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Pick and Place Robots in Warehouses: Fixed Cells vs. Mobile
Pick and place robots in warehouses: what they are, how fixed cells differ from mobile robots, where each fits, and what to test before you commit.
6 min read
· Updated
November 2026
At a glance
The definition
A pick and place robot is a manipulator, usually a robot arm with a gripper, that moves items from one location to another, guided by fixed positions or vision.
Fixed or mobile
Fixed cells wait for items to arrive by conveyor or storage system. Mobile robots put the arm on a wheeled base and drive to shelves, carts, and stations.
What to test
Motion is the easy part. Test grasp success, errors, damage, and exception handling on your own SKUs and bins, and judge results by accepted picks, not attempts.
Pick and place robots are programmable manipulators, usually robot arms with grippers, that pick an item from one location and place it in another, guided by fixed positions or by vision. In warehouses, they work either in fixed cells fed by conveyors or on mobile bases that travel to the work.
Transfer tasks fill a warehouse shift: tote to sorter, bin to carton, shelf to order tote. They are repetitive, hard to staff on nights and weekends, and easy to get wrong late in a shift. Pick and place robots are the obvious candidate, but a demo with neat items on a table rarely looks like your bins, and a robot that needs help every few minutes does not save labor.
This guide explains what a pick and place robot is, how fixed cells differ from mobile robots, where each works in a warehouse, and what to test before you buy. For arm types and specs, see robot arms in warehousing. For the wider technology landscape, see robotic picking systems.
What counts as a pick and place robot
Pick and place is an application, not a robot type. The International Federation of Robotics, following ISO 8373, defines an industrial robot as an automatically controlled, reprogrammable multipurpose manipulator, programmable in three or more axes, which can be fixed in place or fixed to a mobile platform. Any such robot that grasps an item and puts it somewhere else is doing pick and place.
Manipulator. An articulated arm, SCARA, delta, or gantry robot that provides reach and motion.
End effector. The gripper, such as suction cups, fingers, or a combination, which decides which items the robot can hold.
Perception. Fixed positions and fixtures work when items always arrive the same way. Mixed items in bins usually need cameras and 3D vision to find a grasp point.
Software and integration. Grasp planning, error recovery, and the connection to your WMS, conveyors, and safety system.
Robot adoption keeps rising, and not only in factories. The United States installed 38,400 industrial robots in 2025, up 12%, and the IFR named warehousing and logistics among the sources of that growth.
Why warehouse picking is harder than factory pick and place
In a factory, parts usually arrive in known positions, so a robot can repeat the same motion all day. A warehouse is the opposite: thousands of SKUs, random orientation in bins, polybags, shrink wrap, and a steady stream of new items. When teams in the first Amazon Picking Challenge had to pick mixed products from warehouse shelving, the analysis found a clear trend toward suction, and items such as a metal mesh pencil holder and foam balls gave suction trouble.
The lesson for buyers: the hard part is perception, grasping, and recovery when a pick fails, not arm speed. Ask about grasp success on your SKUs before you ask about cycle time.
SKU fit check
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Fixed pick and place cells
A fixed cell bolts the robot to the floor or a pedestal, and items come to it by conveyor, storage system, or tote. Common warehouse uses include:
Goods-to-person stations. The robot picks from a storage tote into an order tote at the port of an AS/RS or cube storage system.
Sorter induction. The robot singulates parcels or items onto a sorter. See sortation machine induction robots.
Packing and bagging. The robot places items into cartons or mailers. See robotic packing systems.
Palletizing and depalletizing. The robot builds or breaks down pallets of cases.
Fixed cells deliver steady throughput at one point, and the safety approach for robot cells is well established. In the U.S., ANSI/A3 R15.06-2025 adopts ISO 10218 Parts 1 and 2 for industrial robots and robot cells, with integrated guidance for collaborative applications and new content on end effectors. The trade-off is that a fixed cell needs a feed. If items are not already flowing to one spot, you have to build conveyors or a storage system to bring them there, and moving the cell later is a project.
Mobile pick and place robots
A mobile pick and place robot puts the arm on a wheeled base so it can drive to the work. The U.S. mobile robot safety standard, R15.08, also applies to industrial robots attached to a mobile AGV or AMR. Many people call this combination a mobile manipulator.
