AMR vs AGV — The Real Difference
Most salespeople use these terms interchangeably. They are not the same. The difference determines whether your robot can handle a pallet that fell in the aisle or stop dead and wait for help.
| AGV (Automated Guided Vehicle) | AMR (Autonomous Mobile Robot) | |
|---|---|---|
| Navigation | Fixed path (tape, wire, magnets) | Free navigation (LiDAR + camera, no path) |
| Obstacle handling | Stops. Waits for help. | Re-routes around it |
| Path flexibility | Re-lay tape to change route | Update software map |
| Facility changes | Needs physical floor work | Zero floor modifications |
| Cost per unit | $30,000–$70,000 | $50,000–$120,000 |
| Best for | Fixed, repetitive routes | Dynamic environments with changing traffic |
The two-sentence test: If you can pick the robot up, move it to a different aisle, and it figures out where it is without reprogramming — it's an AMR. If it beeps in confusion and needs you to recalibrate — it's an AGV.
What Are Autonomous Mobile Robots
How an AMR Actually Navigates
No tapes. No wires cut into the floor. No QR codes every 3 meters.
An AMR uses:
LiDAR (Laser scanning) — Spinning laser sensor on top (looks like a hockey puck). Fires laser pulses in 360°, measures how long they take to bounce back. Builds a real-time map of walls, racks, pallets, and people.
SLAM algorithm — Simultaneous Localization and Mapping. The robot builds a map of the facility while simultaneously tracking where it is inside that map. No pre-installed infrastructure needed.
Safety scanners — Front-facing laser scanners that create a 2‑meter 'slow zone' and a 500 mm 'stop zone.' If something enters the slow zone, the AMR slows down. If something enters the stop zone, it stops instantly.
Cameras (optional) — For reading barcodes on pallets, recognizing specific rack locations, or verifying load orientation.
The results: The AMR drives itself to a destination, avoids a forklift backing out of an aisle, re-routes around a pallet that fell off a rack, and arrives at its drop-off point ±20 mm accuracy. All without tape, without magnets, and without someone pressing a button.
What AMRs Can Carry
| Type | Payload | Typical Use |
|---|---|---|
| Small AMR (shelf-top) | 50–250 kg | Tote and cart transport in light manufacturing |
| Mid-size AMR (flat-top) | 250–1,000 kg | Pallet transport, roll cages, bins |
| Heavy AMR (platform) | 1,000–2,000 kg | Full pallets, heavy components |
| AMR forklift | 1,000–2,000 kg with lift | Pallet pick-up and drop-off from rack (no human needed) |
Small AMRs (like MiR 100, 200, 250) — carry totes of parts between workstations in a factory. They don't lift. They just transport.
Mid-size AMRs (like OTTO 750, Locus Vector) — carry full pallets or roll cages from dock to staging, staging to rack.
AMR forklifts — Fully automated counterbalance or reach truck. Picks pallets from floor or rack, transports them, drops them. No operator at all.
Where AMRs Actually Work (And Where They Don't)
✅ Good for AMRs
| Application | Why It Works |
|---|---|
| Dock-to-staging transfer | Fixed route, predictable, high volume |
| Staging-to-rack put-away | Repetitive, known drop zones |
| Workstation replenishment | Factory floor with moving people |
| Hospital logistics | Clean predictable hallways, avoid elevators |
| E-commerce goods-to-person | AMR brings racks to picker, picker stays stationary |
❌ Bad for AMRs
| Application | Why It Fails |
|---|---|
| Unstructured outdoor terrain | LiDAR struggles with mud, snow, rain |
| Extremely narrow aisles (<2.2 m) | AMR can't pass a forklift in the same aisle |
| Multi-level rack picking (above floor) | AMR forklifts exist but are expensive vs human |
| Facilities with zero WiFi | AMRs need comms for task dispatch and status updates |
| Low-throughput, cheap-labor operations | $50,000 AMR replacing a $25,000/year worker doesn't math |
The Business Case
When an AMR makes financial sense
An AMR costs $50,000–$120,000. It moves about as fast as a slow-walking person — 1.0–1.8 m/s. It carries a pallet, works 20 hours a day (recharging 4 hours), and doesn't take breaks.
