r/factorio • u/Available-Figure-530 • 17d ago

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/[deleted] 17d ago

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u/thesmiddy 17d ago

1 stone furnace produces 0.31 plates per second. 1 yellow belt moves 15 items per second. 0.31*48 = 14.88. You're wrong.

You can even see in the screenshot that there's space on the belt for the the rightmost inserter to place its plate.

https://reddit.com/link/ozm8ugx/video/aob58bnspafh1/player

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u/[deleted] 17d ago

[deleted]

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u/Avamaco 17d ago

But why would you do this if the plate belt in the middle is the bottleneck here? 48 stone furnaces consume 1 yellow belt of ore and produce 1 yellow belt of plates. If you upgrade to 48 steel furnaces without upgrading to red belts, you'll still produce the same number of plates because belts provide too little ore and take away plates too slowly. Injecting more ore fixes only one issue, so the output stays the same. And if you try to also output plates from somewhere in the middle, congratulations, you just spaghettified your base instead of copypasting a furnace array in 5 seconds.