Automation System
A common data base is one requisite for converting CAD and CAM to CIM. Another is that:

None of these
the system must make provision for new techniques.
the user must have access to both hardware and software
technical assistance must be provided to the user.
there should be a common 3-D part description system.

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Automation System
Light sensors:

come in a wide variety of mounting styles
never use infrared light as light source
None of these
cannot be used a s limit switches.
work in direct sunlight

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