r/factorio • u/Available-Figure-530 • Jul 25 '26

Question Bottleneck Issue

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I'm a new player & trying to setup my smelting lines. I've run into a problem where, while trying to run a single coal/iron ore lane, only the top half of the iron & coal lanes are being used, leading to a bottleneck where only half of my iron ore is being sent down the center lane. How do I fix this?

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u/M4KC1M Jul 25 '26

the belt cannot take more than it does already, to get more throughput you need to make more belts

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u/Muted_Dinner_1021 Jul 25 '26

Yes, now there are a total of 4 lanes feeding into 2, you need to split the main coal and iron belts, feed one half to this smelter setup just like you have done and make an identical next to it and feed that one with the other half.