Nordson CoolWave 2 User manual

CoolWaver2
410 UV Curing System
Customer Product Manual
Part 1089210A04
Issued 06/10
NORDSON CORPORATION AMHERST, OHIO USA
To order parts call 866-885-1212.
For technical support call 800-524-1322.
Check http://emanuals.nordson.com/finishing for the latest version.
This document is subject to change without notice.

Part 1089210A04 E2010 Nordson Corporation
Address all correspondence to:
North American Sales and Service All other countries
Nordson UV Systems Inc. Nordson UV Systems Ltd.
555 Jackson Street
Amherst, OH 44001
United States
667 Ajax Avenue
Slough
Berkshire UK
SL1 4DB
Tel: [phone]
[phone]
Fax: [phone]
Tel: [phone]
Fax: [phone]
Email: [email protected] Email: [e-mail]
Website: www.uv.curing.com
Nordson Corporation welcomes requests for information, comments, and
inquiries about its products. General information about Nordson can be
found on the Internet using the following address:
http://www.nordson.com.
Notice
This is a Nordson Corporation publication which is protected by copyright.
Original copyright date 2008. No part of this document may be
photocopied, reproduced, or translated to another language without the
prior written consent of Nordson Corporation. The information contained
in this publication is subject to change without notice.
Trademarks
CoolWave, Nordson and the Nordson logo are registered trademarks of
Nordson Corporation.
DeviceNet is a trademark of ODVA, Inc.
All other trademarks are the property of their respective owners.

Table of Contents i
Part 123456X
E2002 Nordson Corporation Manual XX-XX
Table of Contents
Safety 1-1..................................................
Introduction 1-1.............................................
Qualified Personnel 1-1......................................
Intended Use 1-2............................................
Regulations and Approvals 1-2................................
Personal Safety 1-3..........................................
Ultraviolet Radiation 1-3......................................
First Aid 1-5..............................................
Microwave Radiation 1-5.....................................
Ozone 1-6..................................................
High Temperatures 1-7.......................................
High Voltage 1-7............................................
Mercury Bulbs (Lamps) 1-7...................................
UV-Curable Inks and Products 1-8.............................
Fire Safety 1-8..............................................
Action in the Event of a Malfunction 1-8........................
Safety Precautions While Servicing 1-9.........................
Control System Cleaning 1-9...............................
High Voltage Connections 1-9..............................
Cabinet Cooling 1-9.........................................
Disposal 1-9................................................
Moving and Storage 1-10......................................
Safety Symbols 1-10..........................................
Description 2-1.............................................
Introduction 2-1.............................................
What is UV Curing? 2-1......................................
The UV Curing System 2-1.................................
How Does it Work? 2-1....................................
System Components 2-2.....................................
Reflectors 2-4...............................................

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Manual XX-XX
Installation 3-1..............................................
Introduction 3-1.............................................
Inspection and Packaging 3-1.................................
Power Supply Installation 3-1.................................
Mounting Guidelines 3-1...................................
Power Supply Electrical Connections 3-3.....................
Power Connections 3-3..................................
Power Supply Balancing 3-4.............................
Network Connections 3-6..................................
Remote I/O Inputs and Outputs 3-6..........................
Machine Stop Interlock 3-8...............................
Remote Power Level Control 3-8.........................
Idle Mode 3-9..........................................
Remote Standby and Lamp On 3-9.......................
Rapid Cycle Using Idle Mode 3-10.........................
DeviceNet Installation 3-10..................................
Chassis Isolation 3-10....................................
BUS Power 3-10.........................................
Hardware Specifications 3-11.............................
Software Specifications 3-11..............................
Lamphead Installation 3-11....................................
Mounting Guidelines 3-11...................................
Light Shielding 3-11........................................
Internal Blower 3-12........................................
External Blowers −Cooling Air 3-12..........................
Cooling Exhaust Air −Lamphead/Chamber Cooling Air Removal ....
3-12
Monitoring Static Pressure 3-15..............................
Top/Front Pressure Port 3-15..............................
Bottom Pressure Port 3-15................................
Switching Pressure Ports 3-16.............................
Lamphead Cable Connections 3-17..........................
RF Detector Installation 3-18...................................
Power Supply Configuration 3-19...............................
Operation 4-1...............................................
Introduction 4-1.............................................
Display and Controls 4-1.....................................
Additional Functions 4-3...................................
Temperature 4-3........................................
Light Detector 4-3......................................
Starter Bulb Test 4-3....................................
Panel Lock 4-3.........................................
Display Messages 4-4.......................................
Fault Messages 4-4..........................................
Resetting Faults 4-5.......................................
Startup 4-6.................................................
Locally Operated Units 4-6.................................
Remotely Operated Units 4-8...............................
Shutdown 4-9...............................................

