Part 3

Overall Sound Pressure Level (OASPL)

The sound of the NextDent system will not exceed 80 db.

Air Cleanness

The room housing the NextDent system should be prepared for odors related to a small material spill. The means that windows should be able to be opened and/or other measures can be put in place to vent the room in the case of a spill. Reasonable care should be taken to minimize dust and smoke which could contaminate the NextDent material and cause deterioration of optical surfaces. Avoid temperature fluctuation. Since dust, smoke and temperature fluctuations can affect the performance of the machine and the quality of the parts, an area with filtered air flow is recommended. Avoid proximity to machine shop areas, or where milling, grinding, or sanding is performed.

Lighting

Standard fluorescent lamps with clear plastic diffusers are recommended to minimize ultraviolet exposure, which could negatively affect the NextDent material. Sunlight, quartz-halogen lamps, and high-intensity incandescent lamps are not suitable; and UV-intensive lighting or ultraviolet exposure through windows should be avoided. UV filters are available for windows and exposed fluorescent lamps. Any exposure of the resin to any of the light sources described in this section is likely to cure the resin, thereby wasting it and forcing a difficult cleanup.

Door or Other Method of Preventing Access to Room

The site should be able to be isolated from other employees or personnel in the event of a material spill or major machine malfunction. A separate room or area that can be closed to others is necessary. The system is safe and does not present hazards to properly trained personnel operating the system in accordance with our specifications. However, the system should be installed in an area that can be cleared of untrained personnel during emergency situations.

Network Access

The NextDent system controller computer includes a Class A Ethernet interface, which can be connected to a 10/100/1000 MBit/s Ethernet network to offer network access to the NextDent system. To remotely operate the NextDent 5100 Printer or to remotely run service engineer diagnostics, a VPN network access is required.

Telephone Service

Dedicated telephone lines are not required for normal operation of an NextDent system. You may wish to install a dedicated telephone line in the NextDent system installation area to facilitate discussions with 3D Systems Customer Service personnel while the machine is in operation, should the need arise.