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4.2 Maintenance

Cleaning Optical Lens

Because of the working environment, the optical lens may have been polluted after

being used for a period of time. If it is not maintained regularly, the dust will corrode the

lens with coating. The lens that is damaged by coating cannot reflect light and let the

light go through the laser. It will instead absorb laser heat, affecting the effect of marking

and causing the lens to crack easier. When cleaning the lens, use lens paper or absorbent

cotton with medical alcohol rotary cleaning along the central to the brink of the lens.

Note! Do not use a coarse material wipe or touch the lenses with your hands.

Warm Tips：

1.Lens should be wiped gently. Do not damage the surface coating.

2.The wiping process should be gentle to prevent the decline.

3.While wiping the lens, do not wipe it back and forth or brush it with rough materials as

the lens is consisted with a metal film, which will lead to a damage of laser energy

attenuation.

4.Absorbent cotton wipe can be used once only. Check after cleaning. Do not leave cotton

thread or other residues after wiping. Wait until the alcohol completely volatiles before

starting the machine up.

FM30 / FM50 User Manual