Consider the following four-machine robotic cell. Let the processing times for t

Question

Consider the following four-machine robotic cell. Let the processing times for the machines be M1=10 min, M2-7 min, M3-4 min, M4-15 min , the travel time between any consecutive machines be ? 0.3min, and load/unload time be ? 0.2min. Consider the travel times as additive. a) Determine the lower bound on cycle time for this robotic cell. b) Draw the activity diagrams and the state-spaces of the robotic cell and determine the cycle times for the three cycles: forward, reverse, and a pyramidal one (Ao, A1, A4, A3, A2) M3 M2 M1 M4 Robot input output

Explanation / Answer

Processing Timings

M1=10min,M2=7min,M3=4min ,M4=15 min.

So minimum among them is M3.

Travel time=0.3min

Load unload time=0.2 min

Hence lower bound on the cycle time be=0.2+0.3+4=4.5min.

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