Automation System
Stepping motors:

All of these
can be built to index different amounts by changing the pole configuration
do not require commutators
can run at varying speeds
can run both clockwise and counterclockwise

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Automation System
The robot:

will be more useful when robot vision is improved significantly
None of these
is very primitive at the present
represents the most powerful new industrial automation tool currently on the horizon
All of these

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