In the previous problem, suppose that a double gripper is used instead of a single gripper as indicated in that problem. The activities in the cycle would be changed as follows:

Steps 1, 4, and 5 are performed simultaneously with the automatic machining cycle. Steps 2 and 3 must be performed sequentially. The same tool change statistics and uptime efficiencies are applicable. Determine the hourly production rate when the double gripper is used, taking into account the lost time due to tool changes and the uptime efficiency.

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Seq Activity Time Robot reaches and picks raw part from incoming conveyor in one gripper and awaits completion of machining cycle. This activity is performed simultaneously with machining cycle 2 At completion of previous machining cycle, robot reaches in j.з sec 5.0 sec. retrieves finished part fom machine, loads raw part into fixture and moves a safe distance from machine 3 Machining cycle (automatic) 4Robot moves to outgoing conveyor and deposits part. This activity 3.0 sec 33.0 sec. is performed simul taneously with machining cvcle 5 Robot moves back to pickup position. This activity is performed 1.7 sec. simultaneously with machining cycle