Automation System
Stepping motors:

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

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Automation System
The robot:

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

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