Automation System
Robots consist of three basic components; power supply, control (memory) console, and:

microcomputer
None of these
software
mechanical unit (arm)
coaxial cable

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Automation System
A stepping motor;

has a speed proportional to voltage input
has a commutator
is a good choice where continuous rotation is needed
can index positional movement.
None of these

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Automation System
Direct Numerical Control means:

eliminating computers from the manufacturing process
using several computers to control one large machine
complete elimination of a need for a human operator.
None of these
using one computer to control several machines

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