Moving a Roomba Base: Model Differences
Moving a Roomba base (the charging dock) changes how the robot finds it, how long it takes to return, and whether it can dock at all. The key difference between models is the navigation system: older Roombas use random or bump navigation, while newer ones use cameras or laser mapping, which affects how the base is located and what happens when you move it.
Background: How Roomba Bases Work
The base, officially called the Home Base or Clean Base, serves two main functions: recharging the battery and, on certain models, emptying the dustbin. All Roombas return to the base when the battery is low or when a cleaning cycle finishes. The base emits an infrared signal that the robot uses to find it, and it also has metal contacts that align with the robot’s charging pads.
Older Roomba models (600, 700, 800, and early 900 series) use a “random navigation” system. They do not map your home; they move in straight lines, turn when they hit obstacles, and rely on the infrared signal from the base to find it. When the battery is low, they start a “find home” routine that spirals outward until they pick up the signal.
Newer models (i7, i3, s9, j7, and the i1/j5 series) use either vSLAM (visual simultaneous localization and mapping) with a camera or a laser rangefinder (LiDAR) to create a map of your home. These robots know where the base is on the map, so they can plan a direct path back to it. They also use the infrared signal as a final guide to align with the contacts.
What Changes When You Move the Base
For random-navigation Roombas, moving the base is relatively simple: the robot doesn’t have a map, so it will just use the infrared signal to find the base wherever it is. However, if you move the base to a new location while the robot is cleaning, the robot may become confused because the signal is coming from a different direction than expected. It may take longer to dock, but it will eventually find it.
For mapping Roombas, moving the base is more significant. The robot’s map is tied to the base’s original location. If you move the base, the robot’s map becomes misaligned, because the robot uses the base as a reference point for its position. When you move the base, the robot may think it is in a different place than it actually is. This can cause it to get lost, bump into walls, or fail to return to the base.
Most mapping Roombas will detect that the base has moved and will prompt you to update the map. For example, the iRobot Home app will ask if you want to update the map after the robot docks at a new location. If you don’t update the map, the robot will keep using the old map, which can cause navigation errors.
How Different Models Handle Base Relocation
- 600/700/800/900 series (random navigation): No map, so moving the base is fine. The robot will find it using infrared. Just make sure the base is against a wall with clear space on both sides.
- i1/i3 (smart navigation, no camera): These use a simplified navigation system that doesn’t create a full map. They can still find the base using infrared, but they may not be as efficient as higher-end models. Moving the base is generally fine.
- i7/i8/s9/j7 (vSLAM or LiDAR): These create detailed maps. Moving the base requires updating the map in the app. If you don’t, the robot may get lost. The s9 uses a laser, while the i7 and j7 use a camera.
- Combo j5/j9 (with Clean Base): These also have mapping, and the Clean Base (which empties the bin) is larger and has a more powerful infrared signal. Moving it requires the same map update.
Steps to Move the Base Properly
- Power off the Roomba using the power button (or the app).
- Unplug the base from the wall outlet.
- Move the base to the new location. Make sure it is on a hard, level surface, against a wall, and at least 1.5 feet (0.5 meters) away from corners and obstacles.
- Plug the base back in and wait for the power light to turn on.
- Place the Roomba on the base to charge, and wait for it to connect (the charge light will blink then turn solid).
- Open the iRobot Home app. If the app asks to update the map, follow the prompts. If not, go to Settings > Maps and select “Update Map” or “Reset Map” if the robot seems confused.
Common Problems After Moving the Base
Robot can’t find the base: For random-navigation models, this usually means the base is in a spot where the infrared signal is blocked. Move it to a more open area. For mapping models, it may be because the map wasn’t updated. Reset the map or run a new mapping pass.
Robot docks but doesn’t charge: The metal contacts on the base and the robot may be dirty. Wipe them with a dry cloth. Also, make sure the base is not on a thick carpet, which can prevent the robot from aligning properly.
Robot gets lost or bumps into things: This is a mapping issue. The robot’s internal map is now wrong. Update the map in the app. If that doesn’t work, delete the map and let the robot create a new one.
Clean Base (emptying) doesn’t work after moving: The Clean Base has a dust bin that must be seated correctly. Make sure the bin is pushed in all the way. Also, check that the base’s internal filter is not clogged.
Costs and Practical Considerations
Moving the base itself costs nothing, but if the base is damaged during the move, a replacement Home Base typically costs between $50 and $100, and a Clean Base (with the emptying bin) can cost $200 or more. Avoid pulling the base by the cord, and don’t place it in direct sunlight, as the infrared signal can be interfered with by bright light.
If you move the base to a different floor, you’ll need to either carry the robot to that floor or have a separate base for each floor. Mapping models can store multiple maps (up to 10 for the i7 and newer), so you can create a map for each floor. However, you must physically move the base to the floor you want to clean, and then select the correct map in the app.
Comparison: Old vs. New Navigation
The table below summarizes the key differences in how moving the base affects different models.
| Model Type | Navigation | Effect of Moving Base |
|---|---|---|
| 600/700/800/900 | Random | No map, just uses infrared. Works fine. |
| i1/i3 | Smart (no map) | Uses infrared, works fine, but may be less efficient. |
| i7/i8/s9/j7 | vSLAM or LiDAR | Must update map in app, otherwise robot gets lost. |
| Combo j5/j9 | vSLAM or LiDAR | Same as above, plus Clean Base needs proper seating. |
Safety and Maintenance Tips
- Always unplug the base before moving it to avoid electrical shorts.
- Keep the base away from water sources (sinks, pet bowls) to prevent electrical hazards.
- Clean the charging contacts on both the base and the robot monthly with a dry cloth.
- If the base has a power cord, don’t run it under rugs or furniture where it can be pinched.
- For mapping models, after moving the base, run a “mapping run” or “training run” if the app suggests it, to re-orient the robot.
Frequently Asked Questions
Does moving the base delete my map? No, moving the base doesn’t delete the map, but it makes the map inaccurate. You need to update the map in the app so the robot knows the new base location. If you don’t, the robot will use the old map and may get lost.
Can I move the base to another room without resetting anything? For random-navigation models, yes. For mapping models, you should update the map. If you move it to a different floor, you’ll need to create a new map for that floor or use the same map if the layout is identical (which is rare).
Why is my Roomba not returning to the base after I moved it? The most common reason is that the map is outdated. Open the app and update the map. Also, check that the base is plugged in and the infrared signal isn’t blocked. For random-navigation models, the robot may just be having trouble finding the signal; try placing the base in a more central location.
How long does it take for the Roomba to find the base after moving? For random-navigation models, it can take up to 10-15 minutes as it wanders. For mapping models, it should take a few minutes once the map is updated, because the robot can plan a direct path.
Can I have two bases for the same Roomba? Yes, you can have multiple bases, but the robot can only use one at a time. You’ll need to move the robot to the base you want it to return to. In the app, you can select which base is active for a given schedule.
Does the Clean Base (self-emptying) need special handling when moved? Yes, the Clean Base is heavier and has a dust bin. Make sure the bin is empty and the filter is clean before moving. Also, ensure the base is on a level surface so the robot can align properly for emptying.
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