The Figure 4 UV Curing Unit 350 has two safety switches, located behind the lid assembly on the left and right. The hinges on the lid engage these sensors when the lid is fully closed. If this lid is opened at any time during UV operation, the UV lights will shut off. Closing the lid back resets the machine's timer and the operator must adjust the curing time accordingly.

Since printed parts are not fully cured until after spending the appropriate time in post-curing, you must follow all the same resin guidelines as if handling resin directly. Before post-curing, parts go by the term green.

NOTE: For complete safety information and instructions for use, please read the SDS and User Guide for the Figure 4 resin you are using. These documents are packaged in with each bottle of resin.

HARMFUL IRRITANT WARNING: Always wear chemical-resistant gloves, goggles and protective clothing when handling RESIN/green parts. Avoid skin contact. Avoid breathing RESIN fumes.

• Always practice standard lab hygiene and follow Personal Protective Equipment (PPE) requirements outlined in this manual.
• Always wear chemical-resistant gloves, such as nitrile, when working near green parts. It is recommended to wear approved goggles and protective clothing. Protective clothing includes, but is not limited to: closed-toed shoes, full-length pants, and splash-resistant lab coats (long-sleeved) or equivalents. 3D Systems recommends using 100% nitrile gloves; however, other chemical-resistant gloves will suffice. Do NOT use latex gloves, as they do not provide complete chemical protection.
• Wearing contact lenses when working with green parts is not recommended.
• Avoid breathing in vapors from curing parts. To avoid breathing in vapors: when opening the lid, allow a few seconds to pass before putting your face near the opening. Your facility may require that UV Curing Unit 350 vapors be vented to outside air. Providing an interface for such ventilation from the machine is the sole responsibility of the customer.
• Always wash skin thoroughly with a nonabrasive soap and COLD water after working with green parts. DO NOT USE HOT WATER OR SOLVENTS to wash hands, as these will stimulate your pores and result in absorption through the skin. Uncured resin is sensitizing and can cause bad allergic reactions if absorbed through the skin. A person who becomes sensitized to resin should not work around that material in the future.
• If a small amount of resin gets on your clothing, remove the article of clothing as soon as possible (it might be a good idea to have a change of clothes on hand just in case). Have contaminated clothing dry cleaned. DO NOT wash in a regular washing machine that drains into wastewater. If a particularly large amount of resin gets on your clothes, it is best to discard them according to all local, state, and federal regulations. Keep contaminated clothing away from food and drinks. Wash hands thoroughly after handling contaminated clothes, even if you wore protective clothing/gloves to handle them.
• Keep all green parts away from heat, sparks, static discharge, and flame.
• Fire fighters should use a self-contained breathing apparatus and full protective clothing in the event of a resin fire.
• Do not leave green parts in an area where persons who are not knowledgeable about their handling or use may have access to them.
• Keep green parts away from food and drinks.

WARNING: USE FIRE EXTINGUISHERS SUCH AS CARBON DIOXIDE, DRY CHEMICAL, OR FOAM. A SPRAY OF WATER MIGHT ALSO BE EFFECTIVE. DO NOT USE A DIRECT JET OF WATER OR SMOTHERING TO EXTINGUISH BURNING RESIN OR SOLVENTS.

Resin Characteristics

The photopolymers used in the resins may be hazardous if handled improperly. Repeated skin contact with resins may cause sensitization. Consult the manufacturer’s Safety Data Sheet (SDS) for information on specific resins. For further information on this and related topics, consult the 3D Systems Materials website.

Resin Disposal

Dispose of green parts according to the guidelines given in the SDS included with the resin and according to all government regulations.

Contamination

Care should be taken when cleaning panels and other parts of the UV Curing Unit 350. The unit is likely to have uncured resin on it, which requires special cleaning instructions. Please see the section Preventative Maintenance for more information.

Facilities using ultraviolet (UV) equipment should use the following personal protective equipment (PPE):

UV EYE PROTECTION: Use appropriately rated uv safety glasses, goggles, or face shields.