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E2002 Nordson Corporation Manual XX-XX
Maintenance 5-1............................................
Power Supply Maintenance and Repair 5-1.....................
Maintenance Schedule 5-1.................................
Power Supply Repair Procedures 5-1........................
Preparation 5-1.........................................
Fuses 5-2.............................................
Power Supply Cooling Fan Cleaning 5-3...................
Lamphead Maintenance and Repair 5-4........................
Lamphead Repair Procedures 5-5...........................
Preparation 5-5.........................................
Bulb Replacement 5-5...................................
Reflector Replacement 5-6...............................
Internal Blower Lamphead Cover Removal 5-9................
Internal Blower Lamphead Cover Replacement 5-10............
Internal Lamphead Component Replacement 5-11.............
Preparation 5-11.........................................
Light Detector Board 5-12.................................
Starter Bulb Replacement 5-13............................
Magnetron Replacement 5-13.............................
Troubleshooting 6-1.........................................
System Software Versions 6-1................................
General Troubleshooting 6-1..................................
Fault Message Troubleshooting 6-2............................
Bulb Troubleshooting 6-6.....................................
Curing Process Troubleshooting 6-6...........................
General Lamphead Troubleshooting 6-7........................
Parts 7-1...................................................
Introduction 7-1.............................................
Using the Illustrated Parts List 7-1...........................
CW-2 Power Supplies 7-2....................................
Repair Parts 7-2..........................................
CW-2 Lampheads 7-4........................................
System Cables 7-6..........................................
RF Detector 7-7.............................................
External Blowers 7-7.........................................
Reflector Conversion Kits 7-7.................................
Accessories 7-7.............................................
Specifications 8-1...........................................
Power Supply 8-1...........................................
Light Output Settings 8-2.....................................
Master/Remote Power Setting Examples 8-2.................
Lamphead 8-3..............................................
Bulb 8-3....................................................
System Schematics 8-3......................................

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Part 123456X E2002 Nordson Corporation
Manual XX-XX
UV Glossary 9-1............................................
DeviceNet Specifications 10-1................................
Introduction 10-1.............................................
Definitions 10-1............................................
Reference Documents 10-1.................................
Governing Body 10-1.......................................
System Operation 10-2........................................
MAC ID / Baud Rate Configuration 10-2.......................
LED Operation 10-3........................................
DeviceNet Interface 10-4......................................
Overview 10-4.............................................
Configuration 10-4.........................................
Initialization 10-4...........................................
Group 2 Only Slave Operation 10-4..........................
Certification 10-4...........................................
Identity Object (01HEX −1 Instance) 10-5.......................
Class Attributes (Instance 0) 10-5............................
Instance Attributes (Instance 1) 10-5..........................
Common Services 10-5.....................................
Message Router Object (02HEX −1 Instance) 10-5...............
DeviceNet Object (03HEX −1 Instance) 10-6....................
Class Attributes (Instance 0) 10-6............................
Instance Attributes (Instance 1) 10-6..........................
Common Services 10-6.....................................
Assembly Object (04HEX – 2 Instances) 10-7....................
Class Attributes (Instance 0) 10-7............................
Instance Attributes (Instances 100 and 112) 10-7...............
Common Services 10-10.....................................
Connection Object (05HEX −2 Instances) 10-11..................
Class Attributes (Instance 0) 10-11............................
Instance Attributes (Instances 1 −2) 10-11.....................
Common Services 10-12.....................................
S−Device Supervisor Object (30HEX −1 Instance) 10-12...........
Class Attributes (Instance 0) 10-12............................
Instance Attributes (Instance 1) 10-12..........................
Common Services 10-13.....................................
Exception Detail Alarm / Warning 10-14........................
Lamp Object (64HEX −16 Instances) 10-15......................
Class Attributes (Instance 0) 10-15............................
Instance Attributes (Instances 1−15) 10-16.....................
Common Services 10-16.....................................

