As mentioned in previous posts on this thread, a robot here sounds like a gimmick. There are I'm sure better assembly-line dedicated machines for flipping burgers. The only advantage here with the robot is the restaurant doesn't have to change their equipment.
As far as economics go, I'm sorry but the cost of a human burger flipper is still so cheap that it makes absolutely no sense to purchase a robot and have to deal with all the trouble it is likely to cause.
I think minimum wage in USA was $7-8 a while back, now maybe $10/hour? That human is running around flipping, putting together the sandwich, cleaning, doing a whole bunch of other jobs. If you hired a robot, you would still need a human to service the robot, do the cleaning, stack the sandwiches, cut up ingredients or put burgers on the burner, etc.... You aren't going to save anything!
I call Gimmick for this one... I can't imagine I would go to a vending machine or robot-restaurant just to save a few pennies on the food, if even!
Then again, there is this Robot Restaurant I would probably want to check out (only in Japan)
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