Raycus RFL-C Series User Manual page 18

 Ensure that there are no fiber bends in radius less than
30cm when the product is installed. Avoid excessive
twisting and tight bends during the robotic arm movements.
 Tight bends will damage the laser delivery system.
 Before the laser output cable is assembled, the lens and
the cutting head cavity must be clean and free of pollution.
 Keep the protective cap properly, prevent it
from contamination; or the aperture will be contaminated
when capped.
Wuhan Raycus Fiber Laser Technologies Co., Ltd
User Guide of Global Version 2000 W CW laser
Raycus User Guide | Installation
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