Change Record i
Part 1089210A04
E2010 Nordson Corporation
Change Record
Revision Date Change
A02 8/09 Part Number 1085680 replaced by 772214 under Repair Parts.
A03 06/10 Added Cooling Exhaust Air −Lamphead Cooling Air Removal text on
pages 3−12, 13.
Under lamphead repair parts, part number 1102567 replaces part
number 1088443 for internal blower filter kit, 4 pack.
A04 6/10 Updated UV contact information.
Added information on T3 transformer.
Added pressure table for Monitoring Static Pressure and Light Detector
section.
Updated new part numbers for the main control board (1101815) and the
phase control board (1102449).

Change Record
ii
Part 1089210A04 E2010 Nordson Corporation

Safety 1-1
Part 1089210A04
E2010 Nordson Corporation
Section 1
Safety
Introduction
Read and follow these safety instructions. Task- and equipment-specific
warnings, cautions, and instructions are included in equipment
documentation where appropriate.
Make sure all equipment documentation, including these instructions, is
accessible to all persons operating or servicing equipment.
All equipment is designed and manufactured to International Safety
Standards to ensure that the health and safety of the operator is protected
at all times.
Figure 1-1 Microwave UV Warning
Qualified Personnel
Equipment owners are responsible for making sure that Nordson equipment
is installed, operated, and serviced by qualified personnel. Qualified
personnel are those employees or contractors who are trained to safely
perform their assigned tasks. They are familiar with all relevant safety rules
and regulations and are physically capable of performing their assigned
tasks.

Safety
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Part 1089210A04 E2010 Nordson Corporation
Intended Use
Nordson ultraviolet (UV) equipment is intended specifically for integration
into other machines and should NOT be operated as a standalone system
or without appropriate safety guarding, shielding, and interlocks. It is the
responsibility of the integrator and end user to ensure that the final
assembly fulfills all necessary legislation and is completely safe before
operation.
This equipment is designed for the accelerated curing of UV inks,
adhesives, and coatings. Do not use this equipment to cure alternative
materials unless approved by the material supplier.
The equipment is not flame or explosion proof and is not designed for use in
hazardous areas.
Use of Nordson equipment in ways other than those described in the
documentation supplied with the equipment may result in injury to persons
or damage to property.
Some examples of unintended use of equipment include
Susing incompatible materials
Smaking unauthorized modifications
Sremoving or bypassing safety guards, shielding or interlocks
Susing incompatible or damaged parts
Susing unapproved auxiliary equipment
Soperating equipment in excess of maximum ratings
Susing equipment in hazardous areas
Regulations and Approvals
Make sure all equipment is rated and approved for the environment in which
it is used. Any approvals obtained for Nordson equipment will be voided if
instructions for installation, operation, and service are not followed.
Currently there are two organizations that set recommended guidelines for
exposure to occupational microwave radiation exposure, OSHA (U.S.
Department of labor, Occupational Safety and Health Administration −
Directive 29cfr 1910.97) and ANSI (American National Standards Institute −
Directive C95.1−1982). The ANSI directive, which is more stringent and
most commonly referred to, states that individuals should not be exposed to
microwave radiation levels above 5 mW/cm2at 2.45 GHz on a continuous
basis.

