FAQs
3 Critical Points
- Ensure the sensor is orientated the correct way with the front of the sensor being clearly
defined with a “view face” label (glass side is facing the user).
- The spacing between the Display and the rear of the Touchscreen should be at least
3 mm.
o Up to 15” -> 3 mm
o Up to 19” -> 5 mm
o Bigger diameters -> 6 mm
- This 3 mm spacing should be created using a double sided adhesive gasket (i.e. VHB tape
or some form of foam gasket). Layers of gasket may have to be built up to obtain the
required spacing. The important point here is that even under compression the uniform
spacing should remain at least 3 mm.
- Once the gasket has been fitted, the touchscreen should be secured on top of the gasket.
- Make sure that the active area of the touchscreen is aligned with the viewable area of the
Display and that there is no excessive flexing or mechanical movement between the
touchscreen and the Display.
- If a front bezel is to be fitted then this also must be spaced off the front of the
touchscreen using a 3 mm double sided adhesive gasket. This 3 mm gasket can be
applied directly to the edges of the touchscreen and the spacing must be maintained even
under compression.
- For metal bezels that are fitted to the front of the touchscreen, the installer must ensure
that no metal work is directly touching the surface of the touchscreen or active area.
- Ensure that the front metal bezel and all metal work are correctly earthed to a known
common earth point using earthing straps.
- Ideally the front metal bezel aperture should be a few millimetres wider all round than the
active area of the touchscreen. It is also recommended that the software that is to be
executed in the final application should have all critical activation buttons placed at least
10 mm in from the edge of the active area of the touchscreen, as illustrated in Figure 4.
Activation buttons should also be made a significant size for ease of use by the user.
Avoid placing critical activation buttons in extreme corners or edges of the touchscreen
active area.
- Having worked through this user manual and installed and set up the software, if the
system appears to be “noisy” i.e. the mouse pointer displays an unwarranted amount of
random mouse pointer movement with no applied touch, then experimentation may need
to be carried out with the spacing between the Display and touchscreen or touchscreen
and metal work, i.e. the spacing may need to be increased.
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