There are two aspects to the pickup tower: 1) Entering/scanning an order number causes the robot to fetch the packages (plural) in question and deliver to an a

There are two aspects to the pickup tower: 1) Entering/scanning an order number causes the robot to fetch the packages (plural) in question and deliver to an area for the recipient to pickup. This has the effector/sensors that you mention above. 2) Entering/scanning an order number causes the robot to tell the recipient to go to a given locker and it also pops open said locker. When the recipient picks up the packages from the locker and closes the same, the main screen acknowledges the pickup. If I appear to be gushing, it is because I am darned impressed by this thing. I am not kidding when I say that it works very well. I found a video that hopefully demonstrates the technology better than my stilted write-up above: https://www.youtube.com/watch?v=71pgd-LzzXc https://www.youtube.com/watch?v=71pgd-LzzXc .