3M MicroTouch Near Field Imaging (NFI) Integration Manual - page 13
Mounting the touch screen
3M Touch Systems Proprietary Information
7
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
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.