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E2010 Nordson Corporation
Personal Safety
To prevent injury follow these instructions.
SDo not operate or service equipment unless you are qualified.
SDo not operate equipment unless safety guards, light shields, doors,
and/or covers are intact and automatic interlocks are operating properly.
Do not bypass or disarm any safety devices.
SKeep clear of moving equipment. Before adjusting or servicing any
moving equipment, shut off the power supply and wait until the
equipment comes to a complete stop. Lock out power and secure the
equipment to prevent unexpected movement.
SObtain and read Material Safety Data Sheets (MSDS) for all materials
used. Follow the manufacturer’s instructions for safe handling and use
of materials. Always use recommended personal protection devices.
SMake sure the UV area is adequately ventilated.
SThe UV equipment runs at extremely high temperatures. Do not touch
the UV lamphead face during operation or immediately after shutting off
the equipment.
STo prevent injury, be aware of less-obvious dangers in the workplace
that often cannot be completely eliminated, such as hot surfaces, sharp
edges, energized electrical circuits, and moving parts that cannot be
enclosed or otherwise guarded for practical reasons.
SAlways wear safety glasses that offer UV protection.
SNever expose any part of the body to direct or indirect UV light.
Ultraviolet Radiation
WARNING: Ultraviolet light is a form of electromagnetic radiation and can
be harmful if exposure exceeds recommended levels. Protect eyes and
skin from direct exposure to UV light. All equipment or areas where UV light
is used must be adequately guarded, shielded, and interlocked to prevent
accidental exposure.
Ultraviolet light is not capable of penetrating into the body and interacting
with internal tissues and organs.
The National Institute for Occupational Safety and Health (NIOSH)
document Criteria for Recommended Standard... Occupational Exposure to
Ultraviolet Radiation (PB214 268) establishes guidelines for safe use.

Safety
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Part 1089210A04 E2010 Nordson Corporation
See Figure 1-1. Ultraviolet light is divided into wavelength bands A, B, C,
and V along with vacuum UV. Although values for wavelength bands will
vary depending on the source, the following ranges may be used as a
guide.
SVacuum UV (100−200 nanometers) −absorbed by air and poses no
danger to humans.
SUV-A (315−400 nanometers) −represents the largest portion of UV
energy and is most responsible for human skin aging and increased
pigmentation. UV−A is at the lower limit of sensitivity to the human eye.
Referred to as far UV.
SUV-B (280−315 nanometers) −most responsible for reddening and
burning of the skin and damage to the eyes.
SUV-C (200−280 nanometers) −filtered by ozone. Referred to as near
UV.
SUV-V (400−450 nanometers) – visible UV.
Exposure to UV radiation can result in
Sreddening of skin
Sheadaches
Ssore eyes
X RAYS ULTRA
VIOLET INFRA RED MICROWAVES RADIO WAVES
VISIBLE
VACUUM UV
FAR
UV
NEAR
UV
UVC UVA
U
V
B
100 200 300 500 600 700 800 900400 1000 nanometers
U
V
V
Figure 1-2 Ultraviolet Light Wavelength Bands

Safety 1-5
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E2010 Nordson Corporation
It is very important that all precautions are taken to prevent all UV light,
whether direct or indirect, from escaping the curing area. Exposure to UV
light can be harmful to both eyes and skin. Use the following table to
determine the permissible exposure time to UV light on unprotected eyes or
skin.
Permissible Ultra Violet Exposures as Recommended by the
American Conference of Government and Industrial Hygienists
Duration of Exposure (Per Day) Effective Irradiance (E Micro
Watts/cm sq)
8 hours 0.1
4 hours 0.2
2 hours 0.4
1 hour 0.8
30 minutes 1.7
15 minutes 3.3
10 minutes 5.0
5 minutes 10
1 minute 50
30 seconds 100
10 seconds 300
1 second 3000
First Aid
Store-bought creams, lotions, or aloe can be applied to affected areas of the
skin. Seek immediate medical attention for skin burns and direct UV
exposure to the eyes.
Microwave Radiation
WARNING: The lamp system utilizes high powered RF microwave energy
generated by a magnetron to provide power to the UV lamp. This
technology is identical to that of residential microwave ovens and like these
ovens can be dangerous if misused. The lamp system is safe provided that
the RF screen and gasketing are intact. Any damage such as rips or holes
in the screen may cause leakage of dangerous amounts of microwave
radiation. The power to the lamp is interlocked to the RF detector and will
shut down if microwave leakage exceeds safe levels. Any excessive
leakage will cause the system to shutdown.

