Robotic cells

A robot cell, comprising:

• a cell floor defining an array of nodes corresponding with a predetermined two-dimensional coordinate system and defining a volume for receiving a workpiece therein, the cell floor being accessible by a human operator;
• a set of robots, including a first robot, each robot in the set of robots having a respective base, an end effector, and a working envelope, and defining a respective three-dimensional coordinate system, located according to the array of nodes;
• a set of detectors, including a first detector, the set of detectors being configured to detect respective re-locations and/or re-bearings of the set of robots using a set of targets disposed on and/or in the cell floor;
• a safety system configured to alert the human operator, said safety system comprising a set of visual alerts provided in and/or on the cell floor and configured to indicate a safe path for the human operator;
• and
• a controller, communicatively coupled to the set of robots, to the set of detectors, and to the safety system, the controller being configured to:
• accept information from the set of detectors regarding the re-locations and/or re-bearings of the set of robots;
• according to the re-locations and/or re-bearings of the set of robots, determine changes of the respective working envelops of the set of robots;
• and
• according to the changes of the working envelops of the set of robots, selectively enable or disable the visual alerts, so as to make two-dimensional changes to the safe path the safe path being thereby rerouted to avoid the changed working envelopes of the set of robots.