Page 1
MicroTouch ClearTek ™ ™ Integration Guide 3M Touch Systems Read and understand all safety information contained in this document before using this product. 3M Touch Systems Proprietary Information...
Page 2
3M Touch Systems, Inc. warranty, then 3M Touch Systems, Inc. sole obligation and User’s and Purchaser’s exclusive remedy, will be, at 3M Touch Systems, Inc. option, to repair or replace that Product quantity or software media or to refund its purchase price.
Electrical Considerations..................13 Mechanical Considerations ..................15 Touch System Location....................17 Designing Software Applications................18 Chapter 3 Installing a 3M Touch Systems Touch Screen Installation Considerations ..................21 Disassembling the Display ..................22 Fitting the Touch Screen ..................23 Mounting the Touch Screen to the LCD Panel ............24 Inspect the Mounted Touch Screen ................27...
Page 4
Mounting the Touch Screen Controller Internally ...........33 Completing Controller Mounting................34 Powering the Touch Screen Controller ..............35 Locating Power for the Touch Screen Controller.............36 Modifying the Display for the Controller Cable ............37 Using Your 3M Touch Systems Touch Screen ............38 3M Touch Systems Proprietary Information...
About This Manual Congratulations on the purchase of your MicroTouch™ ClearTek™ II touch screen and welcome to the world of 3M Touch Systems — a world where using a computer is as simple as touching the screen. The ClearTek™ II touch screen, 3M Touch System’s innovative design for flat capacitive touch screens, incorporates advanced production techniques that result in high quality capacitive touch screens.
CAUTION: Indicates a potentially hazardous situation, which, if not avoided, may result in property damage. DANGER To avoid the risk of fire and/or explosion which will result in serious injury or death: • Do not install or use this product in a hazardous location. 3M Touch Systems Proprietary Information...
Data Sheet and product label. To avoid possible environmental contamination which may result in minor or moderate injury: • Dispose of the monitor according to applicable governmental regulations. Explanation of Symbols Attention: Read accompanying documentation 3M Touch Systems Proprietary Information...
Technical Support is available Monday through Friday 8 a.m. to 8 p.m. US Eastern Standard Time – 9 a.m. to 5 p.m. throughout Europe. You can contact 3M Touch Systems Technical Support (US only -- Eastern Standard Time) by calling the hot line, sending email or a fax.
CHAPTER 1 Getting Started The 3M Touch Systems touch screen is the most intuitive interface available for the PC today. Touch screens make using computers as simple as touching the screen. To begin installing your 3M Touch Systems touch screen, take a few minutes to review this chapter.
3M Touch Systems recommends an area of at least three square feet. You need this space to handle components safely and to set major components aside during the installation.
If the display is functioning properly, turn off your system, disconnect power plugs, and disconnect all cables from the display. You are ready to disassemble the display and install the touch screen. 3M Touch Systems Proprietary Information...
If you decide to use external power, you will need a power supply. If you are using a standard 3M Touch Systems RS-232 serial cable (P/N 7310101), or a cased EX II 1700SC controller, consult your applications engineer for power supply specifications.
EX II controllers default to a frequency (95.7 kHz) selected for best rejection of common LCD frequencies. Refer to the MT7 Software User Guide for additional information on how to change frequency. All technical documentation is available from the 3M Touch Systems website at http://www.3Mtouch.com/. 3M Touch Systems Proprietary Information...
Page 14
3M strongly recommends that customers use a properly grounded CRT faceplate on all touch screen monitor integrations to prevent damage to the touch screen and/or controller.
Apply tape or other insulating material to sharp edges to protect the tail. Route the cable away from sharp edges whenever possible. 3M Touch Systems Proprietary Information...
Page 16
We recommend using nonacidic, pH neutral 3M brand tapes to seal your bezel and touch screen. 3M foam tapes provide superior resistance to moisture and chemicals over other traditional cellular foam tapes.
Chapter 2 Touch Screen Design Considerations Note: 3M VHB acrylic foam tapes (Product Numbers 4956, 4956F, or 4979F) are well suited for this purpose. These tapes were chosen for their thermal properties. The typical Thermal Coefficient of Expansion for these tapes is 1.8 X 10E4 mm/mm/°C.
1 inch, the active touch area behind it could be 2 inches x 2 inches. • Keep buttons away from the edges and corners of the screen. If this is impossible, make sure the active touch areas extend to the outer edges of the viewing area. 3M Touch Systems Proprietary Information...
Page 19
Turn off the cursor. Users may inadvertently try to drag the cursor to the correct location on the screen, emulating moving a mouse, instead of touching the button directly. • Design your applications to work with a single touch to activate rather than a double- touch. 3M Touch Systems Proprietary Information...