Payback analysis:
| Human Operator | AMR | |
|---|---|---|
| Annual cost (fully loaded) | $40,000–$60,000 | $8,000–$15,000 (power + maintenance) |
| Hours per shift | 8 | 20 (with opportunity charging) |
| Pallets moved per hour | 15–25 | 10–18 |
| Pallets per day (1 shift) | 120–200 | 200–360 (if run 2 shifts unattended) |
| Errors / damage incidents | 1–3 per month | Near zero |
Typical payback: 12–24 months when replacing 1.5–2 FTE equivalents.
When an AMR doesn't make sense
- One shift operation, cheap labor market ($3–$8/hour) — The AMR pays back in 5+ years
- Less than 100 pallet moves per day — Too little volume to justify
- Chaotic warehouse with no process — The AMR will efficiently move pallets to wrong locations if your inventory data is garbage
The Vendors (Who Makes What)
| Company | Focus | Price Range |
|---|---|---|
| MiR (Mobile Industrial Robots) | Small to mid-size (100–1,350 kg) | $40,000–$80,000 |
| OTTO Motors (Rockwell) | Mid to heavy (750–1,500 kg) | $60,000–$120,000 |
| Locus Robotics | Goods-to-person e-commerce | $35,000–$50,000 per bot (lease model) |
| Geek+ | Warehousing, e-commerce, pallet transport | $30,000–$80,000 |
| Fetch Robotics | Manufacturing & warehouse | $40,000–$90,000 |
| Hebei Maoxiang | Heavy AMR + AMR forklifts | $40,000–$80,000 |
The 4 Questions to Ask Before You Buy
1. Do you have clean inventory data?
If your WMS says a pallet is in location A17 but it's actually in A19, the AMR will go to A17, fail to find the pallet, and raise an exception. Now you have an expensive robot waiting for a human to fix your inventory error. Fix barcode scanning first.
2. Is your route volume high enough?
Count how many pallet moves per day happen on the route you want to automate. If it's under 100 per shift, an AMR doesn't pay back. If it's over 200, it's worth looking at.
3. Can your WiFi handle it?
AMRs need consistent WiFi for communication. If your warehouse has dead zones, the AMR will stop in a dead zone and wait. You'll get a 'robot stuck' notification with no context. Map your WiFi coverage before install.
4. Do you have the floor space?
AMRs need 2.5–3 m clear aisle width to operate alongside forklifts. In a narrow-aisle warehouse (2.2 m), the AMR blocks the aisle when it's moving. That creates more traffic problems than it solves.
Common AMR Installation Failures
We deliver an AMR. The customer's warehouse has 8% inventory error. The AMR can't find pallets. Customer blames AMR. AMR didn't create the inventory problem — it only revealed it.
Customer buys AMR for a route with 60 moves per day. Payback calculated: 36 months. After 18 months, the company realizes the AMR sits idle 60% of the day.
Customer installs AMR. Warehouse has WiFi dead zones in 3 of the 5 zones the AMR drives through. AMR loses connection, stops, waits. Operations team loses trust in the robot within 2 weeks.
Common pattern: All three failures are facility/process problems, not robot problems. The robot does what it's told. If the data, volume, or infrastructure isn't ready, the robot just makes the problems visible faster.
The Bottom Line
An AMR is a self-driving pallet mover. It doesn't need tape, guides, or floor modifications. It uses LiDAR to see walls and obstacles, and it re-routes around problems instead of stopping.
It's not a replacement for forklifts or operators — it's a replacement for wasted walking and empty miles. In the right facility (clean data, high volume, good WiFi), it pays back in 12–24 months. In the wrong facility, it becomes a very expensive lesson in process hygiene.
Buy AMR after you fix your inventory, barcode scanning, and WiFi. Not before.
We build AMRs and AMR forklifts for material handling — full pallet transport, dock-to-staging, and automated put-away. Contact us for a route analysis: we'll tell you if your volume supports automation, or if you need to fix the basics first.
Hebei Maoxiang Technology Co., Ltd.
- forkliftlift.com
- Electric forklifts | Pallet jacks | Reach trucks | AGVs | AMRs
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