Automation System
The SKETCHPAD system

All of these
None of these
consisted of an cathode-ray oscilloscope driven by a Lincoln Tx2 computer where by graphical information was displayed on the screen.
is used for interactive Graphics
is expensive because it is sophisticated and make demands on the power and resources of the computer.

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Automation System
Direct Numerical Control means:

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

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Automation System
One of the major benefits of using CAD in tool design is that:

product design represents approximately one-half the engineering costs
it simplifies the trial-and-error method
tool motions can be checked to see if there is interference between the tool and the object
there is better coordination in the materials-handling area
None of these

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Automation System
Light sensors:

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

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