Wear Protective clothing: this includes long sleeves, pants, and 100% nitrile gloves.

WARNING: ULTRAVIOLET RADIATION IS HARMFUL TO EYES AND SKIN. NEVER LOOK AT LIGHT PRODUCED BY THIS DEVICE. UNPLUG UNIT BEFORE SERVICING.

The following are environmental issues concerning the Figure 4 UV Curing Unit 350:

Pollution Degree

The pollution degree of the intended environment for this equipment is PD2 (Pollution Degree 2).

Temperature

To allow optimum systems operation and optimum part quality, the temperature of the Figure 4 UV Curing Unit 350 location should remain stable. The working range is 18-28°C (64-82°F). Any temperature fluctuation greater than 3°C may adversely affect parts cured in the system. The air conditioning system should maintain a temperature change of less than 1°C per hour. The unit's room should have a minimum cooling capacity of 1.4 kW. We recommend an HVAC system that changes the air six times per hour. To avoid adversely affecting part quality, do not expose the Figure 4 UV Curing Unit 350 to direct air flow from the air conditioning system.

There are no special requirements for controlling waste heat on the Figure 4 UV Curing Unit 350.

Humidity and Altitude

The optimal humidity in the Figure 4 UV Curing Unit 350 lab will depend to a certain degree on the resin selection. Regardless, the humidity should always be non-condensing and should not vary outside the range of 20% to 80% RH. Review your material information (SDS, Instructions for Use, and product labeling) for specific information on recommended humidity levels.

The Figure 4 UV Curing Unit 350 is capable of operating correctly up to an altitude of 2,400 m (7,874 ft) above mean sea level.

Sound Pressure

Overall sound-pressure level for this equipment will not exceed 85 dBA, and, therefore, does not require ear protection to operate.

Disposal of Figure 4 Resin and Waste

When you dispose of green parts, refer to the SDS for that material and follow any applicable government regulations. All waste products (resin-soaked paper towels, cleaning liquids, etc.) must be disposed of in accordance with all applicable government regulations. However, the recommendation is to cure all parts, even those from a failed build. Cured parts may be disposed of in regular trash, which is better for the environment.

Do not clean anything with uncured resin on it in a sink or tub that drains into normal wastewater.

The Figure 4 UV Curing Unit 350 was designed to minimize operator exposure to electrical hazards during normal operations. Do not remove any panels or other parts of the Figure 4 UV Curing Unit 350 casing. All exposed electrical circuits are contained within limited-access cabinets. This is to separate the operator from service and maintenance areas. Only 3D Systems Service Personnel should access the electrical panels. 120-240 V~ power is present in multiple locations throughout the unit. Whenever performing maintenance procedures, power down the machine and unplug it if power is not necessary for service.

ALERT: In the event of an emergency, immediately unplug the power cord from the back of the Figure 4 UV Curing Unit 350.

CAUTION: Do not position the UV Curing Unit 350 such that it is difficult to access the power inlet on the machine in an emergency situation.

There are three different ways to shut down the UV Curing Unit 350:

Pull the power cord out the back of the unit. This disconnects all electric current going to the unit. As such, it is the preferred method of shutting down the unit in an emergency.
Press the lit power button in the upper-left-hand corner of the UV Curing Unit 350. This cuts power from the power supply to the rest of the machine. This does not cut the current going from the wall to the power supply. This is easier access than the I/O switch on the back of the machine, and has almost identical function.
Flip the I/O switch to the O position. This cuts power from the power supply to the rest of the machine. This does not cut the current going from the wall to the power supply. This also prevents the power button on the front of the machine from functioning.

The following paragraphs provide general first-aid procedures and recommendations for protective equipment to minimize the risks from resin exposure. If professional medical attention is necessary, take the Safety Data Sheet (SDS) for the exact resin involved to the attending physician.

Skin Contact

Figure 4 resin may cause sensitization by skin contact. It is irritating to the skin; repeated and/or prolonged contact may cause dermatitis. Wear 100% nitrile gloves and lab coats to avoid skin contact. Should resin, or uncured parts, come in contact with skin, wash thoroughly with soap and COLD water and immediately remove contaminated clothing and shoes. If skin is irritated, get medical attention. Dry-clean contaminated clothing. Discard contaminated shoes and leather products.