Safety
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Part 1089210A04 E2010 Nordson Corporation
Ozone
Ozone (O3) is a colorless gas that is generated by the reaction of
short-wave UV light (around 200−220 nanometers) with air, and it occurs
whenever high-energy electrical discharge is present.
Ozone readily reverts to breathable oxygen when mixed with atmospheric
air. Ozone should be removed from the UV source via a sealed duct and
discharged to atmosphere according to local regulations. The discharge
location should be away from pedestrian walkways and window openings
and should be well above the average human breathing height for the area.
Regular ozone checks should be carried out every three months using an
ozone meter. Recommended levels of ozone in the atmosphere of a factory
should not exceed 0.1 parts per million (PPM). This level is easily
obtainable if factory recommended exhaust rates are followed.
Ozone has a very distinct, strong odor even at low levels. Immediate ozone
checks should be made if an operator can smell ozone. Most people can
smell ozone at about one third the maximum allowable 0.1 PPM level.
Ozone exposure will cause headaches and fatigue. It will also irritate the
mouth and throat. Overexposure can lead to respiratory infections.
If ozone is detected,
1. Shut down the UV system.
2. Check exhaust ducting for leaks.
3. Check the operator working area with an ozone meter.
If a person is overcome by ozone,
SMove the individual to a warm uncontaminated atmosphere and loosen
tight clothing at the neck and waist.
SKeep the individual at rest.
SIf the person has difficulty breathing, oxygen may be administered
provided that suitable apparatus and a trained operator are available.
SIf breathing is weak or has ceased, artificial respiration should be
started.
SSeek medical assistance.

Safety 1-7
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E2010 Nordson Corporation
High Temperatures
UV curing systems generally run at extremely high temperatures. A sudden
shock from touching a high temperature surface might cause an operator to
jump or take his attention away from other potential hazards.
When shutting down UV equipment for maintenance, allow the equipment to
cool before beginning work, or wear protective gloves and clothing to
prevent burns.
High Voltage
The UV curing equipment operates at high voltages up to 5000 Vdc. If any
electrical faults develop, the operator should:
1. Switch the equipment off immediately.
2. Make no attempt to service the equipment.
3. Call a qualified electrician, trained to service this type of equipment.
Mercury Bulbs (Lamps)
The bulbs used in UV lamp systems contain mercury. Mercury is a toxic
substance and must not be ingested or come into direct contact with the
skin. Under normal UV operating conditions, mercury presents no hazard
as it is completely contained in the sealed quartz tube of the bulb; however,
it is strongly recommended that protective gloves and eye protection be
worn when handling UV bulbs.
These precautions should be followed when disposing of UV bulbs:
SPlace the bulb in a rigid protective carton.
SDispose of used bulbs through a local mercury recycling center.
SWash your hands if a bulb breaks: mercury could come into contact with
your skin.
SDo not store or handle bulbs near food or beverages.
Nordson Corporation will dispose of UV bulbs free of charge provided the
customer covers all shipping costs associated with returning the bulbs. For
bulb disposal, please clearly mark on the all bulb containers and shipping
packages: BULBS FOR DISPOSAL ONLY.
Bulbs should be shipped to:
Horizon Lamps
Bulb Disposal Department
2 Dan Forth Drive
Easton, Pennsylvania 18045

