Automation System
Light sensors:

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

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

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

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