3M MicroTouch Near Field Imaging (NFI) Quick setup guide

3M Touch Systems Proprietary Information
touch
SOLUTIONS
DEPENDABLE
•
INNOVATIVE
•
GLOBAL
•
EXPERIENCE DEPENDABLE
•
INNOVATIVE
•
GLOBAL
•
EXPERIEN
C
Projected Capacitive Near
Field ImagingTM (“NFI”)
Integration Guide

Copyright This manual is © 3M 2003. All rights reserved.
Reproduction of the contents of this copyrighted manual in whole or in part, by
anymeans,electronicormechanical,foranypurpose,withoutwrittenpermission
of 3M Touch Systems, a subsidiary of 3M, is prohibited.
Notice Given the variety of factors that can affect the use and performance of a 3M
Touch Systems Product (the “Product”), including that solid state equipment has
operation characteristics different from electromechanical equipment, some of
which factors are uniquely within User’s knowledge and control, it is essential
that User evaluate the 3M Touch Systems Product and software to determine
whether it is suitable for User’sparticular purpose andsuitable for User’s method
of application. 3M Touch Systems’ statements, engineering/technical
information, and recommendations are provided for User’s convenience, but
theiraccuracyorcompletenessis not warranted. 3M Touch Systems productsand
software are not specifically designed for use in medical devices as defined by
United States federal law. 3M Touch Systems products and software should not
be used in such applications without 3M Touch Systems’ express written
consent. User should contact its sales representative if User’s opportunity
involves a medical device application.
Important notice to
purchaser Specifications are subject to change without notice. These 3M Touch Systems’
Products and software are warranted to meet their published specifications from
the date of shipment and for the period stated in the specification. 3M Touch
Systems makes no additional warranties, express or implied, including but
not limited to any implied warranties of merchantability or fitness for a
particular purpose.
User is responsible for determining whether the 3M Touch Systems Products and
software are fit for User’s particular purpose and suitable for its method of
production, including intellectual property liability for User's application. If the
Product, software or software media is proven not to have met 3M Touch
Systems’ warranty, then 3M Touch Systems’ sole obligation and User’s and
Purchaser’s exclusive remedy, will be, at 3M Touch Systems’ option, to repair
or replace that Product quantity or software media or to refund its purchase price.
3MTouchSystemshas no obligation under 3M Touch Systems’ warranty for any
Product, software or software media that has been modified or damaged through
misuse, accident, neglect, or subsequent manufacturing operations or assemblies
byanyone other than 3M Touch Systems. 3MTouch Systems shallnot be liable
inanyactionagainstit in any way related to the Productsor software for any
lossordamages, whethernon-specifieddirect, indirect,special,incidental or
consequential (including downtime, loss of profits or goodwill) regardless of
the legal theory asserted.
Edition July 2003. Document Number: 14116 (Rev. 3.0)
Trademarks MicroTouch, Near Field Imaging, and TouchSurround are trademarks of 3M.
Microsoft, Windows, MS-DOS, Windows NT, Windows 2000,
Windows XP, and/or other Microsoft products referenced herein are
either trademarks or registered trademarks of Microsoft Corporation in
the United States and/or other countries. JST is a registered trademark of
J.S.T. Mfg. Co., Ltd.
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Product Safety Information
Intended use
The Near Field ImagingTM (NFI) touch screen system is composed of components
for incorporation in electrical or electronic apparatus, equipment or installations.
The NFI touch screen system has been tested to the standards that are cited in the
Appendix of this integration guide to show compatibility for use in products
requiring CE marking under the following directives: the EMC Directive
89/336/EEC, the Low Voltage Directive 73/23/EEC, and the Machinery Directive
89/392/EEC. Caution: Changes or modifications to this equipment not expressly
approved by the manufacturer could void the user’s authority to operate this
equipment.
The manufacturer of the end apparatus will, under their responsibility, comply
with the applicable Directives in design and construction.
Safety notices
Safety labels The following safety symbols appear on your NFI touch screen system or
packaging materials:
WARNING
To reduce the risks associated with electrical shock or mechanical function which,
if not avoided, could result in death or serious injury and/or property damage:
Do not use a power cable that is damaged or frayed or a power plug that is damaged.
Do not use a damaged power supply.
Handle the power supply with care.
Do not service the NFI touch screen system. There no user serviceable parts. Refer all
servicing to qualified service personnel.
CAUTION
To reduce the risks associated with glass breakable which, if not avoided, may result
in minor or moderate cut-related injury:
Handle a touch screen with care to avoid breaking the glass. Be aware of cracked or
broken sensors with sharp edges.
CAUTION
To reduce the risks associated with environmental contamination which, if not
avoided, may result in minor or moderate injury and/or cause property damage:
Dispose of components in accordance with local, state, and federal regulations.
Symbol Meaning
Warning: Hazardous voltage
Caution: Item is susceptible to electrostatic discharge
(ESD) damage if proper precautions are not taken.

