It’s 10:40 on a Monday. A pallet is parked in the cross-aisle, the tugger route feeding your pack stations has stopped, and someone on the floor is asking whether warehouse AMRs would have just driven around it.<\/p>\n\n\n\n
They would have. An autonomous mobile robot (AMR) is a self-navigating vehicle that carries loads through a facility using onboard sensors and a software map, with no tape, wire or rails on the floor. When an aisle is blocked, it plans another way through. Most mobile robots built for live aisles<\/a> can do this today.<\/p>\n\n\n\n The harder question is whether that rerouting still works at 2 p.m. on your peak day, when the whole fleet is rerouting at once. That depends far more on the fleet software than on the robot, and this post covers how to test it before you buy.<\/p>\n\n\n\n A fixed-path system, whether a conveyor run or an automated guided vehicle (AGV) following wire, tape or magnets, does one route very well. Its cycle times are predictable because nothing about the route is negotiable. That is also how it fails. An AGV that meets a stray pallet stops and waits for someone to clear it. A new pick zone or a re-slotted fast-mover area means re-laying floor markers and reprogramming routes, which usually means downtime and a contractor.<\/p>\n\n\n\n For an operations manager, the cost shows up in two places: the minutes lost each time a person walks over to clear a path, and the layout changes you quietly stop proposing because the floor work isn’t worth it.<\/p>\n\n\n\n An warehouse AMR maps the facility with laser scanners (LiDAR) and cameras, then uses simultaneous localization and mapping (SLAM) to place itself on that map in real time. Operators teach pickup and drop-off points through the robot interface and set speed zones, preferred lanes and restricted areas. When a forklift or a person blocks the planned path, the robot recalculates around it or holds until the lane clears.<\/p>\n\n\n\n Addverb’s Dynamo robotic pallet mover<\/a> works this way, moving loads of up to 3,300 lbs at up to 4.9 ft\/s. The practical consequence is that moving a pick zone is a change made in software, over a shift change, with no floor work.<\/p>\n\n\n\n Also Read: Fixed and Flexible Automation: Intersecting Efficiency with Scalability<\/a><\/p>\n\n\n\n Rerouting is a local decision. One robot sees one blocked aisle and takes the next-best path. At 9 a.m. with six robots running, that is enough. At peak, with the fleet doubled and forklifts working the same cross-aisles, every local decision pushes traffic into another robot’s route. Twenty robots each choosing their own next-best path can build a jam nobody planned.<\/p>\n\n\n\nTakeaways<\/h2>\n\n\n\n
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Why do fixed paths break down when the floor changes mid-shift?<\/h2>\n\n\n\n
How do warehouse AMRs navigate without a fixed route?<\/h2>\n\n\n\n
What happens when the whole fleet is rerouting at once?<\/h2>\n\n\n\n