Eye Contact

High vapor concentration may cause irritation. Safety goggles should be worn to prevent accidental splashes of resin into the eyes. If resin comes in contact with the eye, flush immediately with large amounts of COLD water for 15 minutes. Avoid sunlight, fluorescent light, and other ultraviolet light, and obtain immediate medical attention. Eye-wash facilities and a first-aid kit should be readily available and close to the resin/green parts.

Contact Lenses

If resin splashes into the eye when contact lenses are worn, flush the eye with water immediately. Verify that flushing has removed the contact lens from the eye. Protect eyes from light and obtain immediate medical attention. Discard contact lenses that come into contact with liquid resin or green parts.

Fume Inhalation

Inhaling fumes from resin is irritating to the respiratory system. High atmospheric concentrations may lead to irritation of the respiratory tract, dizziness, headache and anesthetic effects. Do not operate the Figure 4 UV Curing Unit 350 without its carbon filter in place. For most resins, normal operation of the UV Curing Unit 350 with its filter in place should not emit fumes. If a person should inhale fumes, bring the exposed person to fresh air. Perform CPR if required. If breathing is difficult, give oxygen and obtain immediate medical attention for the person.

Ingestion

If a person ingests material, get medical attention immediately. Immediately rinse the person's mouth and have him/her drink plenty of water.

CAUTION: Use of controls or adjustments, or performance of procedures other than those contained in the operation, maintenance or any other manual provided with this machine may result in hazardous radiation exposure.

NOTE: Closed radiation products are not considered to be hazardous.

The Figure 4 UV Curing Unit 350 incorporates a protective housing and radiation-protective access lid, such that there is little exposure or human access to the radiation generated by the curing chamber during normal operation. Some radiation does leak out at the lid's hinges.

All service to the UV process machine and other components requiring safety switch override, or requiring opening of panels not specified in this manual, shall only be performed by 3D Systems service personnel, their authorized agents, or personnel who have been service-trained by 3D Systems.

The Figure 4 UV Curing Unit 350 has many warning labels throughout. This section details what those warning labels are, how many of each warning label is on each system module, and the locations of each type of label. It is important to use the machine with extreme caution to avoid situations that may be hazardous. The numbers in the Item column below correspond to the numbers in the images that follow.

Item	Description	Qty	Label
1	Product label - Contains system information and certification symbols	1
2 - ISO 7000-0434B	CAUTION: UV RADIATION WARNING - Indicates that UV radiation may be present behind the panel.	1
3 - ISO 7000-0637A	CAUTION: Heat WARNING - Indicates that the machine may be hot inside. It will definitely be hot just after operation.	1
4 - IEC 60417-5007	Power On - To indicate connection to the mains, at least for mains switches or their positions, and all those cases where safety is involved.	1
5 - IEC 60417-5008	Power Off - To indicate disconnection from the mains, at least for mains switches or their positions, and all those cases where safety is involved.	1
6 - IEC 60417-5009	Stand-By - To identify the switch or switch position by means of which part of the equipment is switched on in order to bring it into the stand-by condition, and to identify the control to shift to or to indicate the state of low power consumption. Each of different states of power consumption may be indicated using a corresponding color.	1
7 - IEC 60417-5032	Alternating Current (label inside panel, not accessible by customer) - To indicate on the rating plate that the equipment is suitable for alternating current only; to identify relevant terminals.	1
8 - IEC 60417-5019	Protective Earth; Protective Ground (label inside panel, not accessible by customer) - To identify any terminal which is intended for connection to an external conductor for protection against electric shock in case of a fault, or the terminal of a protective earth (ground) electrode.	1
9	UV Light - Pressing the button accompanying this symbols activates the UV lights inside the machine	1

Inside Top 

Curing Chamber

A Removable Print-Platform Holder - When curing a part directly on the print platform, use this holder to secure the platform in place in the machine. Please see the section Cure Your Printed Parts for more information. B UV Lamps - There are four lamps on each side of the curing chamber (16 total), which drive the post-curing of printed parts. Please see the section Install the UV Lamps for more information. C Platform Locating Pins - Line up with triangular grooves of the Figure 4 print platform to help secure the platform in the machine D Catch Tray - Catches printed parts that may be dropped in the machine, and has a handle for easy removal from the machine.

