TJ 8300 TJ 8500 Engineer Training UV Lamp

TJ 8300 / TJ 8500 Engineer Training UV Lamp Head

TJ 8300 / TJ 8500 Engineer Training Confidential General UV Lamp Head 2

TJ 8300 / TJ 8500 Engineer Training General (Cont. ) UV Lamp Water Cooled Extrusion Housing Shutter Confidential IR Absorbing Dichroic Reflector UV Lamp Head 3

TJ 8300 / TJ 8500 Engineer Training Confidential General (Cont. ) UV Lamp Head 4

TJ 8300 / TJ 8500 Engineer Training Components The UV lamp head includes: q Ultra violet (UV) lamp q Shutters q Reflectors q Quartz plate filter q Air extraction windows q Water tubes and ducts Confidential UV Lamp Head 5

TJ 8300 / TJ 8500 Engineer Training UV Lamp Confidential UV Lamp Head 6

TJ 8300 / TJ 8500 Engineer Training UV Lamp (Cont. ) q The lamp is the heart of the UV system. q Lamp power is up to 200 W/cm (36 k. W). q The lamp, by nature, cannot be switched On or Off instantly. q When the machine is in Idle mode: § The lamp switches to the reduced power level of 30%. § The shutters are closed. q Lamp’s operating temperature is 650°C - 850°C. Confidential UV Lamp Head 7

TJ 8300 / TJ 8500 Engineer Training Shutters q Shutters are closed when the machine is not printing. q Shutters are automatically activated when the machine starts to print. q Shutters are operated pneumatically. Confidential UV Lamp Head 8

TJ 8300 / TJ 8500 Engineer Training Shutters (Cont. ) Shutters closed Shutters open Confidential UV Lamp Head 9

TJ 8300 / TJ 8500 Engineer Training Reflectors The Reflectors Upper Shutter Confidential UV Lamp Head 10

TJ 8300 / TJ 8500 Engineer Training Reflectors (Cont. ) q The reflectors are manufactured from pure aluminum, anodized for protection and treated to give maximum UV reflectivity. q The reflectors absorb heat and reflect UV. q The reflectors minimize the IR power and maximize the UV power. Confidential UV Lamp Head 11

TJ 8300 / TJ 8500 Reflectors (Cont. ) Engineer Training Absorb heat and reflect UV Min IR Max UV Confidential Upper Shutter UV Lamp Head 12

TJ 8300 / TJ 8500 Engineer Training Reflectors (Cont. ) IR Power UV Power Confidential UV Lamp Head 13

TJ 8300 / TJ 8500 Engineer Training Quartz Plate Filter The purpose of the quartz plate filter is to: q Prevent the media from touching the reflectors and the UV lamp. q Prevent ink fumes from entering the lamp head. Quartz Plate Filter Confidential UV Lamp Head 14

TJ 8300 / TJ 8500 Engineer Training Air Extraction Windows The purpose of the air extraction windows is to: q Allow the lamp head to cool down by extracting the heat from its vicinity. q Remove the small quantities of ozone that are generated around the lamp. Air Extraction Windows Confidential UV Lamp Head 15

TJ 8300 / TJ 8500 Engineer Training Water Tubes and Ducts q The purpose of the water is to cool down the UV lamp head. q The ducts are located around the UV lamp head. Confidential UV Lamp Head 16