Engineer Training

UV Lamp Head

TJ8300 / TJ8500

UV Lamp Head

Confidential 2

Engineer Training

UV Lamp Head

TJ8300 / TJ8500General

Confidential 3

Engineer Training

UV Lamp Head

TJ8300 / TJ8500General (Cont.)

WaterCooled Extrusion

Shutter

UV Lamp

IR AbsorbingDichroic Reflector

Housing

Confidential 4

Engineer Training

UV Lamp Head

TJ8300 / TJ8500General (Cont.)

Confidential 5

Engineer Training

UV Lamp Head

TJ8300 / TJ8500Components

The UV lamp head includes:

Ultra violet (UV) lamp

Shutters

Reflectors

Quartz plate filter

Air extraction windows

Water tubes and ducts

Confidential 6

Engineer Training

UV Lamp Head

TJ8300 / TJ8500UV Lamp

UV Lamp

Confidential 7

Engineer Training

UV Lamp Head

TJ8300 / TJ8500UV Lamp (Cont.)

The lamp is the heart of the UV system.

Lamp power is up to 200 W/cm (36kW).

The lamp, by nature, cannot be switched On or Off instantly.

When the machine is in Idle mode:

The lamp switches to the reduced power level of 30%.

The shutters are closed.

Lamp’s operating temperature is 650°C - 850°C.

Confidential 8

Engineer Training

UV Lamp Head

TJ8300 / TJ8500Shutters

Shutters are closed when the machine is not printing.

Shutters are automatically activated when the machine startsto print.

Shutters are operated pneumatically.

Confidential 9

Engineer Training

UV Lamp Head

TJ8300 / TJ8500Shutters (Cont.)

Shutters open Shutters closed

Confidential 10

Engineer Training

UV Lamp Head

TJ8300 / TJ8500Reflectors

Upper Shutter

The Reflectors

Confidential 11

Engineer Training

UV Lamp Head

TJ8300 / TJ8500Reflectors (Cont.)

The reflectors are manufactured from pure aluminum, anodized for protection and treated to give maximum UV reflectivity.

The reflectors absorb heat and reflect UV.

The reflectors minimize the IR power and maximize the UV power.

Confidential 12

Engineer Training

UV Lamp Head

TJ8300 / TJ8500Reflectors (Cont.)

Min IRMax UV

Absorb heatandreflect UV

Upper Shutter

Confidential 13

Engineer Training

UV Lamp Head

TJ8300 / TJ8500Reflectors (Cont.)

IR Power

UV Power

Confidential 14

Engineer Training

UV Lamp Head

TJ8300 / TJ8500Quartz Plate Filter

The purpose of the quartz plate filter is to:

Prevent the media from touching the reflectors and the UV lamp.

Prevent ink fumes from entering the lamp head.

Quartz Plate Filter

Confidential 15

Engineer Training

UV Lamp Head

TJ8300 / TJ8500Air Extraction Windows

The purpose of the air extraction windows is to:

Allow the lamp head to cool down by extracting the heat fromits vicinity.

Remove the small quantities of ozone that are generated around the lamp.

Air Extraction Windows

Air Extraction Windows

Confidential 16

Engineer Training

UV Lamp Head

TJ8300 / TJ8500Water Tubes and Ducts

The purpose of the water is to cool down the UV lamp head.

The ducts are located around the UV lamp head.