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Contents
Chapter 1 Overview.......................................................................... 1
Components............................................................................................ 1
Cleaning the touch screen ...................................................................... 2
Chapter 2 Mounting the touch screen............................................ 5
Critical information................................................................................ 5
Steps for mounting an NFI touch screen................................................ 7
TouchSurroundTM underlay (optional).................................................... 8
Chapter 3 Mounting the controller.................................................. 9
Critical information................................................................................ 9
Materials required ................................................................................ 10
Steps for mounting an NFI controller .................................................. 11
Chapter 4 Making connections and resetting the baseline........ 13
Critical information: Connecting the tail ............................................. 13
Steps for connecting tail to controller.................................................. 14
Critical information: Connecting communications and power ............ 16
Steps for attaching power/communications cable................................ 17
Critical information: Resetting the baseline......................................... 18
Steps for resetting baseline................................................................... 18
Chapter 5 Outdoor applications.................................................... 21
Critical information: Integrating with a metal bezel............................ 21
Critical information: Integrating with a plastic bezel........................... 25
Chapter 6 Troubleshooting............................................................ 27
Strategies.............................................................................................. 27
Interpreting the controller’s status lights.............................................. 29
Appendix Standards and certifications........................................ 31

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CHAPTER 1
Overview
This chapter provides:
Description of the components of a typical MicroTouchTM Projected
Capacitive Near Field ImagingTM (“NFI”) touch screen system
Guidelines for cleaning the touch screen
Terms used in the manual
3M contact information
Components The NFI touch screen system includes the following components:
NFI touch screen and tail. The touch screen is available in different sizes
and can be used with most flat panel displays or adapted to fit flat cathode ray
tube displays. The tail connects the touch screen to the controller.

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MicroTouchTM Near Field Imaging (NFI)TM Integration Guide
Touch screen controller. The controller decodes signals on the touch
screen. It has connectors for the touch screen tail and for communications/
power.
Floppy disk with linearization file (does not accompany 8.4-inch
screens). Linearization increases the accuracy of an NFI touch screen and
is required for screens larger than 8.4 inches. For details on linearizing, see
“Steps for resetting baseline”, starting on page 18.
Bar code sticker on the touch screen. The serial number provided on
the bar code stickers correspond to the linearization file that is installed (from
the floppy disk) when setting up the touch screen system.
The bar code sticker on the touch screen helps you to recognize which side
of the touch screen is the front side and which is the back side. If you are
looking at the printed side of the bar code sticker, you are looking at the front
of the touch screen.
You will need the serial number if it is ever necessary to:
Re-install the linearization file.
Contact 3M Touch Systems customer service.
Cleaning the touch screen
Follow these guidelines for cleaning the NFI touch screen:
To clean the touch screen’s back side, blow away dust with pressurized air.
To clean the front of the touch screen, use cleaning solutions and cloths
designed for cleaning coated optical glass (e.g., isopropyl alcohol and water
50:50 solution). Do not use any chemical that corrodes glass. Follow cleaner
manufacturer’s material safety data sheet (MSDS) and follow all instructions
and recommendations on product label.
Apply the cleaner with a soft, lint-free cloth. Avoid using gritty cloths.
Apply the cleaning liquid to the cloth, not directly to the screen.
Terms These terms appear in this manual and may be unfamiliar.
This term Refers to
Baseline An electronic ‘picture’ of the touch screen and its immediate
surroundings. Baseline must be reset after any physical or
mechanical change is made to the NFI touch screen integration
orsystem. With anup-to-date baseline,thetouchscreensystem
performs more accurately and efficiently.
Display area Thepartof the touchscreenthat is positionedover the product’s
display. Touches in the display area emulate the movements
and actions of a mouse.
Continuous frame Gasket material that has no ends.
Metallized bezel Plastic bezel with conductive material applied to its interior.
Near Field Imaging
(NFI) A touch screen that uses a proprietary imaging technique to generate a precise profile of a touch from changes in the
electrostatic field near to the point of contact.
Opaque area A narrow border around the perimeter of the touch screen
(usually silver-grey or black) that does not register touches.
Sometimes called “the guard”.
Touch sensitive area Part of touch screen’s viewing area that will register a touch.
Viewing area The part of the touch screen that is within the opaque area.