Safety
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Part 1089210A04 E2010 Nordson Corporation
UV-Curable Inks and Products
Some materials used in UV curable inks, adhesives, and varnishes are
toxic. Before handling them, read the Material Safety Data Sheets provided
by the manufacturer, use the recommended personal safety equipment, and
follow the recommended procedures for safe use and disposal.
Fire Safety
Under proper operating conditions, the surface temperature of the bulb is
anywhere between 700−900 _C (1300−1700 _F), and the vapor gas inside
the bulb is several thousand degrees Fahrenheit.
Any form of flammable material (such as paper, lint, powder, or dirt) trapped
under the lamp, within the lamp housing or in the lamp’s vicinity, will result in
an increased risk of fire.
To avoid a fire or explosion, follow these instructions.
SKnow where emergency stop buttons, shut-off valves, and fire
extinguishers are located.
SClean, maintain, test, and repair equipment according to the instructions
in this manual.
SAlways keep a fire extinguisher approved for electrical equipment near
the unit.
Should a fire occur, the operator must:
1. Switch the equipment off immediately.
2. If possible, put out the fire with a fire extinguisher.
Action in the Event of a Malfunction
If a system or any equipment in a system malfunctions, shut off the system
immediately and perform the following steps:
SDisconnect and lock out electrical power.
SIdentify the reason for the malfunction and correct it before restarting the
equipment.

Safety 1-9
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Safety Precautions While Servicing
A qualified competent electrician must carry out all electrical maintenance
and servicing of this equipment.
WARNING: This equipment operates at high voltages up to 5000 volts dc
and is therefore potentially dangerous. The electrician servicing this
equipment must take all precautions.
WARNING: Isolate the equipment at the main, disconnect or lockout before
removing any of the cover panels.
Control System Cleaning
Keep all contactors and relays clean and free from dirt and dust. Check
these regularly, particularly in extremely dusty or powder-charged working
rooms.
High Voltage Connections
Check the high-voltage connections within the equipment carefully to make
sure that these do not become dirty or coated with powder or other possible
conducting material. Clean them regularly, at least whenever the lamp is
changed, possibly more often where a particularly heavily polluted
atmosphere occurs.
Always make sure the unicable connectors are secure and tight before
applying power.
Cabinet Cooling
Check the cabinet cooling fan at least weekly and keep clear of any material
that might clog or stop its operation. The power supplies run warm and
keeping them cool with proper ventilation will prolong their life.
Disposal
Dispose of equipment and materials used in operation and servicing
according to local codes.

Safety
1-10
Part 1089210A04 E2010 Nordson Corporation
Moving and Storage
Moving or storing of the Nordson UV curing system must comply with all
applicable local and state regulations. All electrical power and other
services must be disconnected and the lamphead must be cool before
moving or storing this equipment. Power supplies should be properly
attached or fastened to an appropriate fixture such as a pallet for handling
and storing.
Due to the power supply’s weight, it is recommended a mechanical device
be used for handling and they should be kept as low to the floor as possible.
It is recommended that the bulb be removed from the lamphead and stored
or shipped in the original shipping tube. The lamphead and power supply
should be shipped and or stored in the original container or an equivalent
and kept dry and clean at all times.
Shipping of Nordson UV curing systems and their component parts must be
done in accordance with all applicable shipping regulations including
requirements for shipping of magnetic materials and mercury lamps.
Safety Symbols
The following safety symbols are used in this manual. The symbols are
used along with warnings to help you operate and maintain your equipment
safely. Pay attention to all warnings and follow directions to avoid personal
injury.
WARNING: Mechanical or combined mechanical/electrical hazards.
WARNING: Electrical hazard.
WARNING: UV/Microwave radiation hazard.
WARNING: Hot surface hazard.
CAUTION: Equipment hazard.