Curing chamber with Print-Platform Holder uninstalled. See item A, above.

The Figure 4 UV Curing Unit 350 was designed specifically for use with 3D Systems Figure 4^® family of printers. These printers run their own family of print materials, for which this curing unit was designed to post-cure parts. Please the Figure 4 Modular User Guide for a list of supported materials.

CAUTION: Neither 3D Systems, nor its partners, shall be responsible for failed curing processes, or a damaged UV Curing Unit 350, in the event that a part was cured inside that was made from an unsupported material.

This section demonstrates the correct steps to take to unpack your curing unit.

CAUTION: Save all of the packing materials, including the wooden crate, for future use. The provided packaging is the safest means of shipping or transporting your unit.

Inspect Exterior of Crate

Visually inspect the exterior of the crate for any damage that may have occurred during shipping. Notify 3D Systems Service immediately if any damage is evident at this point. DO NOT proceed with the uncrating until you have discussed the damage with 3D Systems.

Uncrate the Unit

Cut and remove the packing straps that hold down the outer carton. Lift and remove the outer carton from the pallet.
Remove the foam insert and desiccant pack (circled) from the top of the curing unit.
Remove the plastic wrap, being careful not to let the wooden ramp (1) and accessories box (2) fall. CAUTION: The accessories box contains UV lamps that, while contained in protective packaging, are fragile.
Remove the wooden ramp (1) and accessories box (2) from the pallet, and place them off to the side.
Remove the anti-static film from the curing unit. NOTE: Leave the blue tape (1) around the lid. The blue tape will prevent the lid from opening while the curing unit is moved into position.
Use a 5 mm Allen wrench to remove the upper-two screws from each of the two pallet mounting brackets.
Use a 14 mm open-end wrench to remove the bottom-two bolts from each of the two pallet mounting brackets. You can now remove each mounting bracket from the pallet.
The pallet has a hole in the middle beam protruding from one side, as seen below. The ramp has a bolt sticking down that fits into this hole. Place the bolt in the hole and lower the ramp down until the top of the ramp is fully seated and fairly level with the top of the pallet. Due to differences in wood and potential warping, you may not get a perfectly flush transition between the pallet and the ramp. →
Turn the casters as shown, aligning the wheels with the grooves in the pallet.
Roll the curing unit down the ramp. Make sure to hold the curing unit upright, as it is somewhat top-heavy.
Move the curing unit to the location where you intend to stage it. Remove the blue tape from around the lid.
Examine the items in the unit and in the box of lamps, ensuring that all items seen on the Accessories list are included with your shipment. There is an identical list included with the Welcome Letter inside the machine's packaging. If any of your items is missing, stop unpacking/installing and contact 3D Systems Service.

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

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."

Use the following diagram to assist in your installation:

The UV lamps are located in the accessories box you removed in the previous procedure. It is best to leave each one in its packaging until you are installing it.
Ensure the machine is powered down and unplugged. Open the lid.
Ensure that both the catch tray (1) and the shelving unit (2) are removed from the machine, as they would be in the way and could break your lamps. Please see the section Broken Fluorescent Lamps for more information.
For each 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, ensuring you follow the installation pattern at the beginning of this section.
Remove the Power Cable from the packaging. A local power cord is dropped into the package just before shipping; so the cord will have been loose in the crate. Follow the instructions in the section Power on UV Curing Unit 350 to plug in the machine and turn it on.
Press the reset button on the Lamp-Time Indicator to ensure that it is set to 0 (it should already be set at zero by 3D Systems). Do not forget this step, as the light hours will guide you in when to perform your first lamp replacement.