Overview
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3M Touch Systems support services
3M Touch Systems provides extensive support services through our website and
technical support organization. Visit the 3M Touch Systems website at
www.3Mtouch.com, where you can download touch screen software and drivers,
obtain regularly updated technical documentation on 3M Touch Systems
products, and learn more about our company.
Whenever you contact Technical Support, please provide the following
information:
Part number and serial number
Current driver version
Operating system used
Information on additional peripherals
Technical Support is available Monday through Friday 8:00 a.m. to 8:00 p.m.
US Eastern Standard Time, 9:00 a.m. to 5:00 p.m. throughout Europe. There is
limited service on Saturdays and Sundays.
You can contact 3M Touch Systems Technical Support (US only — Eastern
Standard Time) by calling the hot line or sending a fax:
Technical Support Hot Line: 978-659-9200
Technical Support Fax: [phone]
Toll Free: 1-866-407-6666
Email: [email protected]
3M Touch Systems worldwide offices
All offices can be reached through the website: www.3Mtouch.com.
Country Telephone
United States 978-659-9000
Australia 61-3-9582-4799
Canada 604-521-3962
France 33-(1)-30-31-68-32
Germany 49-(0)-2131-14-4003
Hong Kong/China 852-2333-6138
Italy 39-(0)-39-230-2230
Japan 81-(4)-4811-1133
Korea 822-552-3198
Singapore 65-6450-8851
Spain 34-934-15-6285
Taiwan 886-2-2704-9011

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CHAPTER 2
Mounting the touch screen
This chapter outlines:
Critical information to help you mount the touch screen successfully.
Step-by-step mounting instructions.
Basic information on the TouchSurroundTM underlay.
If you are integrating the touch screen in an outdoor application:
Using a metal bezel, see additional instructions starting on page 21.
Using a plastic bezel, see additional instructions on page 25.
Critical information
Prevent interference
Mount the touch screen as far away as possible from:
Components (such as radios) that generate a signal in the 50 kHz to 60 kHz
range (unless they are adequately shielded).
AC sources and backlight inverters (unless there is intervening grounded
metal work or shielding).
Observe minimum mounting clearances
Minimum mounting clearances are shown in Table A to help integrators make
mounting decisions that will minimize capacitive loading on the touch screen and
tail. Read Table A while referring to Figure 1 or Figure 2 (whichever figure
applies to your mounting materials).

MicroTouchTM Near Field Imaging (NFI)TM Integration Guide
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Figure 1: Mounting (using metal bezel) with metal clamp (Top View)
Figure 2: Mounting (using metal bezel) with adhesive (Top View)
Table A: Minimum mounting clearances (Use this table with Figure 1 or Figure 2)
CB
A
Metal bezel
Display
Metal clamp
NFI touch
screen
Front Gasket (Non-
conductive)
Spacer (Non-
conductive)
C
A
D
Metal bezel
Display
NFI touch
screen
Front
Adhesive
Screen size
8.4"10.4"12.1"15.0"18.1"
A—Front of touch screen to
inside lip of bezel 0.020" (0.5 mm) 0.020" (0.5 mm) 0.020" (0.5 mm) 0.020” (0.5 mm) 0.030" (0.8 mm)
B—Front of clamp to back of
touch screen 0.020" (0.5 mm) 0.030" (0.8 mm) 0.035" (0.9 mm) 0.045" (1.1 mm) 0.060" (1.5 mm)
C—Display to back of touch
screen 0.060" (1.5 mm) 0.070" (1.8 mm) 0.080" (2.0 mm) 0.100" (2.5 mm) 0.120" (3.1 mm)
D—Side of bezel to edge of
touch screen 0.030" (0.8 mm) 0.030" (0.8 mm) 0.030" (0.8 mm) 0.030" (0.8 mm) 0.030" (0.8 mm)
Viewing area & bezel opening: See NFI touch screen drawings on 3M Touch Systems website: www.3Mtouch.com

