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2.5
Special product risks
2.5.1
Laser radiation risks
Based on level of potential risk of laser radiation, the national standard GB 7247.1-2001 makes classification for
them. Laser class applicable for this laser cutting machine depends on operation mode. The followings are
abstract of laser device classification prescribed by the state:
Class 1: safe laser device under reasonable and foreseeable working conditions
Class 2: laser device emitting visible light at wave length of 400nm-700nm. Generally, avoidance response
including blink reflection provides protection;
Class 3A: safe laser light visible to naked eyes. Generally, avoidance response including blink reflection provides
protection. Harm to naked eyes of other wave lengths will be less Class 1 laser device. Class 3A light beam internal
observation with optical device (e.g. glasses, telescope, microscope) may be dangerous.
Class 3B: dangerous laser device is to directly and internally see light beam. Generally, observation of diffuse
reflection is safe.
Class 4: laser device with diffuse reflection causes danger. They may possibly cause skin burn, or fire accident.
Great care is required to use this kind of laser device.
2.5.1.1 Common mode
In the normal operating mode, the laser cutting machine equals to Class 1 laser radiation. In this operating mode,
there will no harm of laser radiation to eyes and skin; however, you are recommended to wear goggles with
antiglare filter in case of long-term exposure to cutting light beam.
2.5.1.2Direct laser
You are required to pay attention to the followings while operating the laser equipment:
It is strictly prohibited to directly expose any parts of human body, explosive object and flammable objects to
direct laser;
Modification of fasteners on the optical parts is strictly prohibited;
Unauthorized change of light route is strictly prohibited;
Abide by all instructions prescribed in the operation manual.
Tips
It is a must to ensure normal operating mode;
Correct installation of all protective covers;
Keep upper cover of crossbeam closed;
Correct operation of the laser cutting machine;
Materials to be processed have been verified suitable for CO
2
laser processing
