Automation System
Stepping motors:

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

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

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

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Automation System
The use of specialized workstations:

provides limited growth potentials for 3-D
reduces the host computer workload and allows more users
None of these
has a high cost-performance tradeoff
reduces the host computer workload

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Automation System
A sequence controller:

is no longer in widespread use
is a mechanical only controller
performs on/off control functions in relation to time.
None of these
is difficult to program

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