CHAPTER 3 Installing a 3M Touch Systems Touch Screen This chapter describes how to install a 3M Touch Systems touch screen in a flat display. You can install a 3M Touch Systems touch screen on many different flat displays. •...
2. Lift off the rear housing to expose the display chassis. Remove any screws holding optional accessories (such as speakers or control buttons). 3. Remove the screws that secure the chassis to the front bezel. Carefully lift the chassis off the front bezel and set the bezel aside. 3M Touch Systems Proprietary Information...
Chapter 3 Installing a 3M Touch Systems Touch Screen Fitting the Touch Screen The sealing gasket and mounting tape add approximately 1/16 to 1/8 inch (1.587 to 3.175 mm) and the touch screen adds approximately 1/8 inch (3.175 mm) to the thickness of the display assembly.
Note: For ease of maintenance, you might want to put a border of Kapton® tape (or a similar strength tape) around the perimeter of the LCD panel in order to provide a surface to adhere the 3M mounting tape that will be easy to remove if the need arises. 3M Touch Systems Proprietary Information...
Page 25
Chapter 3 Installing a 3M Touch Systems Touch Screen Strips of high-density foam mounting tape (3M Product Numbers 4956, 4956F, or 4979F) with adhesive on both sides should be used to attach the touch screen to the LCD metal frame. These strips should not form a full seal – allow for ventilation (1-2 mm gaps) at the corners as shown above.
Page 26
Typically, an isopropyl alcohol and water solution ratio of 50:50 is the best cleaning agent for your touch screen. You can also use straight isopropyl alcohol. In addition, 3M Touch Screen Cleaner CL680 has been tested and approved for this use. Be sure to follow solvent manufacturer's precautions and directions for use when using any solvents.
Chapter 3 Installing a 3M Touch Systems Touch Screen 2. Apply strips of the double-sided acrylic foam tape (3M VHB 4956) around the perimeter of the LCD panel. Refer to the Mechanical Considerations section in Chapter 2 for additional details.
Following is an example of adding spacers to the bezel to accommodate the extra space created by the touch screen. In this example, assume a sealing gasket, mounting tape, and a touch screen. 3M Touch Systems Proprietary Information...
Page 29
4. Adjust the LCD panel so that it is centered in the bezel and remove the temporary posts. 5. Select a replacement screw for the factory-installed bezel screws. 3M Touch Systems recommends that you replace the factory LCD panel screws with longer screws to accommodate the sealing gasket and touch screen thickness and prevent the glass from breaking by forcing too short screws to work.
2. Lay the touch screen flex tail along the outside area of the chassis. Avoid contact with internal electronics that can affect the touch screen performance. Do not route the touch screen flex tail near the backlight inverter of the LCD panel. 3M Touch Systems Proprietary Information...
Connecting the controller to the computer Types of Touch Screen Controllers There are different 3M Touch Systems controllers that can be used to operate your touch screen. The most common types are the EX II 1700SC and EX II 7700SC series serial capacitive controllers, and the EX II 5700UC and EX II 7700UC series USB controllers.
Most LCD display manufacturers connect the major components with detachable cables that have keyed connectors and labels. In addition, cables are of such lengths that they usually connect to only one place. However, not all displays 3M Touch Systems Proprietary Information...
Additional space will also be needed between the controller board and the metal shield to prevent shorting of the board. Figure 1. EX II 1700 and 5700 Dimensions Figure 2. EX II 7700 Dimensions 3M Touch Systems Proprietary Information...
Usually it is necessary to make a hole in the shield and the housing so that the touch screen cable can be routed through, however some models may have an existing opening that can be used. Routing holes 65-2410 3M Touch Systems Proprietary Information...
Pin 1: GND RTN power): Pin 2: 5VDC to 12VDC External power option Power input locations: Auxiliary plug on the RS-232 connector of controller cable. Connections: None required Controller must be properly grounded through the mounting holes. 3M Touch Systems Proprietary Information...
4. Measure voltage across the power source again The difference in voltages before and after the wires were connected cannot exceed 100 mV. If this voltage drop is exceeded, you must find a different tap point location. 3M Touch Systems Proprietary Information...
Note: When routing the touch screen flex tail through the metal shield and rear display cover, be careful to avoid the inverter and other high noise sources. 2. Align the display cover for reattachment to the chassis and thread the controller cable through the hole. 3M Touch Systems Proprietary Information...
Both MT 7 and TouchWare software include the touch screen driver and control panel that enables your touch screen to work with your computer. When you install this software, the correct driver for your system will automatically load. 3M Touch Systems currently supports touch screen drivers for the following PC operating systems: •...
Need help?
Do you have a question about the MicroTouch ClearTek II and is the answer not in the manual?
Questions and answers