Why Factorio logistic and construction robots slow down, gather at roboports or fail to serve an area, and how to isolate charging, coverage, inventory and job availability problems.
Separate a charging queue from an unavailable job
A large cluster of robots at a roboport does not necessarily mean an automation bug. Workers consume energy while flying and must return to a charging point. A busy network may queue far more robots than one nearby port can recharge at once, making delivery times much longer than a direct flight suggests.
Watch whether robots actually fly to the task area, queue at the port, or stay idle. Those are different symptoms. If they reach the charging area and wait, examine available electricity and recharge capacity before rebuilding the chest or inserter configuration.
Inspect coverage and the connected network
Roboports provide distinct coverage functions for construction work and for logistics. Confirm the relevant area is covered and that the ports form the intended connected network. Ports placed near each other can still create an unexpected division if the network does not actually connect in the way you assumed.
Construction robots and logistic robots perform different jobs. Check the robot type, the required item supply and whether a valid task is available. Adding more construction robots will not fix a missing logistic request for items, and additional logistics robots do not automatically repair a missing construction blueprint material.
Reduce unnecessary travel and charging congestion
Examine whether long trips repeatedly route workers through one congested charging point. Additional well-positioned, powered roboports can create more opportunities to recharge, while moving high-volume work closer to supply and demand reduces unnecessary distance. Avoid throwing thousands of robots at a network that lacks enough charging throughput.
Keep robot counts, energy production and task demand in perspective. If robots stop because the network is short of a required item, charging changes will not solve the shortage. Diagnose one cause at a time, observing how the network reacts after every change.
| Symptom | Likely area to investigate |
|---|---|
| Bots circling or queued | Charging congestion and available power |
| Bots never take a job | Task eligibility, inventory and robot type |
| Work stops at a boundary | Roboport coverage and network connectivity |
| Deliveries very slow | Travel distance and recharge placement |
Retest with one representative task
Use a small, repeatable request or construction task to confirm a fix before scaling. Compare whether a worker is dispatched, what it carries and how long it spends waiting at charging ports. This is more informative than changing three parts of the factory at once.
Expansion mechanics and balancing changes can affect the exact capacities of individual devices. Rather than hardcoding a permanent bots-per-minute number, consult the current Factorio Wiki for the equipment and game version you use.
Editorial sources
References to official publishers or specialist game wikis, depending on the topic. Mechanics may change after the last editorial check.
Volpedia is independent and is not affiliated with Factorio or its publisher. This article combines original editorial writing with credited game media where available. Refer to official sources for late-breaking changes.