Mounting the touch screen
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Observe best practices for different mounting methods
The touch screen can be integrated with either clamps or adhesive:
If mounting with a clamp
Use gaskets between the sensor and clamp and between the sensor and bezel.
Choose gaskets with the following properties:
Non-conductive (with little or, preferably, no carbon content) to seal
gap A in Table A.
Low compression set.
If foam gaskets are required, they should be water resistant (closed-cell and
non-porous). Many neoprene and silicone gaskets have these properties.
Choose non-conductive spacers to achieve the minimum clearances for gap B
(see Table A), or use an air gap.
If you are mounting the NFI touch screen outdoors, refer to Chapter 5.
If mounting with adhesive
Choose adhesives with the following properties:
Non-acidic, neutral pH adhesive such as room temperature vulcanizing
(RTV) adhesives.
You can also integrate the NFI touch screen with closed cell foam with
adhesive on both sides.
Warranty note: If you use an adhesive to mount an NFI touch screen into a bezel,
the touch screen must be detached from the bezel and adhesive to be returned to
3M Touch Systems under warranty.
If your application requires an exceptional seal to prevent moisture or dust
entering the bezel, please see instructions for outdoor applications in Chapter 5.
Steps for mounting an NFI touch screen
For specific information on mounting a touch screen outdoors, refer to Chapter 5.
1. On a protected surface, line up the gasketing or adhesive with the bezel.
Do not allow the bezel and gasket to encroach on any side of the touch
screen’s viewing area by more than 0.020 inches (0.5 mm). Encroaching by
more than that amount may adversely affect the performance of the touch
screen.
2. Check that the minimum clearances have been met for gap A (Table A on
page 6).
3. Position the NFI touch screen on top of the gasketing or adhesive.
4. If you use clamps to integrate the touch screen, then spacers are required to
push the touch screen against the gasket. Align the spacers and install the
clamps and screws according to the instructions provided by the bezel
manufacturer.
5. If the NFI touch screen is integrated with adhesive, follow the instructions
provided by the manufacturer to ensure that the bonding is set correctly.

MicroTouchTM Near Field Imaging (NFI)TM Integration Guide
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TouchSurroundTM underlay (optional)
A TouchSurround underlay can be fitted behind an NFI touch screen (when the
touch screen is larger than the display) to allow part of the touch screen to be used
to define keys such as the ones on a keyboard (Figure 3).
Figure 3: TouchSurround underlay

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CHAPTER 3
Mounting the controller
This chapter provides the following information:
Critical information about mounting the controller. Following the
recommendations in this section will help ensure you are successful in
mounting the controller
Materials required
Step-by-step instructions
Critical information
Ground properly
There is only one correct grounding location on the controller (see
“Grounding Hole” in Figure 4 on page 10) and it must be connected for the
controller to operate correctly.
Extend the grounded metal surface(to which the controller is mounted) by
at least 0.25 inches (6.4 mm) beyond the outline of the controller.
If the controller is above a grounded continuous metal surface, place it
no less than 0.10 inches (2.5 mm) and no more than 0.30 inches (7.6 mm)
from that surface.
Avoid contact with shields
Make sure that nothing touches the top or bottom shields (Figure 5 on
page 11).
Prevent interference
Minimize electromagnetic interference. Specifically, make sure that the
controller is:
Away from sources of noise (e.g., transformers, AC sources, backlight
inverters, and high-voltage switching noise).
As far away as possible from components that generate a signal in the
50 kHz to 60 kHz range (unless they are adequately shielded).
(For guidelines on electrically connecting portable applications, contact “3M
Touch Systems support services” on page 3.)

MicroTouchTM Near Field Imaging (NFI)TM Integration Guide
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Materials required
To mount the NFI controller, the following materials are required:
Screwdriver appropriate for No.4 Phillips or M3 screws
4 No. 4 Phillips (or M3) pan-head screws
Make sure the screw heads are small enough that they do not touch the
circuitry surrounding them (see Figure 5 on page 11 and Figure 6 on
page 11).
4 No. 4 (or M3) compression washers
If compression washers are unavailable, star washers, single coil washers or
shakeproof washers may be substituted. Make sure the washers are small
enough that they do not touch the circuitry surrounding them (see Figure 5
on page 11 and Figure 6 on page 11).
1 grounding wrist strap
Figure 4: Dimensions of controller
0.2" (5.1 mm)0.2" (5.1 mm)
0.2" (5.1 mm)
0.2"
(5.1 mm)
Overall height
0.32" (8.1 mm)
0.2"
(5.1 mm)
0.2"
(5.1 mm) 0.24" (6.1 mm)
5.50" (139.7 mm)
1.53"(38.9mm)
3.77" (95.8 mm)
5.10" (129.5 mm)
2.75"
(69.9 mm)
0.125" (3.2 mm) Dia.
all holes
Plan view
Side view
Grounding
hole
Shield
Shield
Shield
2.35"
(59.7 mm)
Do not touch shields with grounding wire.
They are not grounded. If shields touch grounded
metal work, the controller will malfunction.
Critical
There is only one grounding location and it must be connected for the controller to operate
correctly (See Figure 5 on page 11).

