Mounting The Touchscreen - Elo TouchSystems IntelliTouch Ultra Product Manual

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Chapter 4 - Component Installation Chapter 4 - Component Installation
M M
OUNTING THE OUNTING THE
It is often necessary to cut ribs and struts inside the bezel. Cutting does not It is often necessary to cut ribs and struts inside the bezel. Cutting does not
usually cause difficulties although the stiffness of the bezel may be reduced usually cause difficulties although the stiffness of the bezel may be reduced
slightly. Try not to cut into the posts for the CRT attachment screws. Bezel slightly. Try not to cut into the posts for the CRT attachment screws. Bezel
and tube combinations that require this cut are rare. and tube combinations that require this cut are rare.
Generally, a total clearance between the edge of the touchscreen and any ribs Generally, a total clearance between the edge of the touchscreen and any ribs
or struts of at least 0.25-inch (6 mm) in both axes is necessary. This prevents or struts of at least 0.25-inch (6 mm) in both axes is necessary. This prevents
the interference fit problem discussed above and allows for variation in touch- the interference fit problem discussed above and allows for variation in touch-
screen mounting position. screen mounting position.
The potential interference between the degaussing coil and the touchscreen The potential interference between the degaussing coil and the touchscreen
must also be evaluated. The coil will usually fit between the touchscreen and must also be evaluated. The coil will usually fit between the touchscreen and
the inside surface of the bezel, as there is typically a natural cavity for it. If the inside surface of the bezel, as there is typically a natural cavity for it. If
there is not enough space for the coil, you may have to provide additional there is not enough space for the coil, you may have to provide additional
setback for the CRT. It may also be possible to relocate the coil to the bell side setback for the CRT. It may also be possible to relocate the coil to the bell side
of the CRT. Normally, this does not significantly reduce the coil's effective- of the CRT. Normally, this does not significantly reduce the coil's effective-
ness. However, you must determine this by inspecting the display for color ness. However, you must determine this by inspecting the display for color
problems after reassembly. problems after reassembly.
Check for adequate clearance of the transducers and the cable from the bezel Check for adequate clearance of the transducers and the cable from the bezel
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structure. If the position of the cable causes difficulty, the touchscreen may be structure. If the position of the cable causes difficulty, the touchscreen may be
rotated 180 rotated 180 . The preferred orientation of the IntelliTouch touchscreen is with . The preferred orientation of the IntelliTouch touchscreen is with
° °
the cable exiting from the right side, when viewed from the front of the the cable exiting from the right side, when viewed from the front of the
display. Rotation will cause an inversion of the output coordinates, which will display. Rotation will cause an inversion of the output coordinates, which will
be compensated for automatically by Elo driver software, but perhaps not by be compensated for automatically by Elo driver software, but perhaps not by
other drivers. (Flat touchscreens should have the reflector stripes on the side other drivers. (Flat touchscreens should have the reflector stripes on the side
facing the user.) facing the user.)
T T
OUCHSCREEN OUCHSCREEN
When preparing the touchscreen for mounting to the CRT, major considerations When preparing the touchscreen for mounting to the CRT, major considerations
are: are:
Reasonable mechanical alignment with the display. Reasonable mechanical alignment with the display.
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Mounting materials and methods that do not put surface wave-absorbent Mounting materials and methods that do not put surface wave-absorbent
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substances, such as duct tape, RTV caulks, or soft foam gaskets in contact substances, such as duct tape, RTV caulks, or soft foam gaskets in contact
with either the touch active area of the glass or with the reflector stripes. These with either the touch active area of the glass or with the reflector stripes. These
materials can be used if they contact the back side of the touchscreen or the materials can be used if they contact the back side of the touchscreen or the
glass outside the touch active area and the reflector stripes. glass outside the touch active area and the reflector stripes.
• • A complete dust seal between the touchscreen and the CRT. A complete dust seal between the touchscreen and the CRT.
A mounting technique that evenly supports the touchscreen on at least two A mounting technique that evenly supports the touchscreen on at least two
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opposite edges. Elo recommends double-sided tape between the touchscreen opposite edges. Elo recommends double-sided tape between the touchscreen
and the CRT. and the CRT.