Your UV Curing Unit 350 is now set up and ready to use!

Your 3D Systems installer should have plugged in your machine and powered it on. This section describes the process to follow in case the machine has become unplugged/switched off. 

CAUTION: Safety relies upon the connection to protective earth via the connection with the power cord to the appliance inlet (Figure 1, below).

CAUTION: Do not replace the power cord with any cord other than that which is supplied by 3D Systems for this machine.

Ensure the I/O Switch is in the O position, and then ensure the power cord is plugged in.
Put the I/O Switch into the I position.
Push the power button on the front of the machine. You will notice that the power button lights up and the Timer Panel turns on. If this does not happen, check your power connections. If the problem persists, contact 3D Systems Service. Your UV Curing Unit 350 is now powered on!

Prior to using the Figure 4 UV Curing Unit 350, ensure you have completed the following post-processing steps, as seen in your printer's Post-Processing Guide:

• Clean the part with the recommended method and solvents
• Completely dry the part
• If curing on the glass plates, remove all supporting architecture from the parts before placing them in the machine. Supports will be significantly harder to remove if they are cured on the part.

CAUTION: Failure to complete any of these steps before placing parts in the UV Curing Unit 350 risks under-cured and/or warped parts.

Additional Documentation

Ensure you have read your printer's Post-Processing Guide, and your resin's User Guide. Both guides contain the recommended, tested curing times for Figure 4 resins.

You are now ready to cure your printed parts. There are two ways to do this:

• Cure the part on the print platform.
• Cure the part on the shelving unit.

For either method, use the following guidelines:

• Ensure that the green part does not touch the UV lamps as you are inserting it in the machine. If any uncured resin transfers to a UV lamp, this material will cure on the lamp, causing it to be less effective in curing future parts.
• Ensure that the green part is not resting against anything in the machine, such as the shelving unit, a UV lamp, or inside wall. Your part should be cured in a position in which it is self-supporting.
• Keep in mind that removing cured supports from a part, and removing cured material from the print platform, is considerable more difficult than doing this while everything is uncured. So only cure on the platform if absolutely necessary to stay in line with the other guidelines above.

Cure the Part on the Print Platform

You may want to keep your part on the print platform for curing if:

• The part is taller than 200 mm
• The part's shape prevents it from standing freely on the shelving unit without touching the shelf frame or any UV lamps

Please complete the following instructions to cure a part on the print platform:

Ensure the shelving unit is NOT inside the machine. Holding the platform holder by the platform supports, lower it carefully into the machine. PINCH POINT: TAKE CARE DURING THIS STEP. THE PLATFORM HOLDER ATTACHES VIA MAGNETS, WHICH GRIP TIGHTLY WHEN THE HOLDER GETS CLOSE TO THEM.
Wearing nitrile gloves, insert the part/platform with the part going in the curing chamber first. Take care not to brush the part against the UV lamps on the way down.
Line the print platform's triangular grooves up on the locating pins on the middle of the part-mount rests. Ensure the print platform is fully seated in the machine.
Close the lid, ensuring that it is fully seated.
Use the four up/down switches on the Timer Panel to set the curing time according to the time prescribed for your resin. Please see your printer's Post-Processing Guide, or the resin's User Guide, for your resin's curing time. The time format is MM/SS. CAUTION: Curing for less time than what is prescribed will leave the part under-cured and not safe to touch with human hands. Curing for more time than prescribed risks over-curing the part. An over-cured part can be discolored and possibly misshapen.
Press the Start button, which is directly to the left of the Timer Panel. You will see the Start button light up and you will hear cooling fans turn on, which is the indication that the curing process has started. When the timer runs out, the parts are done. Use insulated gloves to remove the platform/part from the curing unit, as the part/inside of unit will be hot.
Follow your printer's Post-Processing Guide to properly remove your part(s) from the print platform, and to remove the supports from it. NOTE: If your part has surface tackiness or oiliness, it is not fully cured. Proceed to the Troubleshooting section for more information.

