Psion Teklogix OMNii HDK XT10, Руководство пользователя

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Chapter 5: Mechanical Considerations
Pod Expansion Modules and Devices
Psion Teklogix Omnii HDK User Manual 69
Designing Pod Expansion Modules
The 3D CAD model of the expansion back cover shows the precise shape and size of the pod
opening, so that a pod expansion module can be constructed to fit with precision.
To maintain proper protection against water and dust ingress, pod expansion 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 pod. The pod expansion module must be designed with a
corresponding hard ridge that presses into the overmould to form this seal. The 3D CAD model
included with the HDK of the standard scanner pod can be used to obtain the required width, depth
and shape of this ridge.
Figure 5.3 Pod Expansion Overmould
Pod expansion modules are attached to the expansion back cover with four M3 screws. The pod
expansion module must be designed with holes for these four screws, to be torqued to 5 in-lb
(0.56 N-m) in order to maintain a proper seal.
Figure 5.4 Location of Pod Expansion Mounting Points
Expansion
Device
Main
Housing
Overmould
Ridge
units = mm