Mounting the controller
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Steps for mounting an NFI controller
1. The components on the NFI controller are sensitive to damage from
electrostatic discharge (ESD). To prevent damage from ESD, put on a
grounding strap, connect to ground, and touch a grounded object to
discharge any built-up static.
2. Locate the mounting holes on the NFI controller (Figure 5).
Figure 5: Controller’s mounting holes, grounding/mounting hole
3. Insert the screws and washers into the mounting holes. Take care to not short
out the surrounding circuitry with either the screws or washers. Tighten the
screws so that the controller is firmly in place and the washers will not
move.
Figure 6: Mounting controller
Do not use metal fasteners that could touch and
short out the surrounding circuitry or plated holes.
90075_2003

MicroTouchTM Near Field Imaging (NFI)TM Integration Guide
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4. Ground the controller. 3M Touch Systems recommends grounding the
controller using a ground screw through a metal stand off (Figure 7). If the
stand off is not grounded, attach a grounding cable (Figure 8).
Figure 7: Grounding controller using stand off
Figure 8: Grounding controller using cable
5. Make sure that the grounding cable, compression washer and metal
grounding screw do not touch or short out the surrounding circuitry.
Metal grounding
screw
Controller
Metal compression
washer
Grounded stand off
90076_2003_a
To achieve grounding, useonly
grounding screw hole.
Grounding screw hole
Grounding screw hole
Metal grounding
screw
Controller
Metal compression
washer
90077_2003
Grounding cable
To achieve grounding, useonly
the grounding screw hole.

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CHAPTER 4
Making connections and resetting the
baseline
This chapter provides the following information:
Critical information and steps for connecting the NFI touch screen tail.
Critical information and steps for connecting power/communications.
Critical information and steps for resetting the baseline.
Critical information: Connecting the tail
The touch screen tail connects the touch screen to the controller. The following
tail connection practices are essential for achieving a successful integration.
Prevent interference
Position the tail and controller away from:
Components that generate a signal in the 50 kHz to 60 kHz range (unless
components are adequately shielded).
AC sources (such as backlight inverters) and high-voltage switching
noise. If this is not possible, make sure the AC or noise source is
appropriately shielded and grounded.
Conductive surfaces — at least 0.10 inches (2.5 mm) away.
If the tail must run along a large conductive metal surface, keep it at least
0.10 inches (2.5 mm) from the surface and make sure that it cannot move
(e.g., by using an adhesive foam spacer).
Bending and position the tail properly
Do not bend the tail past a radius of 0.100 inches (2.5 mm). The tail can be
damaged and the touch screen may not operate correctly if it is severely
creased.
To provide extra protection for the touch screen tail, consider wrapping the
entire tail in an insulator (i.e. foam or nylon).
If the tail wraps around a sharp edge in your product, use an insulator on
the edge of the surface to prevent chafing.

MicroTouchTM Near Field Imaging (NFI)TM Integration Guide
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Figure 9: Using an insulator if tail wraps around a sharp edge
Steps for connecting tail to controller
To connect the touch screen tail to the controller:
1. Put on a grounding strap, connect to ground, and touch a grounded object to
discharge any built-up static on your body.
2. Place the touch screen on a non-conductive surface (e.g., cardboard). Make
sure the side of the touch screen with the bar code visible is face up.
3. Remove the controller from its ESD-protected plastic envelope. Make sure
that the major electronic components are face up.
4. Use two fingers to gently pull out the retaining clip so that it protrudes
slightly from the controller’s connector. To protect the retaining clip from
damage, do not remove it completely (Figure 10).
Figure 10: Pulling out retaining clip from touch screen connector on
controller
90085
Touch screen tail
Use insulator to protect tail
wrapped around sharp edge
Bend radius 0.100"
(2.5 mm)
At least 0.100" (2.5 mm)
between tail and a surface
that is conductive
90010_2003
Pull out clip just enough so it
protrudes slightly from connector