Calca LMM-JL Series, User Manual, Page: 16 / 49

LASER MARKING MACHINE
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Class 3A: safe laser light visible to naked eyes. Generally, avoidance response including
blink reflect ion provides protect ion. 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, and 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.
2.6.2 Common mode
In the normal operating mode, the laser marking cutting machine equals to Class 4 laser
radiation. In this operating mode, there will harm of laser radiation to eyes and skin; you are
required to wear goggles with antiglare filter.
Note
◆
Common working mode must ensure:
◆
Correct operation of the laser marking machine
◆
Materials should be verified to be suitable to be processed by fiber laser.
2.6.2.1 Direct laser
You are required to pay attention to the followings while operating the laser machine:
> 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.
2.6.2.2 Reflection and diffuse radiation
Avoid exposing eyes and skin to mirror reflection and diffuse radiation. In the maintenance
mode, the maintenance personnel are required to wear laser-proof glasses, and the laser-
proof glasses should satisfy the requirements as per
EU standard EN207A1:2002
.