it is more focused, and if it stays in one place for a longer time, so all of these factors are considered when assessing safety.
The laser beam can strike a person in one of three ways. First, the laser can be pointed at the person directly. Second, in specular reflection’, the laser can be reflected toward a person. Third, in diffuse reflection, the laser strikes a surface that is not a mirror and scatters the light in all directions. Because the light from a diffuse reflection is scattered, it is not as hazardous as direct or reflected light, but there may still be enough intensity to cause damage.

Laser Hazard Classes

Lasers are classified by the level of radiation that may be encountered during normal operation.
Class 1 lasers are incapable of causing injury during normal operation. Class 1M lasers are the same, except unless magnifying optics are used. (The red measurement laser and blue measurement laser in F1 are Class 1 lasers).
Class 2 lasers are incapable of causing injury in less than 0.25 seconds. Class 2M lasers are the same, except unless magnifying optics are used.
Class 3R lasers are marginally unsafe if the beam is directed at the eye. Class 3B lasers are hazardous if the beam is directed at the eye, but are usually not an eye hazard if the beam is scattered.
Class 4 lasers are eye and skin hazards for both direct and scattered exposure. (The infrared printing laser and blue-light printing laser in F1 are Class 4 lasers).

Laser Regulations

In the US, laser manufacturers like XTOOL are regulated by the Center for Devices and Radiological Health (CDRH) and are required to follow 21 CFR 1040.10 and 1040.11, which are federal laws. In many other countries (but not the US), both laser manufacturers and laser users are required to follow IEC60825.
ANSI Z136.1 is a voluntary standard that describes how to use lasers safely. OSHA (a US federal law that applies to workplaces but not to private homes) requires a safety program like that described in the ANSI standard.
The CDRH requires that Class 4 laser devices have a defined set of safety features. The case of the F1 prevents access to excess laser radiation and serves as the protective housing. Safety interlocks disable the laser if the lid is opened. You will have a physical key as the master key control of F1, which can prevent unauthorized laser operation.
There may be other laser regulations depending on your country, state, and even city, and regulations may change. This information is provided to assist you in creating a safety program as described by ANSI Z126.1, but can not advise you on legal compliance.

Non-Beam Hazards

There are additional hazards to your F1. Always operate your F1 using the manual and follow all instructions in the XCS to minimize hazards.

Laser GeneratedAir Contaminants

When using a laser to process materials, a variety of air contaminants may be produced that can be hazardous. The air must be filtered to remove those contaminants. Follow the user manual in your F1 to ensure that all exhaust is either properly treated or discharged outdoors where it can safely dissipate.

Process Nonionizing Radiation

Processing metals with a laser may result in the release of ultraviolet light. If your F1 produces a bright light that cannot be viewed comfortably, look away.

Collateral Nonionizing Radiation

The material that produces the laser beam may emit harmful levels of UV and/or IR light. The F1 has been tested to ensure that harmful levels are not present outside the case or when viewed through the glass lid.

F1 Laser Safety Program


This program applies to F1 Laser operated by F1 Owner. This program is based on the guidance of ANSI Z136.1-2014, the American National Standard for Safe Use of Lasers. The proper implementation of this program will assure that laser exposures are always below the maximum permissible exposure (MPE) limits.


An individual designated as the Laser Safety Officer (LSO) shall have the responsibility and authority to assure compliance with this program. The LSO shall:
  • Provide hazard evaluations for F1 laser
  • Specify control measures for the F1 laser and assure implementation
  • Approve procedures, SOPs, protective equipment, signs, and labels
  • Assure that all laser personnel receive appropriate safety training
  • Monitor the program and assure compliance
  • Maintain program records
The LSO shall have final authority in determining F1 laser control measures and may approve alternate controls when these are appropriate based on the judgment of the LSO. F1 laser shall be operated only with the approval of the LSO. The LSO shall have the authority to terminate laser operations at any time.


Class 1 laser systems are incapable of producing damaging radiation levels during normal operation and are exempt from any control measures. Class 1 laser systems may contain higher class lasers and may produce laser hazards if operated with interlocks defeated. Only authorized personnel may operate class 1 laser systems with interlocks defeated. Operators of class 1 laser systems with embedded class 3B or class 4 lasers shall receive a laser safety briefing.
Class 1M laser systems are incapable of producing hazardous exposure conditions during normal operation unless the beam is viewed with optical instruments. Operators of Class 1M laser systems shall receive a laser safety briefing.
Class 2 laser systems emit visible light only at a power level of 1 milliwatt or less. The normal aversion response to bright light is adequate protection. Staring into the beam of a class 2 laser is hazardous. Operators of class 2 laser systems shall receive a laser safety briefing.
Class 2M laser systems emit visible light only. The normal aversion response to bright light is adequate protection for unaided viewing. However, viewing the beam with optical aids is potentially hazardous. Operators of Class 2M laser systems shall receive a laser safety briefing.
Class 3R laser systems are potentially hazardous under some viewing conditions, but the probability of an actual injury is small, and the control measures for safe use are straightforward. Most laser pointers fall in this class. Operators of class 3R laser systems shall receive a laser safety briefing. (Most lasers previously classified as class 3a fall in this category.)
Class 3B laser systems are eye hazards for intrabeam viewing and specular reflections, even for momentary exposures, but diffuse reflections are not usually hazardous. Class 3B laser systems shall be operated only in laser-controlled areas by authorized operators. Operators of class 3B laser systems shall receive approved laser safety training.
Class 4 laser systems are eye hazards and skin hazards for intrabeam exposures, specular reflections, and diffuse reflections. They are also fire hazards and may produce laser-generated air contaminants. Class 4 laser systems shall be operated only in laser-controlled areas by authorized operators. Operators of class 4 laser systems shall receive approved laser safety training. Written Standard Operating Procedures (SOP) are required for class 4 laser operation. The F1 Laser is certified by the FDA under the Code of Federal Regulations Title 21 as a class 4 laser system.