Description 2-1
Part 1089210A04
E2010 Nordson Corporation
Section 2
Description
Introduction
The CoolWave 2 Ultraviolet Microwave-Applied Curing System consists of a
MPS2-410 power supply and a CW2-410 lamphead. The power supply unit
provides the high voltage supply for the lampheads and a control circuit to
interlock the lampheads with the curing machine.
What is UV Curing?
Ultraviolet curing is achieved by a chemical reaction in special inks and
coatings when intense UV energy is focused on them. Curing efficiency
depends on UV power, coating weight, operation speed, type of substrates,
material chemistry, and other factors.
The UV Curing System
The system is designed to cure UV inks, adhesives, and coatings for
numerous industrial applications. The system consists of an individual
10-in. lamphead, a corresponding variable output power supply, and an RF
detector. Additional lampheads can be lined up end-to-end to form longer
curing widths.
Table 2-1 and Figure 2-1 describe and illustrate the major components of a
typical CoolWave ultraviolet microwave applied curing system. Your system
may appear different depending on your application requirements.
How Does it Work?
A microwave generator (magnetron) operating at 2400 to 2500 MHz is used
to excite a medium pressure mercury bulb installed in a lamphead.
Ultraviolet light between 220 and 470 nanometers is emitted.
Microwave energy from a magnetron is directed into a cavity containing the
UV bulb. A screen located at the opening of the cavity allows the UV light to
pass through while the microwave radiation is contained.
In addition to ultraviolet light, the high-energy bulbs radiate heat. Therefore,
a cooling system is incorporated to take away the excess heat and make
sure that the bulbs and housings remain at an acceptable operating
temperature.

Description
2-2
Part 1089210A04 E2010 Nordson Corporation
The unit is fitted with interlocks and safety faults that prevent the operation
of the system in an unsafe condition and indicate any faults that might occur
on the front panel of the power supply.
Light shielding is required to ensure the stray UV light and heat meet
agreed safety criteria.
System Components
Refer to Table 2-1 and Figure 2-1 for a description of the system
components.
Table 2-1 System Components
Item Component Description
1 Lamphead The lamphead consists of a bulb housing, UV bulb, wave guide,
reflectors, pressure and temperature sensors, starter bulb, and the
magnetron assembly. The patented wave guide also couples RF
energy to the bulb and provides cooling for the bulb. The lamphead
reflects the emitted UV light onto the substrate.
2Ultraviolet Bulbs
NOTE: The system warranty is void if genuine Nordson UV bulbs are
not used. Contact a Nordson UV representative for ordering
information.
The system uses medium-pressure mercury bulbs. The bulbs consist
of high-purity quartz and have various fills (including doped spectrally
enhanced metal halide) to produce light at different wavelengths.
Bulbs and controls are carefully matched to give optimum UV output
and wavelength requirements.
Use genuine Nordson replacement bulbs with this system.
Alternative bulbs may damage the control or overheat the reflec-
tor system.
3 Reflectors Refer to Reflectors on page 2-4 for more information. Elliptical
shaped focus reflectors are used to guide the UV light in a tight band
across the surface of the material being cured. The reflectors are
manufactured from glass with a proprietary coating to give maximum
UV reflectivity while minimizing infrared radiation.
NOTE: A wider band of light can be produced by using optional flood
reflectors.
4Starter Bulb The starter bulb acts as the ignitor for the ultraviolet bulb. The starter
bulb lights at the same time the magnetron is energized. After the UV
bulb reaches full power the starter bulb turns off automatically.
5Light Detector
Pressure
Transducer
Monitors the lamphead cooling and shuts down system power in the
event of a cooling failure to prevent a catastrophic failure.
Monitors the light from the lamphead bulb and shuts the system down
if the bulb fails to emit enough light.
6 Magnetrons The magnetrons are 3 kW, 2450 MHz frequency generators that
convert high voltage electrical inputs to RF energy. The wave guide
cavity is designed to direct the RF energy into the UV bulb, thus
exciting a UV emitting plasma within the bulb.