Psion Teklogix OMNii HDK XT10, User Manual

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Chapter 5: Mechanical Considerations
End-Cap Modules and Devices
66 Psion Teklogix Omnii HDK User Manual
5.4.2 End-Cap Modules and Devices
This section describes the specifics of designing and mounting devices for the end-cap area of the
Omnii expansion back cover.
Designing End-Cap Modules
The 3D CAD model of the expansion back cover shows the precise shape and size of the end-cap
opening, so that an end-cap module can be constructed to fit with precision.
To maintain proper protection against water and dust ingress, end-cap modules must form a tight
seal with the back cover. A soft overmould around the perimeter of the opening is used to create a
seal with the attached end-cap. The end-cap module must be designed with a corresponding hard
ridge that presses into the overmould to form this seal. The 3D CAD model of the standard end-
cap can be used to obtain the required width, depth and shape of this ridge.
Table 5.5 Associated Files for End-Cap
Description Filename
2D line drawings of the auto-range standard back cover with loca-
tions of mounting points for the back cover and pistol grip Back_Cover_Expan_2D.dwg
Back_Cover_Expan_2D.pdf
3D CAD models of the expansion back cover, showing end-cap
and pod expansion openings with sealing overmoulds, and keep-
away areas for camera and speaker options Back_Cover_Expan_3D.igs
Back_Cover_Expan_3D.stp
2D line drawings of the end-cap with GPS antenna Endcap_GPS_2D.dwg
Endcap_GPS_2D.pdf
3D CAD models of the end-cap with GPS antenna Endcap_GPS_3D.igs
Endcap_GPS_3D.stp
2D line drawings of the standard end-cap Endcap_Standard_2D.dwg
Endcap_Standard_2D.pdf
3D CAD model of the standard end-cap Endcap_Standard_3D.stp
Table 5.6 Required Fasteners
How Used Quantity Part Number Screw Size Torque
(in-lb)
Bit
End-Cap to Main Housing 4 1004948 M3x6 5.0 T10
Back Cover to Main Housing (Back) 8 1004948 M3x6 5.0 T10
Back Cover to Main Housing (Front) 2 1004946 M2x8 2.5 T6