No feed infrastructure. The robot works at existing shelving, carts, and stations, so you do not need new conveyors or re-racking.
Coverage that moves. You can shift robots between zones, tasks, and shifts as volume moves.
Trade-offs. Each pick includes travel and positioning, so throughput depends on how far it travels between picks, and a fixed cell fed by conveyor can often run faster at a single point. It also needs clear aisles and a decent floor, and its risk assessment covers both the base and the arm.
A mobile pick and place robot adds an arm, a gripper, and perception to the kind of mobile base that AMRs already use to move material.
Fit call
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Fixed vs. mobile: how to choose
Choose a fixed cell when volume is high and steady at one point, items already arrive by conveyor or goods-to-person system, and cycle time matters most.
Choose a mobile robot when work is spread across the building, volume shifts between tasks and shifts, or you cannot add conveyors or re-rack, for example in a leased building.
Wait or stay manual when most items are too large, heavy, or awkward for available grippers, or volume is too low to keep a robot busy. Better picker guidance may be the cheaper fix.
Site walkthrough
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What to test before you buy
Your SKUs in your bins. Pilot on a representative set, including the worst items: polybags, transparent or reflective packaging, deformable items, and very small parts.
Accepted picks, not attempts. Measure successful picks per hour, mispicks, double picks, drops, and damage over hundreds of cycles.
Exceptions. Ask what happens when a pick fails, who clears it, and how long that takes.
Integration. Confirm how tasks come from your WMS or WES and how errors are reported back.
Changeover. Ask how new SKUs are added and whether grippers need to change.
For a full scorecard, see how to evaluate warehouse robotics vendors.
Where Avatar fits
Avatar's robots move between zones and pick directly from your existing racks and bins, and the same robots also pack, kit, sort, and cart. If you have one high-volume transfer point already fed by conveyor, a fixed cell is likely the better fit. See where Avatar works on the Avatar solutions page.
Frequently Asked Questions
What is a pick and place robot used for in a warehouse?
Warehouses use pick and place robots to move items between containers and equipment: picking from totes or shelves into order totes, inducting items onto sorters, placing items into cartons or mailers, and building pallets. Fixed robots do this at one station, while mobile robots drive between locations.
What is the difference between a pick and place robot and a robotic arm?
A robotic arm is the hardware. Pick and place is a task that an arm performs once it has a gripper, a way to locate items, and software to plan grasps. The same arm can do pick and place, packing, or palletizing with different tooling and programming.
How do pick and place robots find items?
In structured work, items arrive in known positions and the robot repeats programmed motions. In warehouse picking, cameras and 3D vision locate items in bins and choose a grasp point, and barcode scans or weight checks often confirm the pick.
Are pick and place robots safe to work near people?
They can be, with a proper risk assessment. Fixed cells are usually guarded or use safety sensors under ANSI/A3 R15.06, which also covers collaborative applications. Mobile robots with arms fall under ANSI/A3 R15.08 for industrial mobile robots.
Sources
1. International Federation of Robotics (n.d.). Industrial Robots: Definition according to ISO 8373:2021. IFR.
2. International Federation of Robotics (2026). U.S. now Second-Largest Robotics Market, Following China (World Robotics 2026 press release, September 24, 2026). IFR.
3. Association for Advancing Automation (2025). New ANSI/A3 R15.06-2025 American National Standard for Industrial Robot Safety Now Available for Purchase (September 9, 2025). A3.
4. Bearman, M., & Cherewka, M. (2021). ANSI/RIA R15.08 standard redefines industrial mobile robots: What's new and why it matters (Vecna Robotics article reprinted by The Robot Report; posted by D. Kara). The Robot Report, April 8, 2021.
5. Correll, N., Bekris, K. E., Berenson, D., Brock, O., Causo, A., Hauser, K., Okada, K., Rodriguez, A., Romano, J. M., & Wurman, P. R. (2016). Analysis and Observations From the First Amazon Picking Challenge. IEEE Transactions on Automation Science and Engineering. arXiv:1601.05484.
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