When operating in Class 1 conditions, all users will read and obey the safety manual and XCS software. When operating in Class 4 conditions, additional laser safety training is required and must be prepared and administered by the LSO. If there are bystanders or children, or if F1 Laser is used in a public place where there may be untrained personnel, a light shield must be used.


The requirements for the F1 Laser-controlled area shall be determined by the LSO. The minimum requirements considered by the LSO for the F1 Laser controlled area are:
  • If needed entryway controls to allow only authorized personnel or approved spectators to enter the F1 Laser control area. (Administrative controls are acceptable.)
  • Laser safety eyewear available and used by the SOP for the F1 Laser.
  • Beam control (barriers and beam blocks) to limit laser hazards within the controlled area.
  • Written SOP for the F1 Laser.
  • Training of the F1 Laser operators.


Laser safety eyewear is not normally required for the operation of the F1 Laser when operating in Class 1 conditions as described in the SOP. The LSO will require eyewear or approve laser operation without eyewear based on a hazard evaluation performed by the LSO or the LSO may choose to delegate this responsibility.


Employees who work with the F1 Laser with the beam exposed shall energize or work with lasers only when authorized to do so.
  • Comply with laser safety rules and work procedures.
  • Notify their supervisor or the LSO in case of potential accident or injury or suspected unsafe condition.



At an interval determined by the Laser Safety Officer, the F1 Laser will be audited for safety:
1) It will be visually inspected for damage.
2) The most recent user version of the manual will be re-read.
3) The laser will be energized and the lid opened to confirm that the interlocks correctly interrupt operation.
4) The Laser Safety Program will be reviewed to ensure that the program is current and compliant.
A record of this audit will be completed, printed, signed, dated, and retained.


The LSO shall maintain records that document the Laser Safety Program. These records shall include:
  • Laser hazard analysis reports for the F1 Laser
  • A list of operators who have been trained and permitted to use the F1 Laser
  • Standard Operating Procedures for the F1 Laser
  • Approvals of alternate laser control measures, if implemented
  • Laser Safety Audit checklist

F1 Laser Standard Operating Procedure (SOP)

Scope: This SOP applies to the normal operation of the F1 Laser as specified by the manufacturer.
  1. System Description: Double light source semiconductor laser material processing system. This is a Class 4 laser system that normally operates under Class 1 conditions (ANSI Z136.1,

Wavelength: 455 nm / 1064 nm
Maximum Power: 10 W
  1. Potential Hazards
A. Eye hazard from the direct, reflected, or scattered beam.
B. Skin hazard and fire hazard.
C. Electrical hazard inside the power supply.
D. Laser Generated Air Contaminants.
  1. Control Measures
A. The LSO will only allow physical access to the laser to users who have been enrolled in the XCS software and thereby receive safe operating instructions.
B. All users of the F1 Laser will comply with the user manual and all instructions in the XCS software at all times. the
C.The F1 Laser shall be operated in class 1 conditions per ANSI Z136.1, (reference Hazard Analysis Report). Class 1 conditions shall be considered fulfilled when operating under the following guidelines.
a.The laser system shall be operated with all manufacturer safety features fully functional.
b.When the base plate is not removed for use, the light shield shall be used.
D. Do not operate F1 with bystanders and children, or in public places where the protective enclosure is not used safely. You can take away the key to ensure that your F1 will not be used by others.
E. Keep all combustibles, tools, and reflective surfaces away from the beam path. Make sure you know where the beam is and stay clear.
F. Work involving access to the power supply shall be done by the manufacturer with no exceptions.
G. Maintenance shall be done with the laser system turned off.
  1. Required Training: When operating in Class 1 conditions, all users will read and obey the safety manual and XCS software. When operating in Class 4 conditions, additional laser safety training is required and must be prepared and administered by the LSO.
  2. For emergency medical response call ____. Report all incidents to the LSO.
  3. Authorized Personnel
The following personnel are authorized to operate this system:
By checking the box or reading this LSO document, we will consider you to be qualified or authorized.

Warning Sign

This training document is based on existing searchable documents, including but not limited to 21 CFR Part 1040.10, 1040.11, ANSI Z136.1 Standard - Guidance for Implementing a Safe Laser Program, OSHA, the U.S. Occupational Safety and Health Alliance, the U.S. Laser Protocol: the Laser Regulators and the Center for Devices and Radiological Health, and other publicly available documents and standards issued by the above agencies at the time of this document's development. The documents and standards issued by these organizations and available in the public domain have been prepared, and the courses and presentations of some laser safety experts in the public domain have also been taken into account. The final right of interpretation of this document belongs to XTOOL.

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