Changing Out UV Lamps

You must change the UV lamps after the Lamp-Time Indicator reaches 1,000 hours. To ensure uniform curing at all times, you must replace all UV lamps at the same time.

Lamp-Time Indicator - shows elapsed light time in hour increments. In this example, it shows 26.3 hours.

Lamp Change Procedure

Procedure Warnings

HOT SURFACE HAZARD: LAMPS CAN CAUSE BURN INJURY IF REMOVED WHILE STILL HOT.

CAUTION: WEAR A DUST MASK, NITRILE GLOVES AND SAFETY GLASSES WHEN CHANGING LAMPS. A BROKEN LAMP MAY RESULT IN EXPOSURE TO PHOSPHOR POWDER DUST AND TO ELEMENTAL MERCURY VAPOR. THE PHOSPHOR CONTAINS THALLIUM, WHICH CAN BE ABSORBED THROUGH THE SKIN OR INHALED.

CAUTION: Usage of lamps other than those recommended by 3D Systems, the type of lamps that came with the curing unit, will void the IEC 62417 classification of "Exempt Risk Group."

UV lamps must be installed in a specific orientation in the UV Curing Unit 350. The unit uses eight 370 nm UV Lamps (model - TL-K 40W/10R) and eight 420 nm UV Lamps (model - FR20T12/03HO). Use the following diagram to assist in your installation:

Power down the machine and unplug it. Open the lid. If changing lamps right after a curing session, ensure that sufficient time has passed to allow lamps to cool off. Ensure there is NO print platform or shelving unit currently installed in the machine. Having either of these present risks breaking the lamp inside the unit, which is very hard to clean up. Please see the section Broken Fluorescent Lamps for more information.
Using work gloves or nitrile gloves, push in on the top of the bulb until you feel it come out of its bracket. Pull the lamp up and out, careful not to hit the lamp on the sides of the machine.
Ensure you are installing the correct lamp, according to the diagram above. With the replacement lamp: line up the bottom of the lamp inside the bottom fixture in the orientation shown. Also ensure that you are installing the lamp with the reflecting side facing the outside of the machine and the translucent side facing the inside of the machine.
	Looking at floor of machine
Push down lightly on the top of the UV lamp until it can fit under the top fixture, and snap it into place. Repeat this process for each lamp in the machine.
Once you have replaced all the lamps, press the reset button on the Lamp-Time Indicator. Do not forget this step, as the light hours will guide you in when to perform your next lamp replacement.