EPT058613 Issue 1 March 2020 13
MATERIALS
All guard materials must be opaque to 1030 to 1200 nanometers and to 630 to 670
nanometers wavelength laser light, produced by the fibre laser or pilot laser. Guards may be
metallic and non-reflecting, however if a see-through guard is required a material opaque
1030 to 1200 nanometers wavelength laser light must be used.
See through guards must be special laser safety windows.
Always use non-reflecting materials.
The thickness of the guard material depends on the mechanical strength required, and the
amount of ‘burn through’ anticipated. For the purpose of adequate mechanical rigidity, a
thickness of at least two millimetres, and preferably three millimetres of steel plate is
recommended. To ensure laser safety a greater thickness of the guard material may be
required.
In a fault condition, these materials withstand the laser beam for a limited time before the
beam burns through. The laser must therefore be monitored to avoid a risk of fire.
A ceramic or metal plate may be used as a beam stop. A greater thickness is required to
achieve the “eight hour burn through” requirement.
Guidance regarding laser guards can be found in EN60825-Part 4.
BEAM DELIVERY CABLE (FIBRE)
Should the beam delivery cable break, there is potential for it to no longer be Class 1. There
is no cable break or fibre break detection offered on this product. The integrator must either
include the beam delivery cable inside the Class 1 enclosure with the Pulsed Laser Aperture
or undertake suitable measures to ensure that under reasonable use, the cable is suitably
positioned to prevent it from becoming damaged or mishandled.
The beam delivery cable has not been designed for robotic applications. The Laser must
not be designed into systems where the Beam Delivery Cable will be subject to high levels
of acceleration, torsion and twist, or combination thereof. If this is a requirement for the
integration, please contact Domino to discuss the application in more detail.
The minimum bend radius (r) for the fibre is 75mm.
To Next Page
Loading...