3D Systems sPro User Manual page 26

SLS p r o c e s s
u s e r ' s g u i d e
Laser Service and Maintenance
WARNING! SLS system laser service
and maintenance procedures must
only be performed by 3D Systems-
certified service technicians.
Attempts by non-3D Systems-
certified personnel to perform laser
service or maintenance procedures
could result in serious injury. All SLS
system users must observe the
guidelines and warnings in the "Laser
Safety" section of this guide.
The SLS system conforms to applicable
requirements of 21 CFR Subchapter J at date of
manufacture. It is designated a Class 1 Laser
Device by the Center for Devices and Radiological
Health (CDRH). In normal operation, the laser
beam is completely confined and the viewing
windows in the process chamber block infrared
radiation. However, if the laser cover is removed
for any reason, the unit becomes a dangerous
Class IV laser device. Direct or reflected laser
power from a Class IV laser device can cause
severe burns and eye damage. It can also be a fire
hazard. See Laser Safety
information.
2 6
on page 20 for more
Laser Service Guidelines
On occasion, certified service personnel
perform alignment or focus adjustments on the
SLS laser or beam delivery system. When this
occurs, certified service personnel at your site
should follow the special laser safety precautions
described in the following list:
Certified service personnel should secure the
room containing the SLS system; it is called the
Nominal Hazard Zone (NHZ). The room must
have locks on the door(s) that limit entry but
do not restrict exit. If the SLS system is in an
area that cannot be secured by door locks,
your company must provide laser safety
curtains or alternative safety precautions.
Certified service personnel should post
Exposed Non-Visible Laser in Operation signs at
each entrance to the room containing the
SLS system.
S A F E T Y
l a s e r s a f e t y
must