Cure the Part on the Shelving Unit

You may want to cure your part on a glass plate if:

• The part is shorter than 200mm
• The part's shape allows it to stand freely on the shelving unit without touching the shelf frame or any UV lamps

Please complete the following instructions to cure a part on the shelving unit:

Orient your parts on the glass shelves so that all parts are within the confines of the plates. Do NOT put any parts on the top shelf, as it is only there to help keep uniform heat in the curing chamber.
Ensure that the removable platform holder is NOT in the machine. Remove it by grabbing the platform supports and pulling up.
Holding the shelving unit by the top handles (1), carefully lower it into the machine so that the handles rest on the lip at the top of the unit.
Perform Steps 4-7 from the previous section to cure the parts. When you have removed the parts, they are safe to touch without nitrile gloves. They are also ready for any other part finishing you wish to do, such as sanding down the contact points from the supports. NOTE: If your part has surface tackiness or oiliness, it is not fully cured. Proceed to the Troubleshooting section for more information.

You have successfully cured your printed parts with the Figure 4 UV Curing Unit 350!

Whenever the UV Curing Unit 350 is not in use, it remains in a standby mode, drawing a low amount of power. However, a complete shutdown can be achieved by either pressing the power button on the front or back of the machine. Please see the section Emergency Shutdown for more information.

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: 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.

Your new lamps are ready for use inside the machine!

You must replace the carbon filter on the back of the UV Curing Unit 350 every time you change out the lamps. This is to ensure proper handling of odors from the curing process.

Power down the machine and unplug it.
Loosen all four thumb screws on the filter bracket. It will be easiest to do this in the order shown at the right.
When loosening the last two thumb screws, hold the bracket against the machine with your other hand to prevent it from falling.
Once the bracket is removed, there is nothing holding the filter in place. You may now remove it.
Install your new carbon filter, ensuring that it is oriented in the machine such that the airflow arrow points out of the machine.
When reinstalling the filter bracket, it is easiest to grab it by the top two thumb screws and line up the screws on the top two holes on the UV Curing Unit 350. Secure these screws first, and then screw in the bottom two.

Your new carbon filter is ready to use!

The shelving unit must be cleaned if:

• You notice a buildup of partially cured or fully cured resin on any component that could inhibit future part curing. In particular, if resin builds up on a glass plate, this could block the path of UV light to reach a green part.
• You notice any foreign debris on the glass plates. Dust or other debris left on a plate could cure into future parts and be very difficult to remove.
• You have performed several curing sessions without cleaning the shelving unit. Depending on the print materials you run, cured material may be hard to see. Thus it is necessary to clean these components on a regular basis, even if it appears there is no debris/material present.

CAUTION: Do NOT use glass cleaner to clean the glass plates.

WEAR 100% nitrile gloves whenever cleaning the shelving unit or glass plates.

Spray IPA (isopropyl alcohol) on a nonabrasive cloth.
On your part-finishing workbench, wipe down all metal components and all the glass plates with the IPA dampened cloth.
Optionally, you can remove the glass plates from the shelving unit by removing the side screws with an M2.5 Allen wrench. Then, over your part-cleaning tub, spray each glass plate with IPA on both sides. Wipe the plate down with a nonabrasive cloth until dry. NOTE: If there is cured resin stuck to the glass, you may have to soak the plate in IPA to loosen it up.
Either let the shelving unit out to air dry, or dry it with compressed air, before inserting it back in the UV Curing Unit 350. Your shelving unit is clean and ready for reuse!

Use the following guidelines when cleaning any other part of the machine:

• Do NOT use ammonia-based cleaners.
• Use IPA (isopropyl alcohol) or EtOH (Ethanol) on a nonabrasive cloth to clean both the inside and outside of the machine. These solvents are proven to clean resin off of surfaces.
• Do NOT spray solvents directly onto any components. Always spray onto nonabrasive cloth first.
• If resin gets on the unit, do NOT wait to clean it up. Ambient light in the room will cure any resin on the machine, making it more difficult to remove as time goes on.

to avoid skin exposure to uncured resin and solvents, WEAR 100% nitrile gloves whenever cleaning the machine.