=+3. Figure 5.32 illustrates a machining cell which consists of two identical machining centres and a robot. The robot serves the two machining centres by loading and unloading them respectively at the start and the end of a machining operation. Draw an activity cycle diagram to describe this discrete manufacturing system. (Hint: first draw the activity cycle of the machines, then draw the activity cycle of the robot. and finally integrate these through their common activitites.)

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WORKPIECES III

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LOADING/UNLOADING STATION

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"- "- "- '-

(MACHINE ,)

ROBOT