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
None of these
there is better coordination in the materials-handling area
tool motions can be checked to see if there is interference between the tool and the object

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Automation System
Time proportioning control:

cannot use a TM990 micro¬computer
can be used on a PM550 programmable process controller
is less efficient than normal PID control
None of these
a and b above.

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