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

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

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Automation System
The SKETCHPAD system

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

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Automation System
A dc servo motor:

uses a variable dc voltage for speed control
None of these
can provide precise position control
uses a tachometer for speed feedback
All of these

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