Automation System
The "walk-through" method of programming a robot involves:

All of these
moving the robot from one location to another
physically moving the robot through all the motions it is to repeat
None of these
walking through your suggested procedure with your supervisor prior to programming

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Automation System
Light sensors:

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

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