Utility Robots, Beacons, Utility Science Guide

If you’ve reached the point where basic automation isn’t enough anymore, this is the tier that lets you build faster, research deeper, and compact your factory with support equipment. Utility science packs, Beacons, and personal roboports all sit in the same late-game push, and the best way to handle them is to unlock the right tech in order, feed the bottlenecks correctly, and then use each tool for the job it actually solves.

Unlock the support tech in the right order

Start by pushing toward Processing unit first, because that is the gate that opens the rest of the support tree. From there, your immediate targets are Utility science pack and Personal roboport. Utility science pack needs Robotics, Processing unit, and Low density structure, and it costs Automation science pack×1, Logistic science pack×1, Chemical science pack×1 to unlock. Personal roboport needs Construction robotics and Portable solar panel, with the same science cost. If you want to keep expanding by hand while your factory grows around you, build the Personal roboport path early. If your real problem is space, throughput, or making fewer machines do more work, prioritize Beacons and Effect transmission as soon as you can support them.

Use this stage to plan the whole support layer, not just a single unlock. Beacon is the turning point for compact production, and Effect transmission is what lets you start using modules through Beacons effectively. Personal roboport MK2 comes later and should not distract you from getting the basic support network online first.

Set up a dedicated Utility science production line

Do not try to make Utility science pack as an opportunistic side craft. It belongs in a dedicated science area fed by long-run intermediate product lines. The recipe is straightforward, but the ingredients are not: Low density structure×3, Processing unit×2, Flying robot frame×1 → Utility science pack×3, made in Assembling machine 1 in 21s. That tells you exactly what kind of build this is: a mid-to-late game science pack built from high-tier intermediates, not raw ores or simple plates.

Here’s a quick reference for the core pieces you are building around:

Build the science block like a hub. Feed it from stable electronic circuit, Processing unit, and low density structure lines instead of hand-tapping production whenever you need a batch. The more you centralize this, the easier it becomes to expand later without redoing everything.

Feed the real bottlenecks before you expand the science block

The fastest way to stall Utility science pack is to underbuild the upstream intermediates. Processing unit production is the first place to look, because the recipe pulls in Electronic circuit×20, Advanced circuit×2, and Sulfuric acid×5 for each Processing unit. That means your science line is not just consuming circuits; it is also leaning on oil processing and acid supply. If Processing unit output wobbles, the whole science build will wobble with it.

Treat electronic circuits and Processing units as the first bottlenecks to stabilize. Then buffer the intermediate products that stall easily: low density structures, Flying robot frames, and any other shared high-tier parts feeding your support tech. Chests or passive provider belts are good enough here because their job is not to accelerate the line, but to keep it from stopping when one upstream thread dips. That small buffer can save you from constant micro-fixes.

The raw supply behind a single Utility science pack, assuming advanced oil processing, comes from iron plate, copper plate, coal, crude oil, and water. You do not need to think about that every minute, but you do need to respect what it implies: this is a multi-resource production chain, so underfeeding oil or circuits will hurt you long before assemblers themselves become the problem. Keep the production area fed from stable lanes or trains, and group battery and lubricant production near oil so you are not fighting fluid logistics across the map.

Place Beacons where they will actually help

Beacon is one of the easiest late-game items to misuse. It transmits the effect of modules to nearby friendly entities, and those transmission effects stack with diminishing returns. That means you should not scatter Beacons everywhere just because you can. Place them where they reduce machine count or shrink footprint the most, and leave them out where normal production already fits comfortably.

Use Beacons when you are compacting a build, not when you are merely adding capacity. A common mistake is to put Beacons around every machine and hope for better results. Instead, focus on the machines that define the throughput of the whole block, then build the layout around that choice. Beacon costs are not trivial either: Electronic circuit×20, Advanced circuit×20, Steel plate×10, Copper cable×10. So every Beacon should earn its place by solving a real layout problem.

If you are still in the phase of just getting stable production online, build the unboosted factory first and only add Beacon support once the line already works. That way you can see whether the bottleneck is truly machine count or whether the issue is really somewhere upstream, like Processing unit supply.

Turn Personal roboport and Personal roboport MK2 into real base-building power

Personal roboport is the piece that changes how you expand your base day to day. It allows construction bots to work from your inventory, which means you can keep building, upgrading, and repairing without returning to a fixed roboport network every time. Its recipe is manageable by late-game standards: Advanced circuit×10, Iron gear wheel×40, Steel plate×20, Battery×45 → Personal roboport×1.

Make the basic Personal roboport first. You will feel the benefit immediately when your bots start working from your own equipment setup, and it is the cleanest way to step into portable construction support. Once that feels useful, move to Personal roboport MK2. It extends the wearer’s construction and logistics roboport capabilities compared with earlier portable roboport equipment, but it is a much heavier investment: Personal roboport×5, Processing unit×100, Low density structure×20 → Personal roboport MK2×1.

Keep the power question in mind while you plan this gear. Personal roboports interact with equipment grids, power supply from batteries or generators, and construction/logistic robots when active. If your equipment grid cannot support the load, the upgrade will sit there without giving you the mobility you expected. So do not rush MK2 before your armor grid and power setup are ready. Start with the basic unit, verify that your bot logistics feel smoother, and then scale into MK2 when you can comfortably afford the Processing unit and Low density structure demand.

If you follow that order, the whole tier becomes much easier to manage: unlock Processing unit, get Utility science pack running, stabilize the circuit-heavy bottlenecks, add Beacons where compactness matters, and then use Personal roboport and Personal roboport MK2 to make the rest of your factory easier to build and maintain.